BQ28Z610-R1 Impedance Track™ Gas Gauge and Protection Solution

for 1-Series to 2-Series Cell Li-Ion Battery Packs

1 Features

• Autonomous battery charging control, using a

dedicated MASTER mode I2C interface

• Cell balancing with an internal bypass to optimize

battery health

• A high-side protection N-CH FET drive enables

serial bus communication during fault conditions

• Programmable protection levels for voltage,

current, and temperature

• Analog front-end with two independent ADCs

– Support for simultaneous current and voltage

sampling

– High-accuracy coulomb counter with input

offset error < 1 µV (typical)

• Supports down to 1-mΩ current sense resistor

while capable of 1-mA current measurement

• Supports battery trip point (BTP) function for

Windows® integration

• SHA-1 authentication responder for increased

battery pack security

• 400-kHz I2C bus communications interface for

high-speed programming and data access

• Compact 12-pin VSON package (DRZ)

2 Applications

• Tablet computing

• Portable and wearable health devices

• Portable audio devices

– Wireless (Bluetooth®) speakers

3 Description

The Texas Instruments BQ28Z610-R1 device is

a highly integrated, accurate, 1-series to 2-series

cell gas gauge and protection solution, providing

autonomous charger control and cell balancing.

The BQ28Z610-R1 device enables autonomous

charge control through Master Mode I2C broadcasts

of

charging

current

and

voltage

information,

eliminating software overhead that is typically incurred

by the system's host controller.

The BQ28Z610-R1 device provides a fully integrated

pack-based solution with a flash programmable

custom reduced instruction-set CPU (RISC), safety

protection, and authentication for 1- to 2-series cell

Li-ion and Li-polymer battery packs.

The BQ28Z610-R1 gas gauge communicates via

an I2C compatible interface and combines an

ultra-low-power, high-speed TI BQBMP processor,

high-accuracy

analog

measurement

capabilities,

integrated flash memory, an array of peripheral

and communication ports, an N-CH FET drive, and

a SHA-1 Authentication transform responder into

a complete, high-performance battery management

solution.

Device Information

PART NUMBER(1)

PACKAGE

BODY SIZE (NOM)

BQ28Z610-R1

VSON (12)

4 mm × 2.5 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

4

5

6

7

8

11

12

PBI

VC2

VC1

SRN

SRP

VSS

TS1

SCL

SDA

PACK

3

2

1

9

10

CHG

DSG

100

100

MM3Z5V6C

100

100

10k

0.1 µF

1 µF

0.1 µF

2.2 µF

100

5

5.1 k

5.1 k

10 M

10 M

10

100

100

1 to 10 mΩ

Fuse

1 s

2 s

PWPD

13

MM3Z5V6C

Pack+

Pack–

Comm

Bus

Battery

cells

Copyright © 2016, Texas Instruments Incorporated

Simplified Schematic

Battery

Gauge

Charger

Boost Converter

MCU

Audio

Power Amp

Audio Processor

Pack Side

System Side

2

I C

Power

Copyright © 2017, Texas Instruments Incorporated

Wireless (Bluetooth®) Speaker Application

Block Diagram

BQ28Z610-R1

SLUSE07B – JANUARY 2020 – REVISED JANUARY 2022

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.