1

FEATURES

DESCRIPTION

APPLICATIONS

bq20z95

SLUS757 – JULY 2007

www.ti.com

SBS 1.1-COMPLIANT GAS GAUGE and PROTECTION ENABLED WITH IMPEDANCE

TRACK™

2

• Next Generation Patented Impedance Track™

Technology Accurately Measures Available

The

bq20z95

SBS-compliant

gas

gauge

and

Charge in Li-Ion and Li-Polymer Batteries

protection IC is a single IC solution designed for

battery-pack or in-system installation. The bq20z95

–

Better Than 1% Error Over Lifetime of the

measures and maintains an accurate record of

Battery

available charge in Li-ion or Li-polymer batteries

• Supports the Smart Battery Specification

using

its

integrated

high-performance

analog

SBS V1.1

peripherals,

monitors

capacity

change,

battery

• Flexible Configuration for 2 to 4 Series Li-Ion

impedance, open-circuit voltage, and other critical

parameters of the battery pack as well and reports

and Li-Polymer Cells

the information to the system host controller over a

• Powerful 8-Bit RISC CPU With Ultra-Low

serial-communication

bus.

Together

with

the

Power Modes

integrated analog front-end (AFE) short-circuit and

• Full Array of Programmable Protection

overload

protection,

the

bq20z95

maximizes

Features

functionality and safety while minimizing external

component count, cost, and size in smart battery

–

Voltage, Current, and Temperature

circuits.

• Supports SHA-1 Authentication

The implemented Impedance Track™ gas gauging

• Complete Battery Protection and Gas Gauge

technology

continuously

analyzes

the

battery

Solution in one Package

impedance,

resulting

in

superior

gas-gauging

• Small 44-Pin TSSOP (DBT) package

accuracy. This enables remaining capacity to be

calculated with discharge rate, temperature, and cell

aging all accounted for during each stage of every

cycle with high accuracy.

• Notebook PCs

• Medical and Test Equipment

• Portable Instrumentation

AVAILABLE OPTIONS

44-PIN TSSOP (DBT) Tube

44-PIN TSSOP (DBT) Tape and Reel

–40

°C to 85°C

(1)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

website at www.ti.com.

(2)

A single tube quantity is 50 units.

(3)

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 © 2007, 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.