Texas Instruments 的 BQ2410x(A), 11x(A) 規格書

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V'.‘ 3!. B X I TEXAS INSTRUMENTS

3IN

4IN

6VCC

2STAT1

19STAT2

5PG

7 TTC

16CE

10VSS

13NC

OUT 1

OUT 20

PGND17

PGND18

SNS15

BAT 14

ISET18

ISET29

TS12

VTSB11

VIN

LOUT

CIN COUT

RSNS

0.1W

1.5KW1.5KW1.5KW

Charge

DoneAdapter

Present

7.5KW

9.31KW

442KW

RT1

103AT

Battery

Pack

Pack-

Pack+

0.1 Fm

10 Fm

10 Hm

10 Fm

BQ24100

RISET2

RISET1

RT2

CTTC

VTSB

MMBZ18VALT1

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

bq241xx Synchronous Switched-Mode, Li-Ion and Li-Polymer Charge-Management

IC With Integrated Power FETs (bqSWITCHER™)

1 Features 2 Applications

1• Ideal For Highly Efficient Charger Designs For • Handheld Products

Single-, Two-, or Three-Cell Li-Ion and Li-Polymer • Portable Media Players

Battery Packs • Industrial and Medical Equipment

• bq24105 Also for LiFePO4Battery (see Using • Portable Equipment

bq24105 to Charge the LiFePO4Battery)

• Integrated Synchronous Fixed-Frequency PWM 3 Description

Controller Operating at 1.1 MHz With 0% to 100% The bqSWITCHER™ series are highly integrated Li-

Duty Cycle ion and Li-polymer switch-mode charge management

devices targeted at a wide range of portable

• Integrated Power FETs for Up To 2-A Charge applications. The bqSWITCHER™ series offers

Rate integrated synchronous PWM controller and power

• High-Accuracy Voltage and Current Regulation FETs, high-accuracy current and voltage regulation,

• Available in Both Stand-Alone (Built-In Charge charge preconditioning, charge status, and charge

Management and Control) and System-Controlled termination, in a small, thermally enhanced VQFN

(Under System Command) Versions package. The system-controlled version provides

additional inputs for full charge management under

• Status Outputs for LED or Host Processor system control.

Interface Indicates Charge-In-Progress, Charge

Completion, Fault, and AC-Adapter Present The bqSWITCHER™ charges the battery in three

Conditions phases: conditioning, constant current, and constant

voltage. Charge is terminated based on user-

• 20-V Maximum Voltage Rating on IN and OUT selectable minimum current level. A programmable

Pins charge timer provides a safety backup for charge

• High-Side Battery Current Sensing termination. The bqSWITCHER™ automatically

• Battery Temperature Monitoring restarts the charge cycle if the battery voltage falls

below an internal threshold. The bqSWITCHER™

• Automatic Sleep Mode for Low Power automatically enters sleep mode when VCC supply is

Consumption removed.

• System-Controlled Version Can Be Used in NiMH

and NiCd Applications Device Information (1)

• Reverse Leakage Protection Prevents Battery PART NUMBER PACKAGE BODY SIZE (NOM)

Drainage bq241xx VQFN (20) 3.50 mm × 4.50 mm

• Thermal Shutdown and Protection (1) For all available packages, see the orderable addendum at

the end of the data sheet.

• Built-In Battery Detection

• Available in 20-Pin, 3.50 mm × 4.50 mm VQFN

Package

Typical 1-Cell Application

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

l TEXAS INSTRUMENTS

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

Table of Contents

1 Features.................................................................. 19 Application and Implementation ........................ 24

9.1 Application Information............................................ 24

2 Applications ........................................................... 19.2 Typical Application ................................................. 24

3 Description ............................................................. 19.3 System Examples ................................................... 28

4 Revision History..................................................... 210 Power Supply Recommendations ..................... 32

5 Device Options....................................................... 411 Layout................................................................... 32

6 Pin Configuration and Functions......................... 511.1 Layout Guidelines ................................................. 32

7 Specifications......................................................... 611.2 Layout Example .................................................... 34

7.1 Absolute Maximum Ratings ..................................... 611.3 Thermal Considerations........................................ 34

7.2 ESD Ratings.............................................................. 612 Device and Documentation Support ................. 35

7.3 Recommended Operating Conditions....................... 712.1 Device Support...................................................... 35

7.4 Thermal Information.................................................. 712.2 Documentation Support ........................................ 35

7.5 Electrical Characteristics........................................... 712.3 Related Links ........................................................ 35

7.6 Dissipation Ratings ................................................. 10 12.4 Community Resources.......................................... 35

7.7 Typical Characteristics............................................ 10 12.5 Trademarks........................................................... 35

8 Detailed Description............................................ 11 12.6 Electrostatic Discharge Caution............................ 36

8.1 Overview ................................................................. 11 12.7 Glossary................................................................ 36

8.2 Functional Block Diagram....................................... 12 13 Mechanical, Packaging, and Orderable

8.3 Feature Description................................................. 13 Information ........................................................... 36

8.4 Device Functional Modes........................................ 22

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision O (March 2010) to Revision P Page

• Added ESD Ratings table, Feature Description section, Device Functional Modes,Application and Implementation

section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and

Mechanical, Packaging, and Orderable Information section.................................................................................................. 1

Changes from Revision M (August 2008) to Revision N Page

• Added part number bq24104.................................................................................................................................................. 1

• Added part number bq24104 to the Ordering Information ..................................................................................................... 4

• Deleted Product Preview from bq24104RHLR....................................................................................................................... 4

• Deleted Product Preview from bq24104RHLT ....................................................................................................................... 4

• Added bq24104 to the Terminal Functions table.................................................................................................................... 5

• Added part number bq24104 to the Deglitch time.................................................................................................................. 8

• Added bq24104 to Table 2................................................................................................................................................... 16

• Added part number bq24104 to Figure 16 .......................................................................................................................... 28

Changes from Revision L (December 2007) to Revision M Page

• Changed specifications and symbols for (cold, hot, and cutoff) temperature thresholds....................................................... 8

• Changed equation definitions............................................................................................................................................... 13

• Changed equation definitions............................................................................................................................................... 27

Changes from Revision K (November 2007) to Revision L Page

• Changed Added figure almost identical to Figure 3. Changed RISET2 to 20 kohms.......................................................... 31

• Added Changed resistor bridge values 301 to 143, 100 to 200 Kohms............................................................................... 31

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

www.ti.com

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

Changes from Revision J (October 2007) to Revision K Page

• Changed From: CIU To: CDY................................................................................................................................................. 4

• Added bq24109 to VOREG ....................................................................................................................................................... 7

• Added part number bq24109 to VLOWV .................................................................................................................................. 8

• Changed Deglitch time for temperature fault, TS, bq24109 typical value From: 1000 To: 500............................................. 8

• Changed From: Single-cell or two-cell To: one-, two-, or three-cell applications. Deleted text............................................ 13

Changes from Revision I (August 2007) to Revision J Page

• Added part number bq24109 ................................................................................................................................................. 1

• Added part number bq24109 to the Ordering Information ..................................................................................................... 4

• Added bq24109 to the Terminal Functions table.................................................................................................................... 5

• Added part number bq24109 to the Deglitch time.................................................................................................................. 8

• Added bq24109 to Table 2................................................................................................................................................... 16

Changes from Revision H (July 2007) to Revision I Page

• Added part number bq24103A .............................................................................................................................................. 1

• Changed device size From: 5,5 mm x 3.5 mm To: 4,5 mm x 3.5 mm................................................................................... 1

• Added part number bq24103A to the Ordering Information................................................................................................... 4

• Added bq24103A to the Terminal Functions table................................................................................................................. 5

• Added part numbers bq24103Ana d bq24113A to VOREG ..................................................................................................... 7

• Added part number bq24103A to VLOWV ................................................................................................................................ 8

• Added part number bq24103A to Figure 16 ........................................................................................................................ 28

Changes from Revision G (June 2007) to Revision H Page

• Changed Figure 1 ................................................................................................................................................................ 10

• Changed Figure 2 ................................................................................................................................................................ 10

• Added D1 to diode MMBZ18VALT1 in Figure 13................................................................................................................. 24

• Added D1 to diode MMBZ18VALT1 in Figure 16 ................................................................................................................ 28

• Added D1 to diode MMBZ18VALT1 in Figure 17 ................................................................................................................ 29

• Added D1 to diode MMBZ18VALT1 and Note A to Figure 18. ............................................................................................ 29

Changes from Revision F (January 2007) to Revision G Page

• Added bq24113A to the data sheet and the Ordering Information......................................................................................... 4

• Added bq24113A to the Terminal Functions table................................................................................................................. 5

• Changed bq24113A added to Figure 18 ............................................................................................................................. 29

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

5 Device Options

CHARGE REGULATION VOLTAGE (V) INTENDED APPLICATION PART NUMBER (1) (2) (3)

4.2 V Stand-alone bq24100

1 or 2 cells selectable (CELLS pin, 4.2 V or 8.4 V) Stand-alone bq24103

1 or 2 cells selectable (CELLS pin, 4.2 V or 8.4 V) Stand-alone bq24103A

1 or 2 cells selectable (CELLS pin, 4.2 V or 8.4 V) Stand-alone bq24104

(Blinking status pins)

Externally programmable (2.1 V to 15.5 V) Stand-alone bq24105

bq24108

4.2 V (Blinking status pins) Stand-alone bq24109

1 or 2 cells selectable (CELLS pin, 4.2 V or 8.4 V) System-controlled bq24113

1 or 2 cells selectable (CELLS pin, 4.2 V or 8.4 V) System-controlled bq24113A

Externally programmable (2.1 V to 15.5 V) System-controlled bq24115

(1) The RHL package is available in the following options:

T– taped and reeled in quantities of 250 devices per reel

R– taped and reeled in quantities of 3000 devices per reel

(2) This product is RoHS-compatible, including a lead concentration that does not exceed 0.1% of total product weight, and is suitable for

use in specified lead-free soldering processes.

(3) TJ= –40°C to 125°C

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS

STAT1

VCC

TTCorCMODE

ISET1

ISET2

STAT2orNC

PGND

SNS

BAT

CELLSorFBorNC

OUT

VTSB

VSS

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

www.ti.com

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

6 Pin Configuration and Functions

RHL Package

20-Pin VQFN

Top View

bq24100, 03, 03A, 04, 05, 08, 09, 13, 13A, 15

Pin Functions

bq24100, bq24103, I/O DESCRIPTION

bq24113,

NAME bq24108, bq24103A bq24105 bq24115

bq24113A

bq24109 bq24104

Battery voltage sense input. Bypass it with a 0.1 μF capacitor to PGND if

BAT 14 14 14 14 14 I there are long inductive leads to battery.

