BQ79758-Q1中文资料符合 ASIL-D 标准且具有电流检测功能的汽车级 18 节串联电池监测器和平衡器数据手册TI规格书

描述 Description

The BQ79758-Q1 provides high-accuracy cell voltage measurements for up to 18S battery modules in high-voltage battery management systems in xEV/EV. The monitor offers different channel options in the same package type, providing pin-to-pin compatibility and supporting high reuse of the established software and hardware across any platform. This device has a state-of-the-art ADC architecture/measurement system meeting stringent automotive standard and safety requirements. With the daisy-chain isolated by transformer (or capacitor), the device is suitable for centralized or distributed architectures in xEV powertrain.

特性 Features

AEC-Q100 qualified with the following results:

Device temperature grade 1: –40°C to +125°C ambient operating temperature range



Functional Safety-Compliant

Documentation to aid ISO 26262 system design

Systematic capability up to ASIL D

Hardware capability up to ASIL D



Measure 9 to 18 batteries in series per device, stackable up to 64 devices

Dedicated ADC with typical ±1mV accuracy

Two independent Current Sense ADCs with ±0.1% gain error drift and input range +/-275mV.

Programmable Over Current Detection comparators

Support limp home mode with full redundancy

Integrated post-ADC configurable digital low-pass filters

Supports busbar without affecting measurement accuracy

10 GPIOs for temp sensor/analog/digital/I2C controller/SPI controller

Internal cell balancing

Balancing at 300mA

User controlled PWM adjustment cell balancing current

Built-in balancing thermal management with automatic pause and resume control



Robust daisy chain communication and support Ring Architecture

Hardware reset by host simulates POR-like event without battery removal

On chip memory for one time custom programming

Low power mode current <6µA

Compatible with BQ79600-Q1 with SPI/UART interface