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Texas Instruments BQ756506-Q1 Automotive 6S Battery Monitor

Texas Instruments BQ756506-Q1 Automotive 6S Precision Battery Monitor features high-accuracy cell voltage measurements up to 6S battery modules. The device provides these measurements in less than 200µs while also supporting a shunt-resistor current sense measurement. The integrated front-end filters permit the system to implement simple, low voltage rated, differential RC filters on the cell input channels. Furthermore, the integrated, post-ADC, low-pass filters deliver filtered, DC-like voltage measurements.

The TI BQ756506-Q1 Automotive 6S Battery Monitor offers integrated current sensing capabilities with an option to synchronize with cell voltage measurements for a better state of charge (SOC) calculation.

The device also supports integrated current sensing capabilities with an option to synchronize with cell voltage measurements for a better state of charge (SOC) calculation. The BQ756506-Q1 sustains autonomous internal cell balancing with temperature monitoring to auto-pause and resume balancing, avoiding an overtemperature condition.

Features

Qualified for automotive applications
AEC-Q100 Qualified with the following results:
- Device temperature grade 1: –40°C to +125°C ambient operating temperature range
- 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
±1.5mV ADC accuracy
Pin-package and software compatible device family:
- Stackable monitor 16S (BQ79616-Q1, BQ79656-Q1), 14S (BQ79614-Q1, BQ79654- Q1), and 12S (BQ79612-Q1, BQ79652-Q1)
- Standalone monitor 48V system (BQ75614-Q1)

Supports current-sense measurement
Supports fuse and relay open and close diagnostics
Built-in redundancy path for voltage and temperature and current diagnostics
Highly accurate cell voltage measurements within 128µs for all 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 at 240mA
- Built-in balancing thermal management with automatic pause and resume control
5V LDO output to power external digital isolator
UART host interface
Built-in SPI controller

Applications

Automotive 12V Li-ion battery systems
E-bikes, E-scooters

Texas Instruments BQ756506-Q1 Automotive 6S Battery Monitor

Features

Applications

Simplified Sytem Diagram

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