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BQ27546-G1

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Single cell Impedance Track™ pack side fuel gauge with DSBGA package

Data sheet
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Single cell Impedance Track™ pack side fuel gauge with DSBGA package

BQ27546-G1

ACTIVE
Data sheet Order now

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

DSBGA (YZF) 15 5 mm² 2.65 x 1.996 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:
    • 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 15-Ball Nano-Free™ (DSBGA) Packaging

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Description

The bq27546-G1 Li-Ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires minimal system microcontroller firmware development for accurate battery fuel gauging. The bq27546-G1 resides within the battery pack or on the system’s main-board with an embedded battery (non-removable).

The bq27546-G1 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). It also provides detections for internal short or tab disconnection events.

The bq27546-G1 features integrated support for secure battery pack authentication, using the SHA-1/HMAC authentication algorithm.

The device comes in a 15-ball Nano-Free™ DSBGA package (2.61 mm × 1.96 mm) that is ideal for space-constrained applications.

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Similar but not functionally equivalent to the compared device:
NEW BQ27Z561-R2 ACTIVE Impedance track battery gas gauge solution for 1-series cell li-ion battery packs This product has improved hardware and the latest firmware with a smaller package.

Technical documentation

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Type Title Date
* Data sheet bq27546-G1 Single-Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration datasheet (Rev. B) May 04, 2018
* User guide bq27546-G1 Technical Reference Manual May 05, 2015
Application note Start Guide for the BQ27546-G1 Aug. 10, 2018
Application note Achieving The Successful Learning Cycle Jun. 19, 2018
Application note Enhanced Resolution Gauging for Low Current Applications Using Scaling Oct. 26, 2016
Application note Host System Calibration Method (Rev. B) May 19, 2016
Application note bq27545-G1 to bq27546-G1 Change List Aug. 10, 2015
User guide bq27546EVM Single-Cell Impedance Track Technology Evaluation Module May 07, 2015
Application note Using I2C Communication With the bq275xx Series of Fuel Gauges (Rev. B) May 15, 2014
Application note Thermistor Selection Guide for Texas Instruments Advanced Fuel Gauges Sep. 28, 2011
Application note How to Generate Golden Image for Single-Cell Impedance Track(TM) Devices Jan. 07, 2010
Application note ESD and RF Mitigation in Handheld Battery Pack Electronics Mar. 06, 2008
Application note Single Cell Gas Gauge Circuit Design Feb. 22, 2008
Application note Single Cell Impedance Track Printed-Circuit Board Layout Feb. 22, 2008
Application note Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm Jan. 31, 2008

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
99
Description

The BQ27546EVM 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 BQ27546EVM so that it can provide accurate battery fuel gauging information. BQ27546EVM gives the customer information such (...)

Features
  • Complete evaluation system for the bq27546 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
View details

Software development

APPLICATION SOFTWARE & FRAMEWORK 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 
View details
APPLICATION SOFTWARE & FRAMEWORK 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 & FRAMEWORK 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 & FRAMEWORK 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 (...)
DRIVER OR LIBRARY 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

(...)
FIRMWARE Download
SLUC606.ZIP (4083 KB)
SUPPORT SOFTWARE Download
SLUC564FW.ZIP (2777 KB)

Reference designs

REFERENCE DESIGNS Download
Single Cell Li-Ion Battery Pack-Side Fuel Gauge Reference Design
TIDA-00594 — The Texas Instruments bq27546-G1 Li-Ion battery fuel gauge reference design will help provide the most accurate state of charge tracking and turn any lithium ion battery pack into a smart battery. I2C and HDQ are both supported on this platform to provide versatile communications with a host (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
DSBGA (YZF) 15 View options

Ordering & quality

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  • Ongoing reliability monitoring

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