bq20z40-R1

www.ti.com

SLUS993 – DECEMBER 2009

SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™

TECHNOLOGY FOR USE WITH THE bq29330

Check for Samples :bq20z40-R1

1

FEATURES

DESCRIPTION

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•

Next Generation Patented Impedance Track™

Technology Accurately Measures Available

The bq20z40-R1 SBS-compliant gas gauge and

Charge in Li-Ion and Li-Polymer Batteries

protection IC, incorporating patented Impedance

Track™ technology, is designed for battery-pack or

–

Better Than 1% Error Over the Lifetime of

in-system installation. The bq20z40-R1 measures

the Battery

and maintains an accurate record of available charge

•

Supports the Smart Battery Specification

in Li-ion or Li-polymer batteries using its integrated

SBS V1.1

high-performance

analog

peripherals.

The

•

Flexible Configuration for 2 to 4 Series Li-Ion

bq20z40-R1

monitors

capacity

change,

battery

impedance, open-circuit voltage, and other critical

and Li-Polymer Cells

parameters of the battery pack, and reports the

•

Powerful 8-Bit RISC CPU With Ultralow Power

information to the system host controller over a

Modes

serial-communication bus. It is designed to work with

•

Full Array of Programmable Protection

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

Features

maximizes functionality and safety while minimizing

external component count and cost in smart battery

–

Voltage, Current, and Temperature

circuits.

•

Satisfies JEITA Guidelines

The Impedance Track™ technology continuously

•

Added Flexibility to Handle More Complex

analyzes the battery impedance, resulting in superior

Charging Profiles

gas-gauging accuracy. This enables the remaining

•

Lifetime Data Logging

capacity

to

be

calculated

with

discharge

rate,

•

Supports SHA-1 Authentication

temperature, and cell aging that are all accounted for

during each stage of every cycle.

•

Available in a 20-Pin TSSOP (PW) package

APPLICATIONS

•

Notebook PCs

•

Medical and Test Equipment

•

Portable Instrumentation

Table 1. AVAILABLE OPTIONS

PACKAGE

20-PIN TSSOP (PW) Tube

20-PIN TSSOP (PW) Tape & Reel

–40°C to 85°C

(1)

A single tube quantity is 50 units.

(2)

A single reel quantity is 2000 units

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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.

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Impedance Track is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009, 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.