1 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

• ±1.5-mV 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 48-V 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

128 μs 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 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

• Built-in SPI controller

2 Applications

• Automotive 12-V Li-ion battery systems

• E-bikes, E-scooters

3 Description

The BQ756506-Q1 device provides high-accuracy cell

voltage measurements up to 6S battery modules in

less than 200 μs while this device also supports

shunt-resistor current sense measurement. The

integrated front-end filters enable the system to

implement with 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 also supports

integrated current sensing capabilities with an option

to synchronize with cell voltage measurements for

better state of charge (SOC) calculation. The device

supports autonomous internal cell balancing with

temperature monitoring to auto-pause and resume

balancing to avoid an overtemperature condition.