Charger enable input. This active low input, if set high, suspends charge

CE 16 16 16 16 16 I and places the device in the low-power sleep mode. Do not pull up this

input to VTSB.

Available on parts with fixed output voltage. Ground or float for single-cell

CELLS 13 13 I operation (4.2 V). For two-cell operation (8.4 V) pull up this pin with a

resistor to VCC.

Charge mode selection: low for precharge as set by ISET2 pin and high

CMODE 7 7 I (pull up to VTSB or <7 V) for fast charge as set by ISET1.

Output voltage analog feedback adjustment. Connect the output of a

FB 13 13 I resistive voltage divider powered from the battery terminals to this node to

adjust the output battery voltage regulation.

IN 3, 4 3, 4 3, 4 3, 4 3, 4 I Charger input voltage.

Charger current set point 1 (fast charge). Use a resistor to ground to set

ISET1 8 8 8 8 8 I/O this value.

Charge current set point 2 (precharge and termination), set by a resistor

connected to ground. A low-level CMODE signal selects the ISET2 charge

ISET2 9 9 9 9 9 I/O rate, but if the battery voltage reaches the regulation set point,

bqSWITCHER™ changes to voltage regulation regardless of CMODE

input.

N/C 13 19 19 - No connection. This pin must be left floating in the application.

1 1 1 1 1 O Charge current output inductor connection. Connect a zener TVS diode

OUT between OUT pin and PGND pin to clamp the voltage spike to protect the

20 20 20 20 20 O power MOSFETs during abnormal conditions.

Power-good status output (open drain). The transistor turns on when a

PG 5 5 5 5 5 O valid VCC is detected. It is turned off in the sleep mode. PG can be used to

drive a LED or communicate with a host processor.

PGND 17,18 17,18 17,18 17,18 17, 18 Power ground input

Charge current-sense input. Battery current is sensed via the voltage drop

SNS 15 15 15 15 15 I developed on this pin by an external sense resistor in series with the

battery pack. A 0.1-μF capacitor to PGND is required.

Charge status 1 (open-drain output). When the transistor turns on

STAT1 2 2 2 2 2 O indicates charge in process. When it is off and with the condition of STAT2

indicates various charger conditions (See Table 1)

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

Pin Functions (continued)

bq24100, bq24103, I/O DESCRIPTION

bq24113,

NAME bq24108, bq24103A bq24105 bq24115

bq24113A

bq24109 bq24104

Charge status 2 (open-drain output). When the transistor turns on

STAT2 19 19 19 O indicates charge is done. When it is off and with the condition of STAT1

indicates various charger conditions (See Table 1)

Temperature sense input. This input monitors its voltage against an

internal threshold to determine if charging is allowed. Use an NTC

TS 12 12 12 12 12 I thermistor and a voltage divider powered from VTSB to develop this

voltage. (See Figure 4)

Timer and termination control. Connect a capacitor from this node to GND

TTC 7 7 7 I to set the bqSWITCHER™ timer. When this input is low, the timer and

termination detection are disabled.

VCC 6 6 6 6 6 I Analog device input. A 0.1 μF capacitor to VSS is required.

VSS 10 10 10 10 10 Analog ground input

TS internal bias regulator voltage. Connect capacitor (with a value

VTSB 11 11 11 11 11 O between a 0.1-μF and 1-μF) between this output and VSS.

There is an internal electrical connection between the exposed thermal

pad and VSS. The exposed thermal pad must be connected to the same

Exposed potential as the VSS pin on the printed circuit board. The power pad can

Thermal Pad Pad Pad Pad Pad be used as a star ground connection between VSS and PGND. A common

Pad ground plane may be used. VSS pin must be connected to ground at all

times.

7 Specifications

7.1 Absolute Maximum Ratings (1)

over operating free-air temperature range (unless otherwise noted)

MIN MAX UNIT

Supply voltage (with respect to IN, VCC 20 V

VSS)

STAT1, STAT2, PG, CE, CELLS, SNS, BAT –0.3 20 V

OUT –0.7 20 V

Input voltage (with respect to CMODE, TS, TTC 7 V

VSS and PGND) VTSB 3.6 V

ISET1, ISET2 3.3 V

Voltage difference between SNS and BAT inputs (VSNS – VBAT) ±1 V

Output sink STAT1, STAT2, PG 10 mA

Output current (average) OUT 2.2 A

Operating free-air temperature, TA–40 85 °C

Junction temperature, TJ–40 125 °C

Lead temperature 1.6 mm (1/16 inch) from case for 10 seconds 300 °C

Storage temperature, Tstg –65 150 °C

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings

only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended

Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

7.2 ESD Ratings

VALUE UNIT

Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) ±2000

V(ESD) Electrostatic discharge V

Charged-device model (CDM), per JEDEC specification JESD22-C101 ±500

(2)

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS ‘000‘ 1v VIREG RSET‘

VIREG +1V

RSET1 1000,

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

www.ti.com

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

7.3 Recommended Operating Conditions

MIN NOM MAX UNIT

Supply voltage, VCC and IN (Tie together) 4.35 (1) 16 (2) V

Operating junction temperature range, TJ–40 125 °C

(1) The IC continues to operate below Vmin, to 3.5 V, but the specifications are not tested and not specified.

(2) The inherent switching noise voltage spikes should not exceed the absolute maximum rating on either the IN or OUT pins. A tight layout

minimizes switching noise.

7.4 Thermal Information

bq241xx

THERMAL METRIC (1) RHL (VQFN) UNIT

20 PINS

RθJA Junction-to-ambient thermal resistance 39.2 °C/W

RθJC(top) Junction-to-case (top) thermal resistance 39.3 °C/W

RθJB Junction-to-board thermal resistance 15.8 °C/W

ψJT Junction-to-top characterization parameter 0.6 °C/W

ψJB Junction-to-board characterization parameter 15.8 °C/W

RθJC(bot) Junction-to-case (bottom) thermal resistance 3.6 °C/W

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report, SPRA953.

7.5 Electrical Characteristics

TJ= 0°C to 125°C and recommended supply voltage range (unless otherwise stated)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

INPUT CURRENTS

VCC > VCC(min), PWM switching 10 mA

I(VCC) VCC supply current VCC > VCC(min), PWM NOT switching 5

VCC > VCC(min), CE = HIGH 315 μA

0°C ≤TJ≤65°C, VI(BAT) = 4.2 V, 3.5

VCC < V(SLP) or VCC > V(SLP) but not in charge

Battery discharge sleep current, (SNS, 0°C ≤TJ≤65°C, VI(BAT) = 8.4 V,

I(SLP) 5.5 μA

BAT, OUT, FB pins) VCC < V(SLP) or VCC > V(SLP) but not in charge

0°C ≤TJ≤65°C, VI(BAT) = 12.6 V, 7.7

VCC < V(SLP) or VCC > V(SLP) but not in charge

VOLTAGE REGULATION

CELLS = Low, in voltage regulation 4.2

Output voltage, bq24103/03A/04/13/13A

VOREG CELLS = High, in voltage regulation 8.4 V

Output voltage, bq24100/08/09 Operating in voltage regulation 4.2

Feedback regulation REF for bq24105/15

VIBAT IIBAT = 25 nA typical into pin 2.1 V

only (W/FB)

TA= 25°C –0.5% 0.5%

Voltage regulation accuracy –1% 1%

CURRENT REGULATION - FAST CHARGE

VLOWV ≤VI(BAT) < VOREG,

IOCHARGE Output current range of converter 150 2000 mA

V(VCC) - VI(BAT) > V(DO-MAX)

100 mV ≤VIREG≤200 mV,

VIREG Voltage regulated across R(SNS) Accuracy –10% 10%

Programmed Where

5 kΩ ≤ RSET1 ≤10 kΩ, Select RSET1 to

program VIREG,

VIREG(measured) = IOCHARGE + RSNS

(–10% to 10% excludes errors due to RSET1

and R(SNS) tolerances)

V(LOWV) ≤VI(BAT) ≤VO(REG),

V(ISET1) Output current set voltage 1 V

V(VCC) ≤VI(BAT) ×V(DO-MAX)

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS V 0.1V IREGrPRE RSETZ ‘000.

VIREG*PRE +0.1V

RSET2 1000,

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

Electrical Characteristics (continued)

TJ= 0°C to 125°C and recommended supply voltage range (unless otherwise stated)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

VLOWV ≤VI(BAT) < VO(REG) ,

K(ISET1) Output current set factor 1000 V/A

V(VCC) ≤VI(BAT) +V(DO-MAX)

PRECHARGE AND SHORT-CIRCUIT CURRENT REGULATION

Precharge to fast-charge transition voltage

VLOWV threshold, BAT, 68 71.4 75 %VO(REG)

bq24100/03/03A/04/05/08/09 ICs only

Deglitch time for precharge to fast charge Rising voltage;

t 20 30 40 ms

transition, tRISE, tFALL = 100 ns, 2-mV overdrive

IOPRECHG Precharge range VI(BAT) < VLOWV, t < tPRECHG 15 200 mA

V(ISET2) Precharge set voltage, ISET2 VI(BAT) < VLOWV, t < tPRECHG 100 mV

K(ISET2) Precharge current set factor 1000 V/A

100 mV ≤VIREG-PRE ≤100 mV,

VIREG-PRE Voltage regulated across RSNS-Accuracy –20% 20%

(PGM) Where

1.2 kΩ ≤ RSET2 ≤10 kΩ, Select RSET1

to program VIREG-PRE,

VIREG-PRE (Measured) = IOPRE-CHG × RSNS

(–20% to 20% excludes errors due to RSET1

and RSNS tolerances)

CHARGE TERMINATION (CURRENT TAPER) DETECTION

ITERM Charge current termination detection range VI(BAT) > VRCH 15 200 mA

Charge termination detection set voltage,

VTERM VI(BAT) > VRCH 100 mV

ISET2

K(ISET2) Termination current set factor 1000 V/A

Charger termination accuracy VI(BAT) > VRCH –20% 20%

Both rising and falling,

tdg-TERM Deglitch time for charge termination 20 30 40 ms

2-mV overdrive tRISE, tFALL = 100 ns

TEMPERATURE COMPARATOR AND VTSB BIAS REGULATOR

%LTF Cold temperature threshold, TS, % of bias VLTF = VO(VTSB) × % LTF/100 72.8% 73.5% 74.2%

