bq20z655-R1

www.ti.com

SLUSAN9

– AUGUST 2011

SBS 1.1-COMPLIANT GAS GAUGE AND PROTECTION

ENABLED WITH IMPEDANCE TRACK

™

Check for Samples: bq20z655-R1

1

FEATURES

APPLICATIONS

2

•

Next Generation Patented Impedance Track

™

•

Medical and Test Equipment

Technology Accurately Measures Available

•

Portable Instrumentation

Charge in Li-Ion and Li-Polymer Batteries

•

Rechargeable Battery Packs

– Better Than 1% Error Over the Lifetime of

•

Industrial Equipment

the Battery

•

Supports the Smart Battery Specification

DESCRIPTION

SBS V1.1

The bq20z655-R1 SBS-compliant gas gauge and

•

Flexible Configuration for 2-Series to 4-Series

protection IC, incorporating patented Impedance

Track

™ technology, is a single IC solution designed

Li-Ion and Li-Polymer Cells

for

battery-pack

or

in-system

installation.

The

•

Powerful 8-Bit RISC CPU with Ultralow Power

bq20z655-R1 measures and maintains an accurate

Modes

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

•

Charge Enable (CE) Affects the Normal

batteries

using

its

integrated

high-performance

Operation on the Charge FET when the Battery

analog

peripherals.

The

bq20z655-R1

monitors

Is in Charge/Relax Mode

capacity change, battery impedance, open-circuit

voltage, and other critical parameters of the battery

•

Full Array of Programmable Protection

pack which reports the information to the system host

Features

controller over a serial-communication bus. Together

– Voltage, Current, and Temperature

with

the

integrated

analog

front-end

(AFE)

•

Satisfies JEITA Guidelines

short-circuit

and

overload

protection,

the

bq20z655-R1 maximizes functionality and safety

•

Added Flexibility to Handle More Complex

while minimizing external component count, cost, and

Charging Profiles

size in smart battery circuits.

•

Lifetime Data Logging

The implemented Impedance Track

™ gas gauging

•

Drives 3, 4, or 5 Segment Liquid Crystal

technology

continuously

analyzes

the

battery

Display and LED for Battery-Pack Conditions

impedance,

resulting

in

superior

gas-gauging

•

Supports SHA-1 Authentication

accuracy. This enables remaining capacity to be

calculated with discharge rate, temperature, and cell

•

Complete Battery Protection and Gas Gauge

aging all accounted for during each stage of every

Solution in One Package

cycle with high accuracy.

•

Available in a 44-Pin TSSOP (DBT) Package

Table 1. 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 40 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

© 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.