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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.