bq20z45-R1

www.ti.com

SLUS992 – DECEMBER 2009

SBS 1.1-Compliant Gas Gauge and Protection Enabled With Impedance Track™

Check for Samples: bq20z45-R1

1

FEATURES

DESCRIPTION

2

•

Next Generation Patented Impedance Track™

Technology Accurately Measures Available

The bq20z45-R1 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

–

Better Than 1% Error Over the Lifetime of

bq20z45-R1 measures and maintains an accurate

the Battery

record of available charge in Li-ion or Li-polymer

•

Supports the Smart Battery Specification

batteries

using

its

integrated

high-performance

SBS V1.1

analog 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 Ultralow Power

serial-communication

bus.

Together

with

the

Modes

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

•

Full Array of Programmable Protection

overload

protection,

the

bq20z45-R1

maximizes

Features

functionality and safety while minimizing external

component count, cost, and size in smart battery

–

Voltage, Current, and Temperature

circuits.

•

Satisfies JEITA Guidelines

The implemented Impedance Track™ gas gauging

•

Added Flexibility to Handle More Complex

technology

continuously

analyzes

the

battery

Charging Profiles

impedance,

resulting

in

superior

gas-gauging

•

Lifetime Data Logging

accuracy. This enables remaining capacity to be

•

Supports SHA-1 Authentication

calculated with discharge rate, temperature, and cell

aging all accounted for during each stage of every

•

Complete Battery Protection and Gas Gauge

cycle with high accuracy.

Solution in One Package

•

Available in a 38-Pin TSSOP (DBT) package

APPLICATIONS

•

Notebook PCs

•

Medical and Test Equipment

•

Portable Instrumentation

Table 1. AVAILABLE OPTIONS

38-PIN TSSOP (DBT) Tube

38-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 © 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.

Not Recommended For New Designs