BQ27441-G1 Datasheet, PDF (1/22 Pages) Texas Instruments – System-Side Impedance Track Fuel Gauge

bq27441-G1
www.ti.com
SLUSBH1A – NOVEMBER 2013 – REVISED JANUARY 2014
System-Side Impedance Track™ Fuel Gauge
Check for Samples: bq27441-G1
FEATURES
1
•23 Single Series Cell Li-Ion Battery Fuel Gauge
– Resides on System Board
– Supports Embedded or Removable
Batteries
– Powered Directly from Battery with
Integrated LDO
– Supports a Low-Value External Sense
Resistor (10mΩ)
• 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
• Small 12-pin 2.5 mm × 4 mm SON Package
APPLICATIONS
• Smartphones, Feature Phones and Tablets
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players
DESCRIPTION
The Texas Instruments bq27441-G1 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 bq27441-G1 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 bq27441-G1 requires
connections only to PACK+ (P+) and PACK– (P–) for
a removable battery pack or embedded battery
circuit. The tiny 12-pin 2.5 mm × 4 mm SON package
is ideal for space constrained applications.
TYPICAL APPLICATION
SCL
I²C
Bus
SDA
GPOUT
BIN
Coulomb
Counter
CPU
ADC
bq27441
1.8V
LDO
SRN
VSYS
SRP
BAT
PACKP
VDD
0.47uF
VSS
T
PACKN
Battery Pack
Li-Ion
Cell
Protection
IC
NFET NFET
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.
Impedance Track is a trademark of Texas Instruments.
2
I²C is a trademark of NXP B.V. Corp Netherlands.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013–2014, Texas Instruments Incorporated