Single cell Li-ion battery fuel gauge for battery pack Integration; FW upgrade to BQ27541

BQ27541-V200

ACTIVE

Product details

Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface HDQ, I2C Battery capacity (Min) (mAh) 300 Battery capacity (Max) (mAh) 8000 Implementation Pack External capacity indication None Features Impedance Track™ algorithm, SHA-1 Authentication Operating temperature range (C) -40 to 85 Cell balancing
Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface HDQ, I2C Battery capacity (Min) (mAh) 300 Battery capacity (Max) (mAh) 8000 Implementation Pack External capacity indication None Features Impedance Track™ algorithm, SHA-1 Authentication Operating temperature range (C) -40 to 85 Cell balancing
VSON (DRZ) 12 10 mm² 4 x 2.5
  • 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
    • Lifetime Data Logging
    • 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 (5mΩ to 20mΩ)
  • 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

  • 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
    • Lifetime Data Logging
    • 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 (5mΩ to 20mΩ)
  • 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

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.

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
* Data sheet Single Cell Li-Ion Battery Fuel Gauge for Battery-Pack Integration datasheet (Rev. B) 19 Sep 2013
Application note Using I2C Communication With the bq275xx Series of Fuel Gauges (Rev. B) 15 May 2014
Application note bq27541-v200 to bq27541-G1 Change List (Rev. A) 21 Oct 2012
Application note Thermistor Selection Guide for Texas Instruments Advanced Fuel Gauges 28 Sep 2011
Application note WinCE/Linux Drivers for bq275xx Fuel Gauge 17 Mar 2011
Application note Fine tuning TI's Impedance Track™ battery fuel gauge with LiFePO4 cells 14 Mar 2011
Application note Going to Production With the bq2754x (Rev. A) 11 Mar 2011
Application note Configuring the bq27541-V200 Data Flash (Rev. B) 09 Mar 2011
Application note Updating bq275xx Firmware at Production (Rev. A) 21 Feb 2011
Application note bq27541 to bq27541-v200 Change List 17 Feb 2010
Application note How to Generate Golden Image for Single-Cell Impedance Track(TM) Devices 07 Jan 2010
Application note Configuring the bq2754x Data Flash 27 May 2009
Application note Improving Battery Safety, Charging, and Fuel Gauging in Portable Media Apps 11 Mar 2009
Application note Single Cell Gas Gauge Application Book 28 Jul 2008
Application note Updating Firmware with the bq2750x and EVM. (Rev. A) 22 Jul 2008
Application note Impedance Track Fuel Gauge Accuracy Test for GSM Phone Applications 21 Mar 2008
Application note ESD and RF Mitigation in Handheld Battery Pack Electronics 06 Mar 2008
Application note Single Cell Gas Gauge Circuit Design 22 Feb 2008
Application note Single Cell Impedance Track Printed-Circuit Board Layout 22 Feb 2008
Application note Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm 31 Jan 2008
Application note Host-Side Gas-Gauge-System Design Considerations for Single-Cell Handheld Apps 12 Oct 2007
White paper Impedance Track Based Fuel Gauging 27 Sep 2007

Design & development

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

Evaluation board

BQ27541EVM — Single Cell Impedance Track™ Battery Fuel Gauge With LDO Evaluation Module | Gas Gauge

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 (...)

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Support software

bq27541 v2.00 SENC File

SLUC174.ZIP (46 KB)
Support software

Gas Gauge Chemistry Updater Setup v7.82 (Rev. HY)

SLUC261HY.ZIP (496964 KB)
Support software

bqEVSW installer for all bq275xx devices (Rev. C)

SLUC367C.ZIP (63861 KB)
Support software

bq27541-G1 (v2.24) Firmware (.senc file) (Rev. A)

SLUC368A.ZIP (47 KB)
CAD/CAE symbol

Mathcad Chemistry Selection Tool (Rev. DJ)

SLUC138DJ.ZIP (6840 KB)
Reference designs

TIDA-00041 — Energy Harvesting Reference Design Solution for Ultra Low Power Boost Converter IC

This reference design is an ultra low power boost converter for energy harvesting Applications. This solution is programmed from the factory for settings compatible with most MCU’s and 3V coin cell batteries. The design is programmed to deliver a 3.1VDC maximum voltage (OV) for charging the (...)
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SON (DRZ) 12 View options

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