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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) 300 Battery capacity (Max) (mAh) 16000 Implementation Pack External capacity indication None Features SHA-1 Authentication Operating temperature range (C) -40 to 85 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 14500-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 and 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

All trademarks are the property of their respective owners.

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Description

The bq27545-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 bq27545-G1 resides within the battery pack or on the system’s main-board with an embedded battery (non removable).

The bq27545-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 (minimum), battery voltage (mV), and temperature (°C). It also provides detections for internal short or tab disconnection events.

The bq27545-G1 also 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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Technical documentation

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Type Title Date
* Data sheet bq27545-G1 Single-Cell Li-Ion Battery Fuel Gauge For Battery Pack Integration datasheet (Rev. E) May 11, 2018
Application note Achieving The Successful Learning Cycle Jun. 19, 2018
Application note Host System Calibration Method (Rev. B) May 19, 2016
Application note bq27545-G1 to bq27546-G1 Change List Aug. 10, 2015
Application note Using I2C Communication With the bq275xx Series of Fuel Gauges (Rev. B) May 15, 2014
Application note bq27541-v200 to bq27541-G1 Change List (Rev. A) Oct. 21, 2012
Application note Configuring the bq2754x-G1 Data Flash Oct. 16, 2012
User guide bq27545EVM Single-Cell Impedance Track™ Technology Jun. 12, 2012
Application note Thermistor Selection Guide for Texas Instruments Advanced Fuel Gauges Sep. 28, 2011
Application note WinCE/Linux Drivers for bq275xx Fuel Gauge Mar. 17, 2011
Application note Going to Production With the bq2754x (Rev. A) Mar. 11, 2011
Application note How to Generate Golden Image for Single-Cell Impedance Track(TM) Devices Jan. 07, 2010
Application note Updating Firmware with the bq2750x and EVM. (Rev. A) Jul. 22, 2008
Application note Impedance Track Fuel Gauge Accuracy Test for GSM Phone Applications Mar. 21, 2008
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.

Software development

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 (...)
FIRMWARE Download
SLUC606.ZIP (4083 KB)
SUPPORT SOFTWARE Download
SLUC367C.ZIP (63861 KB)
SUPPORT SOFTWARE Download
SLUC389.ZIP (47 KB)
SUPPORT SOFTWARE Download
SLUC564FW.ZIP (2777 KB)

CAD/CAE symbols

Package Pins Download
DSBGA (YZF) 15 View options

Ordering & quality

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