Device Description; Overview; Bq769142 Device Versions - Texas Instruments BQ769142 Manual

High accuracy battery monitor and protector for liion, li-polymer, and lifepo4 battery packs

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8 Device Description

The BQ769142 device is a highly integrated, accurate battery monitor and protector for 3-series to 14-series Li-

ion, Li-polymer, and LiFePO

accuracy provides data for host-based algorithms and control. A feature-rich and highly configurable protection

subsystem provides a wide set of protections that can be triggered and recovered completely autonomously by

the device or under full control of a host processor. The integrated charge pump with high-side protection NFET

drivers enables host communication with the device even when FETs are off by preserving the ground

connection to the pack. Dual-programmable LDOs are included for external system use, with each independently

programmable to voltages of 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V, capable of providing up to 45 mA each.

The BQ769142 device includes one-time-programmable (OTP) memory for customers to setup device operation

on their own production line. Multiple communications interfaces are supported, including 400-kHz I

HDQ one-wire standards. Multiple digital control and status data are available through several multifunction pins

on the device, including an interrupt to the host processor, and independent controls for host override of each

high-side protection NFET. Three dedicated pins are provided for temperature measurement using external

thermistors, and multifunction pins can be programmed to use for additional thermistors, supporting a total of up

to nine thermistors, in addition to an internal die temperature measurement.

The BQ769142 device family may include versions with differing default settings programmed during factory test.

These different settings, which may include having a different default communications interface or a different

setting for the REG1 LDO, will be described in the

battery packs. A high accuracy voltage, current, and temperature measurement

Device Comparison

Product Folder Links:

SLUSE91A – SEPTEMBER 2020 – REVISED FEBRUARY 2021

Table.

BQ769142

C, SPI, and

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