%HTF Hot temperature threshold, TS, % of bias VHTF = VO(VTSB) × % HTF/100 33.7% 34.4% 35.1%

Cutoff temperature threshold, TS, % of

%TCO VTCO = VO(VTSB) × % TCO/100 28.7% 29.3% 29.9%

bias

LTF hysteresis 0.5% 1% 1.5%

Deglitch time for temperature fault, TS 20 30 40

Both rising and falling,

tdg-TS ms

Deglitch time for temperature fault, TS, 2-mV overdrive tRISE, tFALL = 100 ns 500

bq24109, bq24104

VCC > VIN(min),

VO(VTSB) TS bias output voltage 3.15 V

I(VTSB) = 10 mA 0.1 μF≤CO(VTSB) ≤1μF

VCC >IN(min),

VO(VTSB) TS bias voltage regulation accuracy –10% 10%

I(VTSB) = 10 mA 0.1 μF≤CO(VTSB) ≤1μF

BATTERY RECHARGE THRESHOLD

VRCH Recharge threshold voltage Below VOREG 75 100 125 mV/cell

VI(BAT) < decreasing below threshold,

tdg-RCH Deglitch time 20 30 40 ms

tFALL = 100 ns 10-mV overdrive

STAT1, STAT2, AND PG OUTPUTS

VOL(STATx) Low-level output saturation voltage, STATx IO= 5 mA 0.5 V

VOL(PG) Low-level output saturation voltage, PG IO= 10 mA 0.1

CE CMODE, CELLS INPUTS

VIL Low-level input voltage IIL = 5 μA 0 0.4 V

VIH High-level input voltage IIH = 20 μA 1.3 VCC

TTC INPUT

tPRECHG Precharge timer 1440 1800 2160 s

tCHARGE Programmable charge timer range t(CHG) = C(TTC) × K(TTC) 25 572 minutes

Charge timer accuracy 0.01 μF≤C(TTC) ≤0.18 μF -10% 10%

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

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SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

Electrical Characteristics (continued)

TJ= 0°C to 125°C and recommended supply voltage range (unless otherwise stated)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

KTTC Timer multiplier 2.6 min/nF

CTTC Charge time capacitor range 0.01 0.22 μF

VTTC_EN TTC enable threshold voltage V(TTC) rising 200 mV

SLEEP COMPARATOR

VCC ≤VIBAT VCC ≤VIBAT

2.3 V ≤VI(OUT) ≤VOREG, for 1 or 2 cells +5 mV +75 mV

VSLP-ENT Sleep-mode entry threshold V

VI(OUT) = 12.6 V, RIN = 1 kΩVCC ≤VIBAT VCC ≤VIBAT

bq24105/15 (1) -4 mV +73 mV

VSLP-EXIT Sleep-mode exit hysteresis, 2.3 V ≤VI(OUT)≤VOREG 40 160 mV

VCC decreasing below threshold,

tFALL = 100 ns, 10-mV overdrive, 5 μs

PMOS turns off

tdg-SLP Deglitch time for sleep mode VCC decreasing below threshold,

tFALL = 100 ns, 10-mV overdrive, 20 30 40 ms

STATx pins turn off

UVLO

VUVLO-ON IC active threshold voltage VCC rising 3.15 3.30 3.50 V

IC active hysteresis VCC falling 120 150 mV

PWM

7 V ≤VCC ≤VCC(max) 400

Internal P-channel MOSFET on-resistance 4.5 V ≤VCC ≤7 V 500 mΩ

7 V ≤VCC ≤VCC(max) 130

Internal N-channel MOSFET on-resistance 4.5 V ≤VCC ≤7 V 150

fOSC Oscillator frequency 1.1 MHz

Frequency accuracy –9% 9%

DMAX Maximum duty cycle 100%

DMIN Minimum duty cycle 0%

tTOD Switching delay time (turn on) 20 ns

tsyncmin Minimum synchronous FET on time 60 ns

Synchronous FET minimum current-off 50 400 mA

threshold (2)

BATTERY DETECTION

Battery detection current during time-out

IDETECT VI(BAT) < VOREG – VRCH 2 mA

fault

IDISCHRG1 Discharge current VSHORT < VI(BAT) < VOREG – VRCH 400 μA

tDISCHRG1 Discharge time VSHORT < VI(BAT) < VOREG – VRCH 1 s

IWAKE Wake current VSHORT < VI(BAT) < VOREG – VRCH 2 mA

tWAKE Wake time VSHORT < VI(BAT) < VOREG – VRCH 0.5 s

Begins after termination detected,

IDISCHRG2 Termination discharge current 400 μA

VI(BAT) ≤VOREG

tDISCHRG2 Termination time 262 ms

OUTPUT CAPACITOR

Required output ceramic capacitor range

COUT from SNS to PGND, between inductor and 4.7 10 47 μF

RSNS

Required SNS capacitor (ceramic) at SNS

CSNS 0.1 μF

PROTECTION

Threshold over VOREG to turn off P-channel

VOVP OVP threshold voltage MOSFET, STAT1, and STAT2 during charge 110 117 121 %VO(REG)

or termination states

ILIMIT Cycle-by-cycle current limit 2.6 3.6 4.5 A

VSHORT Short-circuit voltage threshold, BAT VI(BAT) falling 1.95 2 2.05 V/cell

(1) For bq24105 and bq24115 only. RIN is connected between IN and PGND pins and needed to ensure sleep entry.

(2) N-channel always turns on for approximately 60 ns and then turns off if current is too low.

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bq24115

l TEXAS INSTRUMENTS

I -ChargeCurrent- A

(BAT)

Efficiency-%

0.5 1 1.5 2

100

V =4.2V

(BAT)

1-Cell

V =16V

V =5V

I -ChargeCurrent- A

(BAT)

Efficiency-%

V =8.4V

(BAT)

2-Cell

V =9V

0.5 1 1.5 2

100

V =16V

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

Electrical Characteristics (continued)

TJ= 0°C to 125°C and recommended supply voltage range (unless otherwise stated)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

ISHORT Short-circuit current VI(BAT) ≤VSHORT 35 65 mA

TSHTDWN Thermal trip 165 °C

Thermal hysteresis 10 °C

7.6 Dissipation Ratings

TA< 40°C DERATING FACTOR

PACKAGE θJA θJC POWER RATING ABOVE TA= 40°C

RHL (1) 46.87°C/W 2.5°C/W 1.81 W 0.021 W/°C

(1) This data is based on using the JEDEC High-K board, and the exposed die pad is connected to a copper pad on the board. This is

connected to the ground plane by a 2x3 via matrix.

7.7 Typical Characteristics

Figure 1. Efficiency vs Charge Current Figure 2. Efficiency vs Charge Current

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l TEXAS INSTRUMENTS uDGraanv l"

UDG-04037

VLOW

Charge Voltage

Charge Current

Regulation Voltage

Regulation Current

VSHORT

Voltage Regulation and

Charge Termination Phase

Precharge

Timer

Programmable

Safety Timer

Current Regulation Phase

Precharge

Phase

Precharge

and Termination

ISHORT

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

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SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

8 Detailed Description

8.1 Overview

The bqSWITCHER™ supports a precision Li-ion or Li-polymer charging system for single cell or two cell

applications. The device has a battery detect scheme that allows it to automatically detect the presence and

absence of a battery. When the battery is detected, charging begins in one of three phases (depending upon

battery voltage): precharge, constant current (fast-charge current regulation), and constant voltage (fast-charge

voltage regulation). The device will terminate charging when the termination current threshold has been reached

and will begin a recharge cycle when the battery voltage has dropped below the recharge threshold (VRCG).

Precharge, constant current, and termination current can be configured through the ISET1 and ISET2 pins,

allowing for flexibility in battery charging profile. During charging, the integrated fault monitors of the device, such

as battery short detection (VSHORT), thermal shutdown (internal TSHTDWN and TS pin), and safety timer expiration

(TTC pin), ensure battery safety.

bqSWITCHER™ has three status pins (STAT1, STAT2, and PG) to indicate the charging status and input

voltage (AC adapter) status. These pins can be used to drive LEDs or communicate with a host processor.

Figure 3. Typical Charging Profile

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‘5‘ TEXAS INSTRUMENTS 666666666666

STAT1

STAT2

VSS

PGND

OUT

PGND

SNS

BAT

CELLS (bq24103/04/13)

FB (bq24105/15)

N/C (bq24100)

ISET1

ISET2

VCC

TTC

VCC

0.5V

VCC

TIMER CLK

0.25V DSABL_TERM

0.75V

TIMER

FF CHAIN

PRE-CHG

TIMEOUT

FAST CHG

TIMEOUT

RESET

bqSWITCHER

bq2410x

VTSB

LTF

HTF

TCO

RSET2

RSET1

VIN

VTSB

VCC

Voltage

Reference

VTSB VCC-6V

UVLO/POR

Vuvlo

POR

2.1V

0.1V

Ibat Reg

Vbat Reg

VCC

20uA

2.1V

VCC

20uA

1V BAT

SPIN

VTSB

MOD

OSC

SUSPEND

UVLO/POR

TIMEOUT FAULT

TERM

PkILim or OVP

RAMP

VCC

I VCC/10

(Vpp=VCC/10)

RAMP

MOD

VCC

VCC-6V

SYNCH

COMPENSA

TION

to FB

10 F

Rsns

Pack+

Pack-

Temp

SLEEP VCC

BAT

50 mV

TEMP

SUSPEND

SPIN

TERM

SLEEP

SUSPEND

OVP

Charge

TERM

BAT

Vreg

VCC

Discharge

Charge

Wake

SNS+

BAT_PRS_dischg

2.1V

Vrch

LowV

VSHORT

30ms

Dgltch

BAT

30ms

Dgltch

Vovp

OVP

CONTROL

LOGIC

(STATE

MACHINE)

OVP

TIMEOUT

SUSPEND

UVLO/

POR

Vrch

Term_Det

LowV

BAT_PRS_

disch

VSHORT

PkILim

SYNCH

SLEEP

Protection PMOS FET is OFF when not charging

or in SLEEP to prevent discharge of battery

when IN < BA

Isynch Synch

V(150 mA)

CHARGE

DISCHARGE

WAKE

PRE-CHARGE

FASTCHG

Disable

PRE-CHG

Disable

FASTCHG

Disable

BAT

SNS

Term_Det

0.1V

30ms

dgltch

Gate

Drive FB

SPIN

ONLY

CLAMP

Icntrl

PkILim

V(3.6A)

Sense FET

VCC

VCC-6V

SLEEP

CHARGE Poff

Term &

Timer

Disable

∗

∗Patent Pending #36889

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

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8.2 Functional Block Diagram

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A bq24115

TEXAS INSTRUMENTS

RT2=

V RTH RTH

O(VTSB) COLD HOT

´ ´ ´ 1

VLTF

VHTF

RTHHOT ´ - ´RTHCOLD

VO(VTSB)

HTF

V-1

( )

VO(VTSB)

LTF

V-1

( )

RT2

RTHCOLD

VO(VTSB)

LTF

V-1

RT1=

Where:

V =V % /100

LTF O(VTSB) LTF 100¸

V =V % /100

HTF O(VTSB) HTF 100¸

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

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SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

8.3 Feature Description

8.3.1 PWM Controller

The bq241xx provides an integrated fixed 1-MHz frequency voltage-mode controller with Feed-Forward function

to regulate charge current or voltage. This type of controller is used to help improve line transient response,

thereby simplifying the compensation network used for both continuous and discontinuous current conduction

operation. The voltage and current loops are internally compensated using a Type-III compensation scheme that

provides enough phase boost for stable operation, allowing the use of small ceramic capacitors with very low

ESR. There is a 0.5 V offset on the bottom of the PWM ramp to allow the device to operate between 0% to 100%

duty cycle.

