bq26220

SLUS521B − AUGUST 2002 − REVISED FEBRUARY 2004

HIGHPERFORMANCE BATTERY MONITOR IC

WITH COULOMB COUNTER, VOLTAGE AND, TEMPERATURE MEASUREMENT

1

www.ti.com

FEATURES

Designed to Work With an Intelligent Host

Controller :

− Provides State of Charge Information for

Rechargeable Batteries

− Provides Accurate Battery Voltage and

Temperature Measurement

Discharge Current Integration With

Automatic Offset Compensation

Battery Voltage With Gain and Offset

Correction

Shadow Flash)

Need for an External Thermistor

External Crystal Oscillator

− Operating : 30

µA

− Sleep: 1

µA

− Hibernate: 600 nA

DESCRIPTION

The bq26220 is an advanced battery monitoring

device designed to accurately measure the

charge and discharge currents in rechargeable

battery packs. Intended for pack integration, the

bq26220 contains all the necessary functions to

form the basis of a comprehensive battery

capacity

management

system

in

portable

applications such as cellular phones, PDA’s, or

other portable products.

The bq26220 works with the host controller in the

portable

system

to

implement

the

battery

management system. The host controller is

responsible for interpreting the bq26220 data and

communicating meaningful battery data to the

end-user or power management system.

This device provides 64 bytes of general-purpose

flash memory, 8 bytes of ID ROM and 32 bytes of

flash-backed

RAM

for

data

storage.

The

nonvolatile memory can maintain formatted

battery monitor information, identification codes,

warranty information, or other critical battery

parameters during periods when the battery is

temporarily shorted or deeply discharged.

1

2

3

4

8

7

6

5

RBI

VCC

VSS

HDQ

GPIO

SRP

SRN

BAT

PW PACKAGE

(TOP VIEW)

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright

 2002, Texas Instruments Incorporated

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.