bq20z40-R1

www.ti.com

SLUS993A

– DECEMBER 2009 – REVISED MARCH 2011

SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK

™

TECHNOLOGY FOR USE WITH THE bq29330

Check for Samples: bq20z40-R1

1

FEATURES

APPLICATIONS

•

Notebook PCs

2

•

Next Generation Patented Impedance Track

™

Technology Accurately Measures Available

•

Medical and Test Equipment

Charge in Li-Ion and Li-Polymer Batteries

•

Portable Instrumentation

– Better Than 1% Error Over the Lifetime of

the Battery

DESCRIPTION

The bq20z40-R1 SBS-compliant gas gauge and

•

Supports the Smart Battery Specification

protection IC, incorporating patented Impedance

SBS V1.1

Track

™ technology, is designed for battery-pack or

•

Flexible Configuration for 2-Series, 3-Series,

in-system installation. The bq20z40-R1 measures

and 4-Series Cell Li-Ion and Li-Polymer

and maintains an accurate record of available charge

Batteries

in Li-Ion or Li-Polymer batteries using its integrated

•

Powerful 8-Bit RISC CPU With Ultralow Power

high-performance

analog

peripherals.

The

bq20z40-R1

monitors

capacity

change,

battery

Modes

impedance, open-circuit voltage, and other critical

•

Full Array of Programmable Protection

parameters of the battery pack, and reports the

Features

information to the system host controller over a

– Voltage, Current, and Temperature

serial-communication bus. It is designed to work with

the bq29330 analog front-end (AFE) protection IC to

•

Complies with JEITA Guidelines

maximize functionality and safety, while minimizing

•

Added Flexibility to Handle More Complex

external component count and cost in smart battery

Charging Profiles

circuits.

•

Lifetime Data Logging

The Impedance Track

™ technology continuously

•

Supports SHA-1 Authentication

analyzes the battery impedance, resulting in superior

•

Available in 20-Pin TSSOP (PW) and 32-Pin

gas-gauging accuracy. This enables the remaining

QFN (RSM) Packages

capacity

to

be

calculated

with

discharge

rate,

temperature, and cell aging, which are all accounted

for during each stage of every cycle.

Table 1. AVAILABLE OPTIONS

PACKAGE

TA

20-PIN TSSOP (PW)

20-PIN TSSOP (PW)

32-PIN QFN (RSM)

32-PIN QFN (RSM)

Tube

Tape

& Reel

Tube

Tape

& Reel

–40°C to

bq20z40-R1PW(1)

bq20z40-R1PWR(2)

bq20z40-R1RSM(1)

bq20z40-R1RSMR(2)

85

°C

(1)

A single tube quantity is 50 units.

(2)

A single reel quantity is 2000 units.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

Impedance Track is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2009–2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Not Recommended for New Designs