1FEATURES

23• Battery Fuel Gauge for 1-Series LiCoO2 battery

Applications

• Easy to Configure Battery Fuel Gauging Based

on Patented Impedance Track™ Technology

– Models Battery Discharge Curve for

Accurate State-of-Charge Report

– Automatically Adjusts for Battery Aging,

Battery Self-Discharge, and

Temperature/Rate Inefficiencies

– Low-Value Integrated Sense Resistor

(10 mΩ typical)

• Resides on System Main Board

– Works with Embedded or Removable

Battery Packs

– Integrated LDO allows devices to be

powered directly from battery pack

• Microcontroller Peripheral Provides:

– Accurate Battery Fuel Gauging

– Internal Temperature Sensor for Battery

Temperature Reporting

– Configurable Level of State-of-Charge

(SOC) Interrupts

• I2C™ for Connection to System

Microcontroller Port

• Small 15-pin 2,69 × 1,75 mm, 0.5 mm pitch

CSP package

APPLICATIONS

• Feature Phones

• Smart Phones

• PDAs

• Digital Still and Video Cameras

• Handheld Terminals

• MP3 or Multimedia Players

DESCRIPTION

The Texas Instruments bq27425 system-side LiCoO2

battery fuel gauge is an easy to configure

microcontroller peripheral that provides fuel gauging

for single-cell LiCoO2 battery packs. The device

requires minimal user configurations and system

microcontroller firmware development for accurate

fuel gauging.

The bq27425 uses the patented Impedance Track™

algorithm for fuel gauging, and provides information

such as remaining battery capacity (mAh),

state-of-charge (%), and battery voltage (mV).

Battery fuel gauging with the bq27425 requires only

PACK+ (P+), PACK– (P–), for a removable battery

pack or embedded battery circuit. The 15-pin 2,69 ×

1,75 mm, 0.5 mm pitch CSP package is ideal for

space constrained applications.