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BQ25887 Battery Charger with Cell Balancing
Texas Instruments' 2 A boost switch-mode battery charge management devices are ideal for portable devices
Texas Instruments' BQ25887 is a highly-integrated 2 A boost switch-mode battery charge management device for 2-cell (2s) Li-Ion and Li-polymer batteries. The BQ25887 has I2C control with cell balancing, no OTG, and no power-path.
Features
- High-efficiency 2 A, 1.5 MHz switch-mode boost charger:
- 93.4% charge efficiency at 5 V adapter, 7.6 V battery, and 1 A charge
- Optimized for USB input and 2s Li-Ion batteries
- Selectable low-power PFM mode for light-load operations
- Single input to support USB input adapters:
- Supports 3.9 V to 6.2 V input voltage range with 20 V absolute maximum input voltage rating
- Input current limit (500 mA to 3.3 A with 100 mA resolution) to support USB2.0 and USB3.0 standard adapters
- Max power tracking by input voltage limit up to 5.5 V
- Cell balancing and I2C control:
- Integrated FETs for balancing current up to 400 mA
- Automatic cell balancing with a default register setting
- Input current optimizer (ICO) to maximize input power without overloading the adapters
- Integrated 16-bit ADC for system monitoring (BUS voltage and current, each cell voltage, charge current, and NTC and die temperature)
- High integration includes all MOSFETs, current-sensing, and loop compensation
- High accuracy:
- Charge voltage regulation: ±0.5%
- Charge current regulation: ±5%
- Input current regulation: ±7.5%
- Safety:
- Battery temperature sensing in charge
- Thermal regulation and thermal shutdown
Applications
- E-cigarettes
- Drone payload controls
BQ25887 Battery Chargers with Cell Balancing
| Image | Manufacturer Part Number | Description | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|
 |  | BQ25887RGER | IC BAT BALANCER LI-ION 2C 24VQFN | 9351 - Immediate | $41.16 | View Details |
| | BQ25887RGET | IC BAT BALANCER LI-ION 2C 24VQFN | 242 - Immediate | $48.49 | View Details |
Evaluation Boards
| Image | Manufacturer Part Number | Description | Function | Embedded | Utilized IC / Part | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|---|---|---|
|  | EV2400 | EVAL BOARD FOR MSP430F5529 | USB 2.0 to SMBus Bridge | Yes, MCU, 16-Bit | MSP430F5529 | 344 - Immediate | $1,965.80 | View Details |
|  | BQ25887EVM | EVAL BOARD FOR BQ25887 | Battery Charger | - | BQ25887 | 3 - Immediate | $977.96 | View Details |
Published: 2019-07-11
Hong Kong, China