1 Features

1• Single-Series Cell Li-Ion Battery Fuel Gauge

– Resides on System Board

– Supports Embedded or Removable Batteries

– Powered Directly From Battery With Integrated

LDO

– Low-Value Integrated Sense Resistor

(10 mΩ, Typical)

• Easy-to-Configure Fuel Gauging Based on

Patented Impedance Track™ Technology

– Reports Remaining Capacity and State of

Charge (SOC) With Smoothing Filter

– Automatically Adjusts for Battery Aging, Self-

Discharge, Temperature, and Rate Changes

– Battery State-of-Health (Aging) Estimation

• Microcontroller Peripheral Supports:

– 400-kHz I2C Serial Interface

– Configurable SOC Interrupt or

Battery Low Digital Output Warning

– Internal Temperature Sensor or

Host-Reported Temperature

2 Applications

• Smart Phones, Feature Phones, and Tablets

• Digital Still and Video Cameras

• Handheld Terminals

• MP3 or Multimedia Players

3 Description

The Texas Instruments bq27425-G2 fuel gauge is an

easy-to-configure microcontroller peripheral that

provides system-side fuel gauging for single-cell Li-

Ion batteries. The device requires minimal user

configuration and system microcontroller firmware

development.

The fuel gauge 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-G2 fuel gauge

requires connections only to PACK+ (P+) and PACK–

(P–) for a removable battery pack or embedded

battery circuit. The 15-pin, 2.69 mm × 1.75 mm, 0.5-

mm pitch chip scale package (DSBGA) is ideal for

space-constrained applications.