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,

BQ79616H-Q1, BQ79656-Q1), 14S (BQ79614-

Q1, BQ79654-Q1), and 12S (BQ79612-Q1,

BQ79652-Q1)

– Standalone monitor 48 V system (BQ75614-

Q1)

? Built-in redundancy path for voltage and

temperature 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

? 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

3 Description

BQ79612-Q1, BQ79614-Q1, BQ79616-Q1 and

BQ79616H-Q1 provide high-accuracy cell voltage

measurements in less than 200 μs for 12S, 14S

and 16S battery modules in high-voltage battery

management systems in HEV/EV. The family of

monitors 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. The integrated

front-end filters enable the system to implement

with simple, low voltage rating, differential RC

filters on the cell input channels. The integrated,

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

voltage measurements for better state of charge

(SOC) calculation. This device supports autonomous

internal cell balancing with temperature monitoring

to auto-pause and resume balancing to avoid an

overtemperature condition.