The internal PWM gate drive can directly control the internal PMOS and NMOS power MOSFETs. The high-side

gate voltage swings from VCC (when off), to VCC-6 (when on and VCC is greater than 6 V) to help reduce the

conduction losses of the converter by enhancing the gate an extra volt beyond the standard 5 V. The low-side

gate voltage swings from 6 V, to turn on the NMOS, down to PGND to turn it off. The bq241xx has two back to

back common-drain P-MOSFETs on the high side. An input P-MOSFET prevents battery discharge when IN is

lower than BAT. The second P-MOSFET behaves as the switching control FET, eliminating the need of a

bootstrap capacitor.

Cycle-by-cycle current limit is sensed through the internal high-side sense FET. The threshold is set to a nominal

3.6 A peak current. The low-side FET also has a current limit that decides if the PWM Controller will operate in

synchronous or non-synchronous mode. This threshold is set to 100 mA and it turns off the low-side NMOS

before the current reverses, preventing the battery from discharging. Synchronous operation is used when the

current of the low-side FET is greater than 100 mA to minimize power losses.

8.3.2 Temperature Qualification

The bqSWITCHER™ continuously monitors battery temperature by measuring the voltage between the TS pin

and VSS pin. A negative temperature coefficient thermistor (NTC) and an external voltage divider typically

develop this voltage. The bqSWITCHER™ compares this voltage against its internal thresholds to determine if

charging is allowed. To initiate a charge cycle, the battery temperature must be within the V(LTF)-to-V(HTF)

thresholds. If battery temperature is outside of this range, the bqSWITCHER™ suspends charge and waits until

the battery temperature is within the V(LTF)-to-V(HTF) range. During the charge cycle (both precharge and fast

charge), the battery temperature must be within the V(LTF)-to-V(TCO) thresholds. If battery temperature is outside of

this range, the bqSWITCHER™ suspends charge and waits until the battery temperature is within the V(LTF)-to-

V(HTF) range. The bqSWITCHER™ suspends charge by turning off the PWM and holding the timer value (that is,

timers are not reset during a suspend condition). Note that the bias for the external resistor divider is provided

from the VTSB output. Applying a constant voltage between the V(LTF)-to-V(HTF) thresholds to the TS pin disables

the temperature-sensing feature.

(1)

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‘5‘ TEXAS INSTRUMENTS OCHARGE

R(SNS) +VIREG

IOCHARGE

IO(PRECHG) +

K(ISET2) V(ISET2)

ǒR(ISET2) R(SNS)Ǔ

Charge Suspend

Temperature Range

to Initiate Charge

Charge Suspend Charge Suspend

Temperature Range

During Charge Cycle

Charge Suspend

V(LTF)

V(HTF)

V(TCO)

VSS

VCC

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bq24103

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bq24104

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Feature Description (continued)

Figure 4. TS Pin Thresholds

8.3.3 Battery Preconditioning (Precharge)

On power up, if the battery voltage is below the VLOWV threshold, the bqSWITCHER™ applies a precharge

current, IPRECHG, to the battery. This feature revives deeply discharged cells. The bqSWITCHER™ activates a

safety timer, tPRECHG, during the conditioning phase. If the VLOWV threshold is not reached within the timer period,

the bqSWITCHER™ turns off the charger and enunciates FAULT on the STATx pins. In the case of a FAULT

condition, the bqSWITCHER™ reduces the current to IDETECT. IDETECT is used to detect a battery replacement

condition. Fault condition is cleared by POR or battery replacement.

The magnitude of the precharge current, IO(PRECHG), is determined by the value of programming resistor, R(ISET2),

connected to the ISET2 pin.

where

• RSNS is the external current-sense resistor

• V(ISET2) is the output voltage of the ISET2 pin

• K(ISET2) is the V/A gain factor

• V(ISET2) and K(ISET2) are specified in the Electrical Characteristics table. (2)

8.3.4 Battery Charge Current

The battery charge current, IO(CHARGE), is established by setting the external sense resistor, R(SNS), and the

resistor, R(ISET1), connected to the ISET1 pin.

In order to set the current, first choose R(SNS) based on the regulation threshold VIREG across this resistor. The

best accuracy is achieved when the VIREG is between 100mV and 200mV.

(3)

If the results is not a standard sense resistor value, choose the next larger value. Using the selected standard

value, solve for VIREG. Once the sense resistor is selected, the ISET1 resistor can be calculated using the

following equation:

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l TEXAS INSTRUMENTS R \SET1 \SET1 SNS CHARGE R2 R2 (TTC)

tCHARGE +C(TTC) K(TTC)

ITERM +

K(ISET2) VTERM

ǒR(ISET2) R(SNS)Ǔ

RCH

(R1 + R2)

V = x 50 mV

OREG IBAT

(R1 + R2)

V = x V

RISET1 +KISET1 VISET1

RSNS ICHARGE

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

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SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

Feature Description (continued)

(4)

8.3.5 Battery Voltage Regulation

The voltage regulation feedback occurs through the BAT pin. This input is tied directly to the positive side of the

battery pack. The bqSWITCHER™ monitors the battery-pack voltage between the BAT and VSS pins. The

bqSWITCHER™ is offered in a fixed single-cell voltage version (4.2 V) and as a one-cell or two-cell version

selected by the CELLS input. A low or floating input on the CELLS selects single-cell mode (4.2 V) while a high-

input through a resistor selects two-cell mode (8.4 V).

For the bq24105 and bq24115, the output regulation voltage is specified as:

(5)

where R1 and R2 are resistor divider from BAT to FB and FB to VSS, respectively.

The bq24105 and bq24115 recharge threshold voltage is specified as:

(6)

8.3.6 Charge Termination and Recharge

The bqSWITCHER™ monitors the charging current during the voltage regulation phase. Once the termination

threshold, ITERM, is detected, the bqSWITCHER™ terminates charge. The termination current level is selected by

the value of programming resistor, R(ISET2), connected to the ISET2 pin.

where

• R(SNS) is the external current-sense resistor

• VTERM is the output of the ISET2 pin

• K(ISET2) is the A/V gain factor

• VTERM and K(ISET2) are specified in the Electrical Characteristics table (7)

As a safety backup, the bqSWITCHER™ also provides a programmable charge timer. The charge time is

programmed by the value of a capacitor connected between the TTC pin and GND by the following formula:

where

• C(TTC) is the capacitor connected to the TTC pin

• K(TTC) is the multiplier (8)

A new charge cycle is initiated when one of the following conditions is detected:

• The battery voltage falls below the VRCH threshold.

• Power-on reset (POR), if battery voltage is below the VRCH threshold

• CE toggle

• TTC pin, described as follows.

To disable the charge termination and safety timer, the user can pull the TTC input below the VTTC_EN threshold.

Going above this threshold enables the termination and safety timer features and also resets the timer. Tying

TTC high disables the safety timer only.

8.3.7 Sleep Mode

The bqSWITCHER™ enters the low-power sleep mode if the VCC pin is removed from the circuit. This feature

prevents draining the battery during the absence of VCC.

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Feature Description (continued)

8.3.8 Charge Status Outputs

The open-drain STAT1 and STAT2 outputs indicate various charger operations as shown in Table 1. These

status pins can be used to drive LEDs or communicate to the host processor. Note that OFF indicates that the

open-drain transistor is turned off.

Table 1. Status Pins Summary

Charge State STAT1 STAT2

Charge-in-progress ON OFF

Charge complete OFF ON

Charge suspend, timer fault, overvoltage, sleep mode, battery absent OFF OFF

Table 2. Status Pins Summary (bq24104, bq24108 and bq24109 Only)

Charge State STAT1 STAT2

Battery absent OFF OFF

Charge-in-progress ON OFF

Charge complete OFF ON

Battery over discharge, VI(BAT) < V(SC) ON/OFF (0.5 Hz) OFF

Charge suspend (due to TS pin and internal thermal protection) ON/OFF (0.5 Hz) OFF

Precharge timer fault ON/OFF (0.5 Hz) OFF

Fast charge timer fault ON/OFF (0.5 Hz) OFF

Sleep mode OFF OFF

8.3.9 PG Output

The open-drain PG (power good) indicates when the AC-to-DC adapter (that is, VCC) is present. The output turns

on when sleep-mode exit threshold, VSLP-EXIT, is detected. This output is turned off in the sleep mode. The PG pin

can be used to drive an LED or communicate to the host processor.

8.3.10 CE Input (Charge Enable)

The CE digital input is used to disable or enable the charge process. A low-level signal on this pin enables the

charge and a high-level VCC signal disables the charge. A high-to-low transition on this pin also resets all timers

and fault conditions. Note that the CE pin cannot be pulled up to VTSB voltage. This may create power-up

issues.

8.3.11 Timer Fault Recovery

As shown in Figure 4, bqSWITCHER™ provides a recovery method to deal with timer fault conditions. The

following summarizes this method.

Condition 1 VI(BAT) above recharge threshold (VOREG - VRCH) and timeout fault occurs.

Recovery method: bqSWITCHER™ waits for the battery voltage to fall below the recharge threshold. This could

happen as a result of a load on the battery, self-discharge or battery removal. Once the battery falls below the

recharge threshold, the bqSWITCHER™ clears the fault and enters the battery absent detection routine. A POR

or CE toggle also clears the fault.

