BQ40Z50-R2 1-Series, 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager

1 Features

• Fully integrated 1-series, 2-series, 3-series, and

4-series Li-ion or Li-polymer cell battery pack

manager and protection

• Next-generation patented Impedance Track™

technology accurately measures available charge

in Li-ion and Li-polymer batteries

• High-side N-CH protection FET drive

• Integrated cell balancing while charging or at rest

• Suitable for batteries between 100 mAh and 29 Ah

• Full array of programmable protection features

– Voltage

– Current

– Temperature

– Charge timeout

– CHG/DSG FETs

– AFE

• Sophisticated charge algorithms

– JEITA

– Enhanced charging

– Adaptive charging

– Cell balancing

• Supports TURBO Mode 2.0

• Supports battery trip point (BTP)

• Diagnostic lifetime data monitor and black box

recorder

• LED display

• Supports two-wire SMBus v1.1 interface

• SHA-1 authentication

• IATA support

• Compact package: 32-lead QFN (RSM)

2 Applications

• Tablets

• Drones

• UPS/battery backup systems

• Medical equipment

• Handheld vacuum cleaners and vacuum robots

3 Description

The BQ40Z50-R2 device, incorporating patented

Impedance Track™ technology, is a fully integrated,

single-chip, pack-based solution that provides a rich

array of features for gas gauging, protection, and

authentication for 1-series, 2-series, 3-series, and 4-

series cell Li-ion and Li-polymer battery packs.

Using

its

integrated

high-performance

analog

peripherals, the BQ40Z50-R2 device measures and

maintains an accurate record of available capacity,

voltage, current, temperature, and other critical

parameters in Li-ion or Li-polymer batteries, and

reports this information to the system host controller

over an SMBus v1.1 compatible interface.

Device Information

PART NUMBER

PACKAGE

BODY SIZE (NOM)

BQ40Z50-R2

VQFN (32)

4.00 mm × 4.00 mm

BAT

VC

4

VC3

VC2

VC1

VSS

SRN

SRP

PACK+

PACK–

PRES

SMBC

SMBD

SMBD

SMBC

PBI

TS1 TS2

LEDCNTLA

LEDCNTLB

DISP

LEDCNTLC

TS3 TS4 BTP

BTP

VC1

VC2

VC3

OUT

VDD

GND

Cell 1

Cell 2

Cell 3

PRES

Copyright © 2017, Texas Instruments Incorporated

Simplified Schematic

www.ti.com

BQ40Z50-R2

SLUSCS4C – JUNE 2017 – REVISED APRIL 2021

Copyright © 2021 Texas Instruments Incorporated

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BQ40Z50-R2

SLUSCS4C – JUNE 2017 – REVISED APRIL 2021

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.