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

? +/- 1.5mV 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 48 V system (BQ75614-

Q1)

? Supports current-sense measurement

? 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

? Supports bus bar connection and measurement

? 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

? Isolated differential daisy chain communication

with optional ring architecture

? Embedded fault signal and heartbeat through

communication line

? 5 V LDO output to power external digital isolator

? UART/SPI host interface/communication bridge

device BQ79600-Q1

? Built-in SPI master

2 Applications

? Battery Management System (BMS) in hybrid and

electric powertrain systems

? Energy storage battery packs with Battery

Management Systems

? E-bikes, E-Scooters

3 Description

The BQ7965x-Q1 family of devices provides highaccuracy

cell voltage measurements for a minimum

of 6S to a maximum of 12S (BQ79652-Q1),

14S (BQ79654-Q1), or 16S (BQ79656-Q1) battery

modules in less than 200 μs while these devices also

support shunt-resistor current sense measurement.

The integrated front-end filters enable the system to

implement with simple, low voltage raring, differential

RC filters on the cell input channels. The integrated,

post-ADC, low-pass filters enable filtered, DC-like,

voltage measurements. This family of devices also

supports integrated current sensing capabilities with

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.