Condition 2 Charge voltage below recharge threshold (VOREG – VRCH) and timeout fault occurs

Recovery method: In this scenario, the bqSWITCHER™ applies the IDETECT current. This small current is used to

detect a battery removal condition and remains on as long as the battery voltage stays below the recharge

threshold. If the battery voltage goes above the recharge threshold, then the bqSWITCHER™ disables the

IDETECT current and executes the recovery method described in Condition 1. Once the battery falls below the

recharge threshold, the bqSWITCHER™ clears the fault and enters the battery absent detection routine. A POR

or CE toggle also clears the fault.

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SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

8.3.12 Output Overvoltage Protection (Applies to All Versions)

The bqSWITCHER™ provides a built-in overvoltage protection to protect the device and other components

against damages if the battery voltage gets too high, as when the battery is suddenly removed. When an

overvoltage condition is detected, this feature turns off the PWM and STATx pins. The fault is cleared once VIBAT

drops to the recharge threshold (VOREG – VRCH).

8.3.13 Functional Description For System-Controlled Version (bq2411x)

For applications requiring charge management under the host system control, the bqSWITCHER™ (bq2411x)

offers a number of control functions. The following section describes these functions.

8.3.14 Precharge and Fast-Charge Control

A low-level signal on the CMODE pin forces the bqSWITCHER™ to charge at the precharge rate set on the

ISET2 pin. A high-level signal forces charge at fast-charge rate as set by the ISET1 pin. If the battery reaches

the voltage regulation level, VOREG, the bqSWITCHER™ transitions to voltage regulation phase regardless of the

status of the CMODE input.

8.3.15 Charge Termination and Safety Timers

The charge timers and termination are disabled in the system-controlled versions of the bqSWITCHER™. The

host system can use the CE input to enable or disable charge. When an overvoltage condition is detected, the

charger process stops, and all power FETs are turned off.

8.3.16 Battery Detection

For applications with removable battery packs, bqSWITCHER™ provides a battery absent detection scheme to

reliably detect insertion and/or removal of battery packs.

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bq24115

l TEXAS INSTRUMENTS POH m vREM , 4r V2 / ' ' ‘\ \ \ ,/ 4» ‘ \.

Yes

BATTERY

PRESENT,

Begin Charge

No BATTERY

PRESENT,

Begin Charge

BATTERY

ABSENT

Yes

Enable

I(DETECT)

for t(DETECT)

VI(BAT)<V(LOWV)

Apply I(WAKE)

for t(WAKE)

POR or VRCH

Detection routine runs on power up

and if VBAT drops below refresh

threshold due to removing battery

or discharging battery.

VI(BAT) >

VO(REG)

-VRCH

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

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bq24113A

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SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

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Figure 5. Battery Absent Detection for bq2410x ICs only

The voltage at the BAT pin is held above the battery recharge threshold, VOREG – VRCH, by the charged battery

following fast charging. When the voltage at the BAT pin falls to the recharge threshold, either by a load on the

battery or due to battery removal, the bqSWITCHER™ begins a battery absent detection test. This test involves

enabling a detection current, IDISCHARGE1, for a period of tDISCHARGE1 and checking to see if the battery voltage is

below the short circuit threshold, VSHORT. Following this, the wake current, IWAKE is applied for a period of tWAKE

and the battery voltage is checked again to ensure that it is above the recharge threshold. The purpose of this

current is to attempt to close an open battery pack protector, if one is connected to the bqSWITCHER™.

Passing both of the discharge and charge tests indicates a battery absent fault at the STAT pins. Failure of either

test starts a new charge cycle. For the absent battery condition, typically the voltage on the BAT pin rises and

falls between 0V and VOVPthresholds indefinitely.

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l TEXAS INSTRUMENTS L

( )

WAKE WAKE

MAX _ WAKE

OREG RCH

MAX _ WAKE

I t

CV V 0 V

2 mA 0.5 s

C4.2 V 0.1 V 0 V

C 244 F

=- -

= m

DISCHRG1 DISCHRG1

MAX _ DIS

OREG SHORT

MAX _ DIS

I t

CV V

400 A 1 s

C4.2 V 2 V

C 182 F

m ´

= m

tWAKE tDISC HRG1

VOREG

2V/cell

IWAKE

-IDISCHRG1

Yes

Battery

Detected

Battery

Detected

Battery

Detected

Battery

Connected

VBAT

IBAT

tDISC HRG1

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

www.ti.com

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

Figure 6. Battery Detect Timing Diagram

8.3.16.1 Battery Detection Example

In order to detect a no battery condition during the discharge and wake tests, the maximum output capacitance

should not exceed the following:

a. Discharge (IDISCHRG1 = 400 μA, tDISCHRG1 = 1s, VSHORT = 2V)

(9)

b. Wake (IWAKE = 2 mA, tWAKE = 0.5 s, VOREG – VRCH = 4.1V)

(10)

Based on these calculations the recommended maximum output capacitance to ensure proper operation of the

battery detection scheme is 100 μF which will allow for process and temperature variations.

Figure 7 shows the battery detection scheme when a battery is inserted. Channel 3 is the output signal and

Channel 4 is the output current. The output signal switches between VOREG and GND until a battery is inserted.

Once the battery is detected, the output current increases from 0 A to 1.3 A, which is the programmed charge

current for this application.

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS TeK Run: 500 5/5 Sample m [ T ] UT Ch3 M sooms Ch4J’ 1.20A 1.00V m SOOmA m TeK Run: 500 5/5 Sample m [ T ] + 3+ i. M sooms Ch4'\. 1.20A Ch3 1.00V 3w SOOmA w

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

Figure 7. Battery Detection Waveform When a Battery is Inserted

Figure 8 shows the battery detection scheme when a battery is removed. Channel 3 is the output signal and

Channel 4 is the output current. When the battery is removed, the output signal goes up due to the stored energy

in the inductor and it crosses the VOREG – VRCH threshold. At this point the output current goes to 0 A and the IC

terminates the charge process and turns on the IDISCHG2 for tDISCHG2. This causes the output voltage to fall down

below the VOREG – VRCHG threshold triggering a Battery Absent condition and starting the battery detection

scheme.

Figure 8. Battery Detection Waveform When a Battery is Removed

8.3.17 Current Sense Amplifier

BQ241xx family offers a current sense amplifier feature that translates the charge current into a DC voltage.

Figure 9 is a block diagram of this feature.

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

CH3=InductorCurrent

CH2

10V/div

CH2

16V

CH1

200mV/div

CH3

500mA/div

CH3

0 A

CH1

0V

CH1=ISET2

CH2=OUT

t=Time=200 s/divm

ICHARGE +

VISET2 K(ISET2)

RSNS RISET2

FASTCHG

Disable

BAT

KISET2

ISET2

RISET2

RSNS

OUT

ICHARGE

SNS

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

www.ti.com

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

Figure 9. Current Sense Amplifier

The voltage on the ISET2 pin can be used to calculate the charge current. Equation 11 shows the relationship

between the ISET2 voltage and the charge current:

(11)

This feature can be used to monitor the charge current (see Figure 10) during the current regulation phase

(Fastcharge only) and the voltage regulation phase. The schematic for the application circuit for this waveform is

shown in Figure 13.

Figure 10. Current Sense Amplifier Charge Current Waveform

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

*9 TEXAS INSTRUMENTS ‘ Padc‘c \(‘(

Battery

Detect?

TS Pin

in LTF to HTF

Range? Indicate CHARGE

SUSPEND

VBAT<VLOWV Yes

VBAT<VLOWV

T30min

Expired? No

Yes

Indicate Fault

Battery

Replaced?

(Vbat < Vrch?)

Yes

FSTCHG Timer

Expired?

Suspend Charge

Indicate Charge-

In-Progress

Regulate

IPRECHG

Indicate Charge-

In-Progress

Regulate

Current or Voltage

Indicate BATTERY

ABSENT

Check for Battery

Presence

Reset and Start

T30min timer

TS pin

in LTF to TCO

range? Indicate CHARGE

SUSPEND

Suspend Charge

POR

Yes

Reset and Start

FSTCHG timer

TS Pin

in LTF to TCO

Range?

ITERM detection?

Yes

VBAT < VRCH?No Indicate DONE

Charge Complete

Yes

VBAT<VLOWV

- Fault Condition

- Enable IDETECT

Yes

TS pin

in LTF to HTF

range?

TS pin

in LTF to HTF

range?

Indicate CHARGE

SUSPEND

Suspend Charge

Indicate Charge-

In-Progress

- Turn Off Charge

- Enable IDISCHG for

tDISCHG2

Indicate BATTERY

ABSENT

Battery Removed

Yes

*NOTE: If the TTC pin is

pulled low, the safety timer

and termination are

disabled; the charger

continues to regulate, and

the STAT pins indicate

charge in progress.

If the TTC pin is pulled high

(VTSB), only the safety

timer is disabled

(termination is normal).

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

8.4 Device Functional Modes

Figure 11 shows the operational flow chart for a stand-alone charge operation.

Figure 11. Stand-Alone Version Operational Flow Chart

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

Vcc > VI(BAT)

Checked at All

CMODE=Low Yes

Yes

Indicate Charge-

In-Progress

Regulate

IO(PRECHG)

Indicate Charge-

In-Progress

Regulate Current

or Voltage

POR

Yes

/CE=High

CMODE=Low

Yes

Indicate DONE

Turn Off Charge

Indicate SLEEP

MODE

SLEEP MODE

CMODE=High

Yes

/CE=Low

Yes

/CE=Low

Yes

/CE=High

VIBAT in VREG

Yes

Times

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

www.ti.com

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

Device Functional Modes (continued)

Figure 12 shows the operational flow chart for a system-controlled charge operation.

Figure 12. System-Controlled Operational Flow Chart

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

3IN

4IN

6VCC

2STAT1

19STAT2

5PG

7 TTC

16CE

10VSS

13NC

OUT 1

OUT 20

PGND17

PGND18

SNS15

BAT 14

ISET18

ISET29

TS12

VTSB11

VIN

LOUT

CIN COUT

RSNS

0.1W

1.5KW1.5KW1.5KW

Charge

DoneAdapter

Present

7.5KW

9.31KW

442KW

RT1

103AT

Battery

Pack

Pack-

Pack+

0.1 Fm

10 Fm

10 Hm

10 Fm

BQ24100

RISET2

RISET1

RT2

CTTC

VTSB

MMBZ18VALT1

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The bqSWITCHER™ battery charger supports precision Li-ion or Li-polymer charging system for single- or two-

cell application. The design example below shows the design consideration for a 1-cell application.

