BQ75614-Q1 14-S Automotive Precision Battery Monitor, Balancer, and Integrated Protector

Product Highlights > BQ75614-Q1 14-S Automotive Precision Battery Monitor, Balancer, and Integrated Protector

            BQ75614-Q1 14-S Automotive Precision Battery Monitor, Balancer, and Integrated Protector
                    Texas Instruments' protector offers integrated current sense and ASIL-D compliance
    

Image of Texas Instruments' BQ75614-Q1 14-S Automotive Precision Battery Monitor, Balancer, and Integrated Protector Texas Instruments' BQ75614-Q1 device provides high-accuracy cell voltage measurements of up to 16S battery modules in less than 200 µs while supporting shunt-resistor current-sense measurement. The integrated front-end filters enable the system to implement simple, low-voltage rated differential RC filters on the cell input channels. The integrated, post-ADC low-pass filters enable filtered, DC-like voltage measurements.

This device supports integrated current-sensing capabilities with the option to synchronize with cell voltage measurements for better state of charge (SOC) calculations. The device supports autonomous internal cell balancing with temperature monitoring to auto-pause and resume balancing to avoid an overtemperature condition.

Features

Qualified for automotive applications
AEC-Q100 qualified with the following results:
- Ambient operating temperature range Grade 1: -40°C to +125°C
- Device HBM ESD classification Level 2
- Device CDM ESD classification Level C4B
Functional safety-compliant:
- Developed for functional safety applications
- Documentation to aid ISO 26262 system design
- Systematic capability up to ASIL D
- Hardware capability up to ASIL D
ADC accuracy: ±1.5 mV
Pin-package and software compatible:
- Stackable monitor 14
- Standalone monitor 48 V system
Built-in SPI master

Supports current-sense measurement
Direct support on fuse and relay open and close diagnostics
Built-in redundancy path for voltage, temperature, and current diagnostics
Highly accurate cell voltage measurements within 128 µs for the cell channels
Integrated post-ADC configurable digital low-pass filters
Built-in host-controlled hardware reset to emulate POR-like device reset
Supports internal cell balancing:
- Balancing current: 240 mA
- Built-in balancing thermal management with automatic pause and resume control
5 V LDO output to power external digital isolator
UART host interface

Applications

Automotive 48 V Li-Ion battery systems

E-bikes and e-scooters