BQ27425-G2_15 Datasheet, PDF (1/39 Pages) Texas Instruments – Fuel Gauge With Integrated Sense Resistor

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bq27425-G2
SLUSB23B – OCTOBER 2012 – REVISED JUNE 2015
bq27425-G2 System-Side Impedance Track™ Fuel Gauge With Integrated Sense Resistor
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.
Device Information⁽¹⁾
DEVICE NAME
PACKAGE
BODY SIZE (NOM)
bq27425-G2
DSBGA (15)
2.69 mm × 1.75 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
System
Interface
I2C
VCC
VBAT
REGIN
LDO
bq27425
DATA
Voltage
Sense
PACK +
To Charger
T
Single Cell Li- Ion
Battery Pack
PROTECTION
IC
GPOUT
BIN
SRX
Integrated
Current
Sense
VSS
PACK -
FETs
CHG
DSG
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.