9.2 Typical Application

Figure 13. Stand-Alone, 1-Cell Application

9.2.1 Design Requirements

For this design example, use the parameters listed in Table 3.

Table 3. Design Parameters

DESIGN PARAMETER EXAMPLE VALUE

AC adapter voltage (VIN) 16 V

Battery charge voltage (number of cells in series) 4.2 V (1 cell)

Battery charge current (during fast charge phase) 1.33 A

Precharge and termination current 0.133 A

Safety timer 5 hours

Inductor ripple current 30% of fast charge current (0.4 A)

Charging temperature range 0°C to 45°C

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

TEXAS INSTRUMENTS \NMAX L f X OUT (\NMA f X L iL 0282 LPK 1 1 f OUT RSNS CHARGE

RSNS +VRSNS

ICHARGE

ƒo+1

2pLOUT COUT

COUT +1

4p2 ƒo2 LOUT

COUT +1

4p2 (16 103)2 (10 10*6)

COUT +9.89 mF

ILPK +IOUT )

DIL

ILPK +1.33 )0.282

ILPK +1.471 A

DIL+

VBAT ǒVINMAX *VBATǓ

VINMAX ƒ LOUT

DIL+4.2 (16 *4.2)

16 (1.1 106) (10 10*6)

DIL+0.282 A

DIL+ICHARGE ICHARGERipple

LOUT +

VBAT ǒVINMAX *VBATǓ

VINMAX ƒ DIL

LOUT +4.2 (16 *4.2)

16 (1.1 106) (1.33 0.3)

LOUT +7.06 mH

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

www.ti.com

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

9.2.2 Detailed Design Procedure

• VIN = 16 V

• VBAT = 4.2 V (1-Cell)

• ICHARGE = 1.33 A

• IPRECHARGE = ITERM = 133 mA

• Safety Timer = 5 hours

• Inductor Ripple Current = 30% of Fast Charge Current

• Initiate Charge Temperature = 0°C to 45°C

1. Determine the inductor value (LOUT) for the specified charge current ripple:

(12)

Set the output inductor to standard 10 μH. Calculate the total ripple current with using the 10 μH inductor:

(13)

Calculate the maximum output current (peak current):

(14)

Use standard 10 μH inductor with a saturation current higher than 1.471 A. (that is, Sumida CDRH74-100)

2. Determine the output capacitor value (OUT) using 16 kHz as the resonant frequency:

(15)

Use standard value 10 μF, 25 V, X5R, ±20% ceramic capacitor (that is, Panasonic 1206 ECJ-3YB1E106M

3. Determine the sense resistor using the following equation:

(16)

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS 100 mV SNS RSNS 1SET1 1SET1 1000 X 1.0 ISET1 1SET2 1SET2 1000 X 0.1 ISET2 CHARGE 300 m TTC

CTTC +tCHARGE

KTTC

CTTC +300 m

2.6 mńnF

CTTC +115.4 nF

RISET2 +KISET2 VISET2

RSNS IPRECHARGE

RISET2 +1000 0.1

0.1 0.133

RISET2 +7.5 kW

RISET1 +KISET1 VISET1

RSNS ICHARGE

RISET1 +1000 1.0

0.1 1.33

RISET1 +7.5 kW

PRSNS +ICHARGE2 RSNS

PRSNS +1.332 0.1

PRSNS +176.9 mW

RSNS +100 mV

1.33 A

RSNS +0.075 W

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

In order to get better current regulation accuracy (±10%), let VRSNS be between 100 mV and 200 mV. Use

VRSNS = 100 mV and calculate the value for the sense resistor.

(17)

This value is not standard in resistors. If this happens, then choose the next larger value which in this case is

0.1 Ω. Using the same Equation 15 the actual VRSNS will be 133 mV. Calculate the power dissipation on the

sense resistor:

(18)

Select standard value 100 mΩ, 0.25 W 0805, 1206 or 2010 size, high precision sensing resistor. (that is.,

Vishay CRCW1210-0R10F)

4. Determine ISET 1 resistor using the following equation:

(19)

Select standard value 7.5 kΩ, 1/16W ±1% resistor (that is, Vishay CRCWD0603-7501-F)

5. Determine ISET 2 resistor using the following equation:

(20)

Select standard value 7.5 kΩ, 1/16W ±1% resistor (that is, Vishay CRCWD0603-7501-F)

6. Determine TTC capacitor (TTC) for the 5.0 hours safety timer using the following equation:

(21)

Select standard value 100 nF, 16V, X7R, ±10% ceramic capacitor (that is, Panasonic ECJ-1VB1C104K).

Using this capacitor the actual safety timer will be 4.3 hours.

7. Determine TS resistor network for an operating temperature range from 0°C to 45°C.

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS RT2 : 442 kg OUT

f0+1

2p LOUT COUT

RTHCOLD +27.28 kW

RT1 +9.31 kW

RTHHOT +4.912 kW

RT2 +442 kW

RT2=

V RTH RTH

O(VTSB) COLD HOT

´ ´ ´ 1

VLTF

VHTF

RTHHOT ´ - ´RTHCOLD

VO(VTSB)

HTF

V-1

( )

VO(VTSB)

LTF

V-1

( )

RT2

RTHCOLD

VO(VTSB)

LTF

V-1

RT1=

Where:

V =V % /100

LTF O(VTSB) LTF 100¸

V =V % /100

HTF O(VTSB) HTF 100¸

103AT

RT1

RT2

VTSB

RTH

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

www.ti.com

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

Figure 14. TS Resistor Network

Assuming a 103AT NTC Thermistor on the battery pack, determine the values for RT1 and RT2 using the

following equations:

(22)

(23)

9.2.2.1 Inductor, Capacitor, and Sense Resistor Selection Guidelines

The bqSWITCHER™ provides internal loop compensation. With this scheme, best stability occurs when LC

resonant frequency, fois approximately 16 kHz (8 kHz to 32 kHz). Use Equation 24 to calculate the value of the

output inductor and capacitor. Table 4 provides a summary of typical component values for various charge rates.

(24)

Table 4. Output Components Summary

CHARGE CURRENT 0.5 A 1 A 2 A

Output inductor, LOUT 22 μH 10 μH 4.7 μH

Output capacitor, COUT 4.7 μF 10 μF 22 μF (or 2 × 10 μF) ceramic

Sense resistor, R(SNS) 0.2 Ω0.1 Ω0.05 Ω

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

3IN

4IN

6VCC

2STAT1

19STAT2

5PG

7 TTC

16CE

10VSS

13CELLS

OUT 1

OUT 20

PGND17

PGND18

SNS15

BAT 14

ISET18

ISET29

TS12

VTSB11

VIN

CIN COUT

RSNS

0.1W

1.5KW1.5KW1.5KW

Charge

DoneAdapter

Present

7.5KW

9.31KW

442KW

RT1

103AT

Battery

Pack

Pack-

Pack+

0.1 Fm

10 Fm

10 Hm

10kW

10 Fm

BQ24103

BQ24104

RISET2

RISET1

VIN

LOUT

CTTC

RT2

VTSB

MMBZ18VALT1

(seeNote A)

I -ChargeCurrent- A

(BAT)

Efficiency-%

0.5 1 1.5 2

100

V =4.2V

(BAT)

1-Cell

V =16V

V =5V

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

9.2.3 Application Curve

Figure 15. Efficiency vs Charge Current

9.3 System Examples

Zener diode not needed for bq24103A and bq24104.

Figure 16. Stand-Alone, 2-Cell Application

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

3IN

4IN

6VCC

2STAT1

19NC

5PG

7CMODE

16CE

10VSS

13CELLS

OUT 1

OUT 20

PGND17

PGND18

SNS15

BAT 14

ISET18

ISET29

TS12

VTSB11

VIN

LOUT

CIN COUT

RSNS

0.1W

7.5KW

9.31KW

442KW

VTSB

103AT

Battery

Pack

Pack-

Pack+

0.1 Fm

10 Fm

10 Hm

10 Fm

BQ24113,

BQ24113A

RISET2

RISET1

RT1

RT2

TOHOSTCONTROLLER

MMBZ18VALT1

(seeNote A)

3IN

4IN

6VCC

2STAT1

19STAT2

5PG

7 TTC

16CE

10VSS

13FB

OUT 1

OUT 20

PGND17

PGND18

SNS15

BAT 14

ISET18

ISET29

TS12

VTSB11

VIN

CTTC

CIN COUT

RSNS

0.1W

1.5KW1.5KW1.5KW

Charge

DoneAdapter

Present

7.5KW

9.31KW

442KW

RT1

103AT

Battery

Pack

Pack-

Pack+

0.1 Fm

10 Fm

10 Hm

10 Fm

BQ24105

RISET2

RISET1

100KW

301KW

RT2

VTSB

OUT

MMBZ18VALT1

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

www.ti.com

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

System Examples (continued)

Figure 17. Stand-Alone, 2-Cell Application

Zener diode not needed for bq24113A.

Figure 18. System-Controlled Application

Figure 19 shows charging a battery and powering system without affecting battery charge and termination.

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

3IN

4IN

6VCC

2STAT1

19STAT2

5 PG

7 TTC

16 CE

10VSS

13NC

OUT 1

OUT 20

PGND17

PGND18

SNS15

BAT 14

ISET18

ISET29

TS12

VTSB11

VIN

CIN COUT

RSNS

0.1W

1.5KW1.5KW1.5KW

Charge

DoneAdapter

Present

7.5KW

9.31KW

442KW

VTSB

103AT

Battery

Pack

Pack-

Pack+

0.1 Fm

10 Fm

10 Hm

10 Fm

BQ24100

RSYS

CTTC

LOUT

MMBZ18VALT1

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

System Examples (continued)

Figure 19. Application Circuit for Charging a Battery and Powering a System

Without Affecting Termination

The bqSWITCHER™ was designed as a stand-alone battery charger but can be easily adapted to power a

system load, while considering a few minor issues.

Advantages:

1. The charger controller is based only on what current goes through the current-sense resistor (so precharge,

constant current, and termination all work well), and is not affected by the system load.

2. The input voltage has been converted to a usable system voltage with good efficiency from the input.

3. Extra external FETs are not needed to switch power source to the battery.

4. The TTC pin can be grounded to disable termination and keep the converter running and the battery fully

charged, or let the switcher terminate when the battery is full and then run off of the battery via the sense

resistor.

