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Product details

Parameters

Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface HDQ, I2C Implementation Pack Operating temperature range (C) -40 to 85 open-in-new Find other Battery fuel gauges

Package | Pins | Size

VSON (DRZ) 12 10 mm² 4 x 2.5 open-in-new Find other Battery fuel gauges

Features

  • Battery Fuel Gauge for 1-Series Li-Ion Applications
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging
    • Internal Temperature Sensor for System Temperature Reporting
    • SHA-1/HMAC Authentication
    • 96 Bytes of Non-Volatile Scratch Pad FLASH
  • Battery Fuel Gauging Based on Patented Impedance Track™ Technology
    • Models Battery Discharge Curve for Accurate Time-To-Empty Predictions
    • Automatically Adjusts for Battery Aging, Battery Self-Discharge, and
      Temperature/Rate Inefficiencies
    • Low-Value Sense Resistor (5 m to 20 m)
  • HDQ and I2C™ Interface Formats for Communication with Host System
  • Small 12-pin 2,5 mm × 4 mm SON Package
  • APPLICATIONS
    • Smartphones
    • PDAs
    • Digital Still and Video Cameras
    • Handheld Terminals
    • MP3 or Multimedia Players

Impedance Track is a trademark of Texas Instruments.
I2C is a trademark of Phillips Corporation.

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Description

The Texas Instruments bq27541 Li-Ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires little system microcontroller firmware development for accurate battery fuel gauging. The bq27541 resides within the battery pack or on the system’s main-board with an embedded battery (nonremovable).

The bq27541 uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), run-time to empty (min.), battery voltage (mV), and temperature (°C).

The bq27541 also features integrated support for secure battery pack authentication, using the SHA-1/HMAC authentication algorithm.

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Technical documentation

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Type Title Date
* Datasheet Single Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration datasheet Dec. 10, 2008
Application notes Gauge Communication Jan. 12, 2017
Technical articles Where's the Gauge? Part 1 Aug. 12, 2014
Application notes Using I2C Communication With the bq275xx Series of Fuel Gauges (Rev. B) May 15, 2014
Application notes Selecting an Impedance Track Gas Gauge for Li-Ion Single Cell Applications Apr. 10, 2012
Application notes Thermistor Selection Guide for Texas Instruments Advanced Fuel Gauges Sep. 28, 2011
Application notes WinCE/Linux Drivers for bq275xx Fuel Gauge Mar. 17, 2011
Application notes Going to Production With the bq2754x (Rev. A) Mar. 11, 2011
Application notes Updating bq275xx Firmware at Production (Rev. A) Feb. 21, 2011
More literature Battery Management for Handheld Applications [WMV] Apr. 23, 2010
Application notes How to Transfer bq27541 Into Hibernate Mode Apr. 13, 2010
Application notes bq27541 to bq27541-v200 Change List Feb. 17, 2010
Application notes How to Generate Golden Image for Single-Cell Impedance Track(TM) Devices Jan. 07, 2010
Application notes Configuring the bq2754x Data Flash May 27, 2009
Application notes Improving Battery Safety, Charging, and Fuel Gauging in Portable Media Apps Mar. 11, 2009
Application notes Single Cell Gas Gauge Application Book Jul. 28, 2008
Application notes Updating Firmware with the bq2750x and EVM. (Rev. A) Jul. 22, 2008
Application notes Impedance Track Fuel Gauge Accuracy Test for GSM Phone Applications Mar. 21, 2008
Application notes ESD and RF Mitigation in Handheld Battery Pack Electronics Mar. 06, 2008
Application notes Single Cell Gas Gauge Circuit Design Feb. 22, 2008
Application notes Single Cell Impedance Track Printed-Circuit Board Layout Feb. 22, 2008
Application notes Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm Jan. 31, 2008
Application notes Host-Side Gas-Gauge-System Design Considerations for Single-Cell Handheld Apps Oct. 12, 2007
White papers Impedance Track Based Fuel Gauging Sep. 27, 2007
User guides bq27541EVM Single Cell Impedance Track(TM) Technology Feb. 24, 2007

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$199.00
Description

This evaluation module (EVM) is a complete evaluation system for the bq27541. The EVM includes one bq27541 circuit module, a current sense resistor, one thermistor, an EV2300 personal computer (PC) interface board for gas gauge interface, a PC USB cable, and Windows™-based PC software. The (...)

Features
  • Complete evaluation system for the bq27541 gas gauge with Impedance Track™ Technology
  • Populated circuit module for quick setup
  • PC software and interface board for easy evaluation
  • Software that allows data logging for system analysis

Software development

DRIVERS & LIBRARIES Download
Linux Driver for BQ27XXX
BQ27XXXSW-LINUX The Linux driver supports the BQ27x series of Battery Fuel Gauges. The Linux driver supports communication through the I2C/HDQ bus and interfaces with the power supply sub-system to monitor battery properties.

 

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

(...)

DRIVERS & LIBRARIES Download
SLEC003A.ZIP (1456 KB)
SUPPORT SOFTWARE Download
SLUC152.ZIP (46 KB)
SUPPORT SOFTWARE Download
SLUC367C.ZIP (63861 KB)
SUPPORT SOFTWARE Download
SLUC368A.ZIP (47 KB)

Design tools & simulation

DESIGN TOOLS Download
Gas Gauge Chemistry Updater
GASGAUGECHEM-SW The Chemistry Updater installer contains data used by the bq Evaluation/ bqEVSW / bqEASY tool for selecting the correct or closest chemical identification file for your battery pack.

The Battery Management Studio (bqStudio) chemistry update zip file contains data used by bqStudio for selecting the (...)
document-generic User guide
CAD/CAE SYMBOLS Download
SLUC138DJ.ZIP (6840 KB)

CAD/CAE symbols

Package Pins Download
SON (DRZ) 12 View options

Ordering & quality

Support & training

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