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Product details

Parameters

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 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 (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
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Description

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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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
BQ27Z561-R1 ACTIVE Impedance Track™ battery gas gauge solution for 1-series cell Li-ion battery packs This product has improved hardware and firmware with a smaller package.

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 19
Type Title Date
* Datasheet bq27542-G1 Single Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration datasheet May 08, 2015
* User guides bq27542-G1 Technical Reference Manual (Rev. A) May 25, 2016
Application notes Achieving The Successful Learning Cycle Jun. 19, 2018
Application notes Enhanced Resolution Gauging for Low Current Applications Using Scaling Oct. 26, 2016
Technical articles How to run an Impedance Track gas gauge learning cycle Mar. 02, 2016
Technical articles Maintain battery gauging accuracy even in cold weather Dec. 02, 2015
Application notes bq27542-G1 Change List Aug. 04, 2015
User guides bq27542EVM Single-Cell Impedance Track™ Technology May 05, 2015
Application notes Using I2C Communication With the bq275xx Series of Fuel Gauges (Rev. B) May 15, 2014
Application notes Thermistor Selection Guide for Texas Instruments Advanced Fuel Gauges Sep. 28, 2011
Application notes Fine tuning TI's Impedance Track™ battery fuel gauge with LiFePO4 cells Mar. 14, 2011
Application notes How to Generate Golden Image for Single-Cell Impedance Track(TM) Devices Jan. 07, 2010
Application notes Improving Battery Safety, Charging, and Fuel Gauging in Portable Media Apps Mar. 11, 2009
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

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
149
Description

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 (...)

Features
  • Complete evaluation system for the bq27542 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

APPLICATION SOFTWARE & FRAMEWORKS Download
Battery Management Studio (bqStudio) Software
BQSTUDIO 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 (...)
Features
  • Real-time Gauge Dashboard for monitoring basic registers
  • Full register access and logging
  • Full data memory access and logging
  • Product configuration and monitoring tools
  • Import and export of product configurations
  • Calibration and test automation
  • Export of FS files for the target production environment 
APPLICATION SOFTWARE & FRAMEWORKS Download
Gauging Parameter Calculator: Match chemistry for Impedance Track gauges
GPCCHEM 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 & FRAMEWORKS Download
Gauging Parameter Calculator: Optimize room temperature performance for Impedance Track gauges
GPCRA0 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 & FRAMEWORKS Download
Gauging Parameter Calculator: Optimize room and low temp performance Impedance Track gauges
GPCRB 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, it (...)
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

(...)

SUPPORT SOFTWARE Download
SLUC564FW.ZIP (2777 KB)

Reference designs

REFERENCE DESIGNS Download
Single Cell Li-Ion Battery Pack-side Fuel Gauge Reference Design
TIDA-00593 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SON (DRZ) 12 View options

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