Other Issues:

1. If the system load current is large (≥1 A), the IR drop across the battery impedance causes the battery

voltage to drop below the refresh threshold and start a new charge. The charger would then terminate due to

low charge current. Therefore, the charger would cycle between charging and termination. If the load is

smaller, the battery would have to discharge down to the refresh threshold resulting in a much slower

cycling. Note that grounding the TTC pin keeps the converter on continuously.

2. If TTC is grounded, the battery is kept at 4.2 V (not much different than leaving a fully charged battery set

unloaded).

3. Efficiency declines 2-3% hit when discharging through the sense resistor to the system.

The following system example shows charging a battery and powering system without affecting battery charge

and termination.

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

3IN

4IN

6VCC

2STAT1

19STAT2

5PG

7 TTC

16CE

10VSS

13FB

OUT 1

OUT 20

PGND17

PGND18

SNS15

BAT 14

ISET18

ISET29

TS12

VTSB11

VIN

CTTC

CIN COUT

RSNS

0.1W

1.5KW1.5KW1.5KW

Charge

DoneAdapter

Present

7.5KW

20KW

9.31KW

442KW

RT1

103AT

Battery

Pack

Pack-

Pack+

0.1 Fm

10 Fm

10 Hm

10 Fm

BQ24105

RISET2

RISET1

200KW

143KW

RT2

VTSB

OUT

MMBZ18VALT1

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

www.ti.com

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

System Examples (continued)

Figure 20. 1-Cell LiFePO4 Application

The LiFePO4battery has many unique features such as a high thermal runaway temperature, discharge current

capability, and charge current. These special features make it attractive in many applications such as power

tools. The recommended charge voltage is 3.6 V and termination current is 50 mA. Figure 20 shows an

application circuit for charging one cell LiFePO4 using bq24105. The charge voltage is 3.6 V and recharge

voltage is 3.516 V. The fast charging current is set to 1.33 A while the termination current is 50 mA. This circuit

can be easily changed to support two or three cell applications. However, only 84 mV difference between

regulation set point and rechargeable threshold makes it frequently enter into recharge mode when small load

current is applied. This can be solved by lower down the recharge voltage threshold to 200 mV to discharge

more energy from the battery before it enters recharge mode again. See the application report, Using the

bq24105/25 to Charge LiFePO4Battery, SLUA443, for additional details. The recharge threshold should be

selected according to real application conditions.

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

10 Power Supply Recommendations

For proper operation of bqSWITCHER™, VCC and IN (tied together) must be from 4.35 V to 16 V. Power limit

for the input supply must be greater than the maximum power required for charging the battery (plus any

additional load on the output of the switch-mode converter).

11 Layout

11.1 Layout Guidelines

It is important to pay special attention to the PCB layout. The following provides some guidelines:

• To obtain optimal performance, the power input capacitors, connected from input to PGND, should be placed

as close as possible to the bqSWITCHER™. The output inductor should be placed directly above the IC and

the output capacitor connected between the inductor and PGND of the IC. The intent is to minimize the

current path loop area from the OUT pin through the LC filter and back to the GND pin. The sense resistor

should be adjacent to the junction of the inductor and output capacitor. Route the sense leads connected

across the R(SNS) back to the IC, close to each other (minimize loop area) or on top of each other on adjacent

layers (do not route the sense leads through a high-current path). Use an optional capacitor downstream from

the sense resistor if long (inductive) battery leads are used.

• Place all small-signal components (CTTC, RSET1/2 and TS) close to their respective IC pin (do not place

components such that routing interrupts power stage currents). All small control signals should be routed

away from the high current paths.

• The PCB should have a ground plane (return) connected directly to the return of all components through vias

(3 vias per capacitor for power-stage capacitors, 3 vias for the IC PGND, 1 via per capacitor for small-signal

components). A star ground design approach is typically used to keep circuit block currents isolated (high-

power/low-power small-signal) which reduces noise-coupling and ground-bounce issues. A single ground

plane for this design gives good results. With this small layout and a single ground plane, there is not a

ground-bounce issue, and having the components segregated minimizes coupling between signals.

• The high-current charge paths into IN and from the OUT pins must be sized appropriately for the maximum

charge current in order to avoid voltage drops in these traces. The PGND pins should be connected to the

ground plane to return current through the internal low-side FET. The thermal vias in the IC PowerPAD™

provide the return-path connection.

• The bqSWITCHER™ is packaged in a thermally enhanced MLP package. The package includes a thermal

pad to provide an effective thermal contact between the IC and the PCB. Full PCB design guidelines for this

package are provided in the application report entitled: QFN/SON PCB Attachment, SLUA271. Six 10-13 mil

vias are a minimum number of recommended vias, placed in the IC's power pad, connecting it to a ground

thermal plane on the opposite side of the PWB. This plane must be at the same potential as VSS and PGND

of this IC.

• See user's guide SLUU200 for an example of a good layout.

WAVEFORMS: All waveforms are taken at Lout (IC Out pin). VIN = 7.6 V and the battery was set to 2.6 V, 3.5 V,

and 4.2 V for the three waveforms. When the top switch of the converter is on, the waveform is at ~7.5 V, and

when off, the waveform is near ground. Note that the ringing on the switching edges is small. This is due to a

tight layout (minimized loop areas), a shielded inductor (closed core), and using a low-inductive scope ground

lead (that is, short with minimum loop).

Precharge: The current is low in precharge; so, the bottom synchronous FET turns off after its minimum on-time

which explains the step between ≉0 V and -0.5 V. When the bottom FET and top FET are off, the current

conducts through the body diode of the bottom FET which results in a diode drop below the ground potential.

The initial negative spike is the delay turning on the bottom FET, which is to prevent shoot-through current as the

top FET is turning off.

Fast Charge: This is captured during the constant-current phase. The two negative spikes are the result of the

short delay when switching between the top and bottom FETs. The break-before-make action prevents current

shoot-through and results in a body diode drop below ground potential during the break time.

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

TEXAS INSTRUMENTS JL . Stup M PDS: 45D.Uns CURSEIR M Pas: 43mm; CURSDR Tek : 9' Type _ _ _ Delta Delta t 320‘Uns 3mg“; ‘ 1.DETMH2 1‘067MH2 Cursor 1 L cursor 1 _____ -3?U.Dns ~43|JJJIIS 1. _ __ _______________ Cursur 2 1. Eursnr 2 _ _ Ssnrnns 430.0ns CH1 ZUW M 25""5 CH1 \ 53W CH1 2.00V M 250!“ CH1 \. 5.94V Tek CURSOR IL. . Stop 9 : M Pos: 490.0ns t Della 330.0ns Cursor 1 -55El.Elns Cursor 2 380m: 1.0?5MH: CH1 zluuv CH1 \ 5.B4\I'

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

www.ti.com

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

Layout Guidelines (continued)

Charge during Voltage Regulation and Approaching Termination: Note that this waveform, Figure 23, is similar to

the precharge waveform, Figure 21. The difference is that the battery voltage is higher so the duty cycle is

slightly higher. The bottom FET stays on longer because there is more of a current load than during precharge; it

takes longer for the inductor current to ramp down to the current threshold where the synchronous FET is

disabled.

Figure 21. Precharge Waveform Figure 22. Fast Charge Waveform

Figure 23. Voltage Regulation and Approaching Termination Waveform

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS L__1 P IN IN BAT BAT)

( ) ( )

IN IN BAT BAT

P V l V I= ´ - ´

q(JA) +TJ*TA

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

11.2 Layout Example

Figure 24. bq241xx PCB Layout

11.3 Thermal Considerations

The SWITCHER is packaged in a thermally enhanced MLP package. The package includes a thermal pad to

provide an effective thermal contact between the IC and the printed circuit board (PCB). Full PCB design

guidelines for this package are provided in the application report entitled: QFN/SON PCB Attachment, SLUA271.

The most common measure of package thermal performance is thermal impedance (θJA) measured (or modeled)

from the chip junction to the air surrounding the package surface (ambient). The mathematical expression for θJA

is:

where

• TJ= chip junction temperature

• TA= ambient temperature

• P = device power dissipation (25)

Factors that can greatly influence the measurement and calculation of θJA include:

• Whether or not the device is board mounted

• Trace size, composition, thickness, and geometry

• Orientation of the device (horizontal or vertical)

• Volume of the ambient air surrounding the device under test and airflow

• Whether other surfaces are in close proximity to the device being tested

The device power dissipation, P, is a function of the charge rate and the voltage drop across the internal power

FET. It can be calculated from the following equation:

(26)

Due to the charge profile of Li-xx batteries, the maximum power dissipation is typically seen at the beginning of

the charge cycle when the battery voltage is at its lowest. (See Figure 3).

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

www.ti.com

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

12 Device and Documentation Support

12.1 Device Support

12.1.1 Third-Party Products Disclaimer

TI'S PUBLICATION OF INFORMATION REGARDING THIRD-PARTY PRODUCTS OR SERVICES DOES NOT

CONSTITUTE AN ENDORSEMENT REGARDING THE SUITABILITY OF SUCH PRODUCTS OR SERVICES

OR A WARRANTY, REPRESENTATION OR ENDORSEMENT OF SUCH PRODUCTS OR SERVICES, EITHER

ALONE OR IN COMBINATION WITH ANY TI PRODUCT OR SERVICE.

12.2 Documentation Support

12.2.1 Related Documentation

For related documentation see the following:

• bq241xx User's Guide, SLUU200

•QFN/SON PCB Attachment, SLUA271

•Using the bq24105/25 to Charge LiFePO4Battery, SLUA443

12.3 Related Links

The table below lists quick access links. Categories include technical documents, support and community

resources, tools and software, and quick access to sample or buy.

Table 5. Related Links

TECHNICAL TOOLS & SUPPORT &

PARTS PRODUCT FOLDER SAMPLE & BUY DOCUMENTS SOFTWARE COMMUNITY

bq24100 Click here Click here Click here Click here Click here

bq24103 Click here Click here Click here Click here Click here

bq24103A Click here Click here Click here Click here Click here

bq24104 Click here Click here Click here Click here Click here

bq24105 Click here Click here Click here Click here Click here

bq24108 Click here Click here Click here Click here Click here

bq24109 Click here Click here Click here Click here Click here

bq24113 Click here Click here Click here Click here Click here

bq24113A Click here Click here Click here Click here Click here

bq24115 Click here Click here Click here Click here Click here

12.4 Community Resources

The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective

contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of

Use.

TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration

among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help

solve problems with fellow engineers.

Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and

contact information for technical support.

