1

FEATURES

APPLICATIONS

DESCRIPTION

TYPICAL APPLICATION

HostSystem

PACK-

Single-CellLi-ion

BatteryPack

CHG

DSG

Temp

Sense

Battery

Good

Current

Sense

T

PACK+

Voltage

Sense

Battery

Low

Warning

FETs

I C

2

LDO

REG25

REGIN

VCC

DATA

bq27510

Power

Management

Controller

PROTECTION

IC

bq27510-G1

System-Side Impedance Track™ Fuel Gauge With Direct Battery Connection

• Smartphones

23

• Battery Fuel Gauge for 1-Series Li-Ion

Applications

• PDAs

• Digital Still and Video Cameras

• Resides on System Main Board

• Handheld Terminals

–

Works with Embedded or Removable

• MP3 or Multimedia Players

Battery Packs

–

Uses PACK+, PACK–, and T Battery

Terminals

–

Can be Powered Directly From Battery Pack

The Texas Instruments bq27510 system-side Li-Ion

battery fuel gauge is a microcontroller peripheral that

(no LDO required)

provides fuel gauging for single-cell Li-Ion battery

• Microcontroller Peripheral Provides:

packs.

The

device

requires

little

system

–

Accurate Battery Fuel Gauging

microcontroller firmware development. The bq27510

resides on the system’s main board and manages an

–

Battery Low Interrupt Warning

embedded battery (non-removable) or a removable

–

Battery Insertion Indicator

battery pack.

–

96 Bytes of Non-Volatile Scratch Pad

The bq27510 uses the patented Impedance Track™

FLASH

algorithm for fuel gauging, and provides information

• Battery Fuel Gauging Based on Patented

such

as

remaining

battery

capacity

(mAh),

Impedance Track™ Technology

state-of-charge (%), run-time to empty (min.), battery

–

Models Battery Discharge Curve for

voltage (mV), and temperature (°C).

Accurate Time-To-Empty Predictions

Battery fuel gauging with the bq27510 requires only

–

Automatically Adjusts for Battery Aging,

PACK+ (P+), PACK– (P–), and Thermistor (T)

Battery Self-Discharge, and

connections

to

a

removable

battery

pack

or

Temperature/Rate Inefficiencies

embedded battery.

–

Low-Value Sense Resistor (10 m

Ω or less)

Microcontroller Port

• Small 12-pin 2,5 mm × 4 mm SON Package

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.

3

I2C is a trademark of Phillips Corporation.

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