Product details

Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface HDQ, I2C Battery capacity (Min) (mAh) 100 Battery capacity (Max) (mAh) 32000 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) 100 Battery capacity (Max) (mAh) 32000 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 (1sXp) Li-Ion
    Applications up to 14,500-mAh Capacity
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging Supports up to
      14,500 mAh
    • Internal or External Temperature Sensor for
      Battery Temperature Reporting
    • SHA-1/HMAC Authentication
    • Lifetime Data Logging
    • 64 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 mΩ to 20 mΩ)
  • Advanced Fuel Gauging Features
    • Internal Short Detection
    • Tab Disconnection Detection
  • HDQ and I2C Interface Formats for
    Communication with Host System
  • Small 12-pin 2.50 mm × 4.00 mm SON Package
  • Complies with Battery Trip Point (BTP)
    Requirements
  • Battery Fuel Gauge for 1-Series (1sXp) Li-Ion
    Applications up to 14,500-mAh Capacity
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging Supports up to
      14,500 mAh
    • Internal or External Temperature Sensor for
      Battery Temperature Reporting
    • SHA-1/HMAC Authentication
    • Lifetime Data Logging
    • 64 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 mΩ to 20 mΩ)
  • Advanced Fuel Gauging Features
    • Internal Short Detection
    • Tab Disconnection Detection
  • HDQ and I2C Interface Formats for
    Communication with Host System
  • Small 12-pin 2.50 mm × 4.00 mm SON Package
  • Complies with Battery Trip Point (BTP)
    Requirements

The Texas Instruments bq27542-G1 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 fuel gauge resides within the battery pack or on the main board of thesystem with an embedded battery (non-removable).

The fuel gauge uses the patented Impedance Trackalgorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), run-time to empty (minimum), battery voltage (mV), and temperature (°C). It also provides detections for internal short or tab disconnection events.

The fuel gauge also features integrated support for secure battery pack authentication, using theSHA-1/HMAC authentication algorithm.

The Texas Instruments bq27542-G1 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 fuel gauge resides within the battery pack or on the main board of thesystem with an embedded battery (non-removable).

The fuel gauge uses the patented Impedance Trackalgorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), run-time to empty (minimum), battery voltage (mV), and temperature (°C). It also provides detections for internal short or tab disconnection events.

The fuel gauge also features integrated support for secure battery pack authentication, using theSHA-1/HMAC authentication algorithm.

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Technical documentation

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Type Title Date
* Data sheet bq27542-G1 Single Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration datasheet 08 May 2015
* User guide bq27542-G1 Technical Reference Manual (Rev. A) 25 May 2016
Application note Simple Guide to Chemical ID Selection Tool (GPC) (Rev. A) 05 Jun 2018
Application note Gauge Communication 12 Jan 2017
Application note Enhanced Resolution Gauging for Low Current Applications Using Scaling 26 Oct 2016
Technical article How to run an Impedance Track gas gauge learning cycle 02 Mar 2016
Technical article Maintain battery gauging accuracy even in cold weather 02 Dec 2015
Application note bq27542-G1 Change List 04 Aug 2015
User guide bq27542EVM Single-Cell Impedance Track™ Technology 05 May 2015
Application note Using I2C Communication With the bq275xx Series of Fuel Gauges (Rev. B) 15 May 2014
Application note Thermistor Selection Guide for Texas Instruments Advanced Fuel Gauges 28 Sep 2011
Analog design journal Fine tuning TI's Impedance Track™ battery fuel gauge with LiFePO4 cells 14 Mar 2011
Application note How to Generate Golden Image for Single-Cell Impedance Track(TM) Devices 07 Jan 2010
Analog design journal Improving Battery Safety, Charging, and Fuel Gauging in Portable Media Apps 11 Mar 2009
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
Analog design journal 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

BQ27542EVM — Li-ion Battery Fuel Gauge Evaluation Module

The BQ27542EVM along with bqStudio provides the customer tools for developing battery fuel gauging modules for a pack-side fuel gauge solution. Customers are able to configure BQ27542EVM so that it can provide accurate battery fuel gauging information. BQ27542EVM gives the customer information such (...)

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Application software & framework

BQSTUDIO — Battery Management Studio (bqStudio) Software

Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including (...)
Application software & framework

GPCCHEM — Gauging Parameter Calculator: Match chemistry for Impedance Track gauges

GPC Chemistry ID matching for Impedance Track (IT) algorithm gas gauges (Find closest chemistry match) must be done before Optimizing room temperature or low temperature performance.

Gauging Parameter Calculator Chemistry ID matching for Impedance track gas gauges (GPCCHEM) is a math calculation and (...)

Application software & framework

GPCRA0 — Gauging Parameter Calculator: Optimize room temperature performance for Impedance Track gauges

Gauging Parameter Calculator – Optimize room temperature performance for Impedance track gas gauges (GPCRA0) / Golden GG Maker is a math calculation tool that helps the battery designer to refine the Impedance Track battery gauge parameters for a given battery profile. It provides optimized (...)
Application software & framework

GPCRB — Gauging Parameter Calculator: Optimize room and low temp performance Impedance Track gauges

Gauging Parameter Calculator – Optimize room and low temperature performance for Impedance track gas gauges (GPCRB) is a math calculation tool that helps the battery designer to refine the Impedance Track battery gauge parameters for a given battery profile. Depending on the input log file, (...)
Driver or library

BQ27XXXSW-LINUX — Linux Driver for BQ27XXX

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

(...)

Support software

bqStudio Chemistry Updater (Rev. FW)

SLUC564FW.ZIP (2777 KB)
Reference designs

TIDA-00593 — Single Cell Li-Ion Battery Pack-side Fuel Gauge Reference Design

The Texas Instruments bq27542-G1 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 fuel gauge resides within the (...)
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SON (DRZ) 12 View options

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