12.5 Trademarks

bqSWITCHER, PowerPAD, E2E are trademarks of Texas Instruments.

All other trademarks are the property of their respective owners.

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

l TEXAS INSTRUMENTS

bq24100

bq24103

bq24103A

bq24104

bq24105

bq24108

bq24109

bq24113

bq24113A

bq24115

SLUS606P –JUNE 2004–REVISED NOVEMBER 2015

www.ti.com

12.6 Electrostatic Discharge Caution

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

12.7 Glossary

SLYZ022 —TI Glossary.

This glossary lists and explains terms, acronyms, and definitions.

13 Mechanical, Packaging, and Orderable Information

The following pages include mechanical, packaging, and orderable information. This information is the most

current data available for the designated devices. This data is subject to change without notice and revision of

this document. For browser-based versions of this data sheet, refer to the left-hand navigation.

Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

I TEXAS INSTRUMENTS Samples Samples Samples Samples Samples Samples Samples Samples Samples Sample: Sample: Samples Samples Samples Samples Samples Samples Samples Samples Samples

PACKAGE OPTION ADDENDUM

www.ti.com 13-Aug-2021

Addendum-Page 1

PACKAGING INFORMATION

Orderable Device Status

(1)

Package Type Package

Drawing Pins Package

Qty Eco Plan

(2)

Lead finish/

Ball material

(6)

MSL Peak Temp

(3)

Op Temp (°C) Device Marking

(4/5)

Samples

BQ24100RHLR ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CIA

BQ24100RHLRG4 ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CIA

BQ24103ARHLR ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CKO

BQ24103ARHLRG4 ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CKO

BQ24103ARHLT ACTIVE VQFN RHL 20 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CKO

BQ24103ARHLTG4 ACTIVE VQFN RHL 20 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CKO

BQ24103RHLR ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CID

BQ24103RHLRG4 ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CID

BQ24104RHLR ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 NXW

BQ24104RHLT ACTIVE VQFN RHL 20 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 NXW

BQ24105RHLR ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CIF

BQ24105RHLRG4 ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CIF

BQ24108RHLR ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CIU

BQ24108RHLRG4 ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CIU

BQ24109RHLR ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 CDY

BQ24109RHLT ACTIVE VQFN RHL 20 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 CDY

BQ24113ARHLR ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CKF

BQ24113ARHLRG4 ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CKF

BQ24113ARHLT ACTIVE VQFN RHL 20 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CKF

BQ24113ARHLTG4 ACTIVE VQFN RHL 20 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CKF

TEXAS INSTRUMENTS Samples Sample: Sample:

PACKAGE OPTION ADDENDUM

www.ti.com 13-Aug-2021

Addendum-Page 2

Orderable Device Status

(1)

Package Type Package

Drawing Pins Package

Qty Eco Plan

(2)

Lead finish/

Ball material

(6)

MSL Peak Temp

(3)

Op Temp (°C) Device Marking

(4/5)

Samples

BQ24113RHLR ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CIJ

BQ24113RHLRG4 ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CIJ

BQ24115RHLR ACTIVE VQFN RHL 20 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 CIL

(1) The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance

do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may

reference these types of products as "Pb-Free".

RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.

Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based

flame retardants must also meet the <=1000ppm threshold requirement.

(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.

(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.

(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation

of the previous line and the two combined represent the entire Device Marking for that device.

(6) Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two

lines if the finish value exceeds the maximum column width.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information

provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and

continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.

TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

I TEXAS INSTRUMENTS

PACKAGE OPTION ADDENDUM

www.ti.com 13-Aug-2021

Addendum-Page 3

OTHER QUALIFIED VERSIONS OF BQ24105 :

•Automotive : BQ24105-Q1

NOTE: Qualified Version Definitions:

•Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects

I TEXAS INSTRUMENTS REEL DIMENSIONS TAPE DIMENSIONS Reel Dlameter Cavtty AD Dimension destgned to accommodate the component wmth Eu Dimension destgned to accommodate the componenl Iength K0 Dtmenston destgned to accommodate the component thickness 7 w Ovevau with at the earner tape i Pt PIlCh between successtve cavtty cemers f T ReelWidIh(W1) QUADRANT ASSIGNMENTS FOR PIN 1 ORIENTATION IN TAPE C) O O O C) O O O ispmckeIHuIes —> User Dtrecllnn OI Feed \I/ Pockel Quadrams

TAPE AND REEL INFORMATION

*All dimensions are nominal

Device Package

Type Package

Drawing Pins SPQ Reel

Diameter

(mm)

Reel

Width

W1 (mm)

(mm) B0

(mm) K0

(mm) P1

(mm) W

(mm) Pin1

Quadrant

BQ24100RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24103ARHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24103ARHLT VQFN RHL 20 250 180.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24103RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24104RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24104RHLT VQFN RHL 20 250 180.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24105RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24108RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24109RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.3 8.0 12.0 Q1

BQ24109RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24109RHLT VQFN RHL 20 250 180.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24109RHLT VQFN RHL 20 250 180.0 12.4 3.8 4.8 1.3 8.0 12.0 Q1

BQ24113ARHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24113ARHLT VQFN RHL 20 250 180.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24113RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24115RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1

BQ24115RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.3 8.0 12.0 Q1

PACKAGE MATERIALS INFORMATION

www.ti.com 5-Jan-2021

Pack Materials-Page 1

I TEXAS INSTRUMENTS TAPE AND REEL BOX DIMENSIONS

*All dimensions are nominal

Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)

BQ24100RHLR VQFN RHL 20 3000 367.0 367.0 35.0

BQ24103ARHLR VQFN RHL 20 3000 367.0 367.0 35.0

BQ24103ARHLT VQFN RHL 20 250 210.0 185.0 35.0

BQ24103RHLR VQFN RHL 20 3000 367.0 367.0 35.0

BQ24104RHLR VQFN RHL 20 3000 367.0 367.0 35.0

BQ24104RHLT VQFN RHL 20 250 210.0 185.0 35.0

BQ24105RHLR VQFN RHL 20 3000 367.0 367.0 35.0

BQ24108RHLR VQFN RHL 20 3000 367.0 367.0 35.0

BQ24109RHLR VQFN RHL 20 3000 367.0 367.0 38.0

BQ24109RHLR VQFN RHL 20 3000 367.0 367.0 35.0

BQ24109RHLT VQFN RHL 20 250 210.0 185.0 35.0

BQ24109RHLT VQFN RHL 20 250 195.0 200.0 45.0

BQ24113ARHLR VQFN RHL 20 3000 367.0 367.0 35.0

BQ24113ARHLT VQFN RHL 20 250 210.0 185.0 35.0

BQ24113RHLR VQFN RHL 20 3000 367.0 367.0 35.0

BQ24115RHLR VQFN RHL 20 3000 367.0 367.0 35.0

BQ24115RHLR VQFN RHL 20 3000 367.0 367.0 38.0

PACKAGE MATERIALS INFORMATION

www.ti.com 5-Jan-2021

Pack Materials-Page 2

GENERIC PACKAGE VIEW RHL 20 VQFN - 1 mm max heigm 3 5 X 4 5 mm o 5 mm pitch PLASTIC QUAD FLATPACKVNO LEAD . . , . Images above are jusl a represenlalion of the package family, aclual package may vary Refel lo the product dala sheel for package details. 4205346/L I TEXAS INSTRI IMFNTS

cccfccc Ami NOTES.

NOTES:

1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing

per ASME Y14.5M.

2. This drawing is subject to change without notice.

3. The package thermal pad must be soldered to the printed circuit board for thermal and mechanical performance.

PACKAGE OUTLINE

4219071 / A 05/2017

www.ti.com

VQFN - 1 mm max height

PLASTIC QUAD FLATPACK- NO LEAD

RHL0020A

0.08 C

0.1 C A B

0.05 C

SYMM

PIN 1 INDEX AREA

SEATING PLANE

PIN 1 ID

(OPTIONAL)

2.05±0.1

3.05±0.1

3.6

3.4

4.6

4.4

1 MAX

(0.2) TYP

2X (0.55)

3.5

14X 0.5

10 11

2X 1.5

4X (0.2)

20X 0.29

0.19

20X 0.5

0.3

T llk kl E ii

NOTES: (continued)

4. This package is designed to be soldered to a thermal pad on the board. For more information, see Texas Instruments

literature number SLUA271 (www.ti.com/lit/slua271) .

5. Solder mask tolerances between and around signal pads can vary based on board fabrication site.

6. Vias are optional depending on application, refer to device data sheet. If any vias are implemented, refer to theri

locations shown on this view. It is recommended that vias under paste be filled, plugged or tented.

EXAMPLE BOARD LAYOUT

4219071 / A 05/2017

www.ti.com

VQFN - 1 mm max height

RHL0020A

PLASTIC QUAD FLATPACK- NO LEAD

SYMM

LAND PATTERN EXAMPLE

EXPOSED METAL SHOWN

SCALE: 18X

2X (1.5)

6X (0.525)

(0.775)

(4.3)

(3.3)

20X (0.6)

20X (0.24)

14X (0.5)

(3.05)

(2.05)

(R0.05) TYP

(Ø0.2) VIA

TYP)

10 11

0.07 MAX

ALL AROUND 0.07 MIN

ALL AROUND

SOLDER MASK DETAILS

NON SOLDER MASK

DEFINED

(PREFERRED)

SOLDER MASK

DEFINED

METAL

SOLDER MASK

OPENING

SOLDER MASK

OPENING

METAL UNDER

SOLDER MASK

2X (0.75)

2X (0.4)

SOLDER MASK

OPENING

METAL UNDER

SOLDER MASK

4X (0.2)

2X (0.55)

EXPOSED METAL EXPOSED METAL

NOTES: (continued)

7. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate

design recommendations..

EXAMPLE STENCIL DESIGN

4219071 / A 05/2017

www.ti.com

VQFN - 1 mm max height

RHL0020A

PLASTIC QUAD FLATPACK- NO LEAD

SYMM

SOLDER PASTE EXAMPLE

BASED ON 0.1mm THICK STENCIL

EXPOSED PAD

75% PRINTED COVERAGE BY AREA

SCALE: 20X

(4.3)

2X (1.5)

(3.3)

(1.05)

TYP

6X (0.92)

(0.85)

14X (0.5)

20X (0.24)

20X (0.6)

(0.56)

TYP

METAL

TYP

4X (0.2)

2X (0.25)

(0.55)

TYP

SOLDER MASK EDGE

TYP

(0.775)

10 11

(R0.05) TYP

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