1 Features

• AEC-Q100 qualified –40°C to +125°C

• Functional safety compliant

– Documentation to aid ISO 26262 system design

– Systematic capability up to ASIL D

– Hardware capability up to ASIL D

• 17 single-ended voltage channels

– High voltage pack, link, charge measurement

accuracy update to 0.2%

– Pack and cell sync to 64uS

• 15 GPIO inputs as IO, I2C, SPI, ADC and temp

sense

• Dedicated MOSFET switch drive pins

• Intelligent SPI contoller HUB

– Support multiple SPI peripheral devices

– HW pin to trigger contactor drivers and Pyro

Fuse drivers

• Stackable and register map compatible with

BQ7971x-Q1 cell monitors

2 Applications

• Full Electric, Plug-In Hybrid, Hybrid Vehicles

3 Description

The device can be used to measure divided down

high voltage nodes in a battery system. It can

measure voltage across Fuse, Contactors and check

isolation voltage in battery junction box (BJB) system.

There are 15 GPIOs/auxiliary inputs that can be used

for HV measurements, thermistor measurements and

driving relays. There are 4 SW outputs that can be

used to drive MOSFET switches in the measurement

path. The device can function as a SPI HUB and

interface with up to 8 separate SPI devices/groups.

The isolated bi-directional daisy chain ports support

both capacitor and transformer based isolation. The

device can also communicate with MCU over SPI and

UART.