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BQ27532-G1 ACTIVE Battery management unit Impedance Track™ fuel gauge for bq2425x charger

Improved safety and security, state-of-health (SOH) and multi-level based charge profiles

Product details

Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface I2C Battery capacity (Min) (mAh) 300 Battery capacity (Max) (mAh) 8000 Implementation System External capacity indication None Features Impedance Track™ algorithm Operating temperature range (C) -40 to 85
Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface I2C Battery capacity (Min) (mAh) 300 Battery capacity (Max) (mAh) 8000 Implementation System External capacity indication None Features Impedance Track™ algorithm Operating temperature range (C) -40 to 85
DSBGA (YZG) 12 0 mm² 2.47 x 1.996
  • Battery Fuel Gauge for 1-Series Li-Ion Applications
  • Resides on System Main Board
    • Works With Embedded or Removable Battery Packs
  • Uses PACK+, PACK–, and T Battery Terminals
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging
    • Internal Temperature Sensor for Battery Temperature Reporting
    • Battery Low Interrupt Warning
    • Battery Insertion Indicator
    • Configurable Level of State of Charge (SOC) Interrupts
    • State of Health Indicator
    • 96 Bytes of Non-Volatile Scratch-Pad FLASH
  • Battery Fuel Gauge Based on Patented Impedance Track™ Technology
    • Models the 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 (10 m or Less)
  • 400-kHz I2C™ Interface for Connection to System Microcontroller Port
  • In a 12-Pin NanoFree™ (CSP) Packaging
  • APPLICATIONS
    • Smartphones
    • PDAs
    • Digital Still and Video Cameras
    • Handheld Terminals
    • MP3 or Multimedia Players


Impedance Track, NanoFree are trademarks of Texas Instruments.
I2C is a trademark of Philips Electronics.

  • Battery Fuel Gauge for 1-Series Li-Ion Applications
  • Resides on System Main Board
    • Works With Embedded or Removable Battery Packs
  • Uses PACK+, PACK–, and T Battery Terminals
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging
    • Internal Temperature Sensor for Battery Temperature Reporting
    • Battery Low Interrupt Warning
    • Battery Insertion Indicator
    • Configurable Level of State of Charge (SOC) Interrupts
    • State of Health Indicator
    • 96 Bytes of Non-Volatile Scratch-Pad FLASH
  • Battery Fuel Gauge Based on Patented Impedance Track™ Technology
    • Models the 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 (10 m or Less)
  • 400-kHz I2C™ Interface for Connection to System Microcontroller Port
  • In a 12-Pin NanoFree™ (CSP) Packaging
  • APPLICATIONS
    • Smartphones
    • PDAs
    • Digital Still and Video Cameras
    • Handheld Terminals
    • MP3 or Multimedia Players


Impedance Track, NanoFree are trademarks of Texas Instruments.
I2C is a trademark of Philips Electronics.

The Texas Instruments bq27505 system-side 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 micro- controller firmware development. The bq27505 resides on the system’s main board and manages an embedded battery (non-removable) or a removable battery pack.

The bq27505 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), temperature (°C) and state of health (%).

Battery fuel gauging with the bq27505 requires only PACK+ (P+), PACK– (P–), and Thermistor (T) connections to a removable battery pack or embedded battery circuit. The CSP option is a 12-ball package in the dimensions of 2,43 mm × 1,96 mm with 0,5 mm lead pitch. It is ideal for space constrained applications.

The Texas Instruments bq27505 system-side 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 micro- controller firmware development. The bq27505 resides on the system’s main board and manages an embedded battery (non-removable) or a removable battery pack.

The bq27505 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), temperature (°C) and state of health (%).

Battery fuel gauging with the bq27505 requires only PACK+ (P+), PACK– (P–), and Thermistor (T) connections to a removable battery pack or embedded battery circuit. The CSP option is a 12-ball package in the dimensions of 2,43 mm × 1,96 mm with 0,5 mm lead pitch. It is ideal for space constrained applications.

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Technical documentation

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Type Title Date
* Data sheet System-Side Impedance Track™ Fuel Gauge* datasheet (Rev. A) 24 Feb 2010
Application note Going to Production With the bq275xx (Rev. F) 09 Oct 2014
Application note Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm (Rev. A) PDF | HTML 16 May 2014
Application note Using I2C Communication With the bq275xx Series of Fuel Gauges (Rev. B) 15 May 2014
User guide bq27505EVM System-Side, Single-Cell Impedance Track™ (Rev. A) 04 Oct 2013
Application note Going to Production With the bq275xx (Rev. E) 20 Jan 2012
Application note Thermistor Selection Guide for Texas Instruments Advanced Fuel Gauges 28 Sep 2011
Application note Updating bq275xx Firmware at Production (Rev. A) 21 Feb 2011
Application note bq27505-J2 to bq27505-J3 Change List 26 Jan 2010
Application note bq27505-J3 to bq27505-J4 Change List 22 Jan 2010
User guide bqEasy(TM) for bq27505 Impedance Track(TM) Devices 17 Aug 2009
Application note How to Use bq27505 in a Smart Phone System 08 Aug 2009
Application note Quick-Start Guide for bq27505 Family Gas Gauge 08 Aug 2009
Application note Updating Firmware with the bq2750x and EVM. (Rev. A) 22 Jul 2008

Design & development

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

Design tool

GASGAUGECHEM-SW Gas gauge chemistry updater

The chemistry updater installer contains data used by the bqEvaluation / bqEVSW / bqEASY tool for selecting the correct or closest chemical identification file for your battery pack.

The battery management studio (bqStudio) chemistry update zip file contains data used by bqStudio for selecting the (...)

Supported products & hardware

Supported products & hardware

Products
Battery fuel gauges
BQ20Z40-R1 SBS 1.1 compliant Gas Gauge with Impedance Track™ Technology BQ20Z45-R1 SBS 1.1 compliant Gas Gauge with Impedance Track™ Technology BQ20Z70-V160 SBS 1.1-compliant gas gauge enabled with Impedance Track™ technology for use with the bq29330 BQ20Z75-V160 SBS 1.1-compliant gas gauge and protection-enabled IC with Impedance Track™; BQ20Z80A-V110 SBS 1.1 compliant gas gauge enabled with Impedance Track™; technology for use with the bq29312A BQ20Z90-V150 SBS v1.1 compliant gas gauge for use with the bq29330 BQ20Z95 SBS 1.1-Compliant Gas Gauge Enabled w/Impedance Track BQ27500-V120 System-side Impedance Track™; fuel gauge with FW v1.20 BQ27500-V130 System-side Impedance Track™; fuel gauge with FW v1.30 BQ27501 Complete System side battery fuel gauge with Impedance Track™; technology BQ27505-J2 System-side Impedance Track™; fuel gauge with FW v2.15 BQ27505-J3 System-side Impedance Track™; fuel gauge with FW v2.20 BQ27505-J4 System-side Impedance Track™; fuel gauge with FW v2.24 BQ27510-G1 System-side Impedance-Track fuel gauge that provides 96 bytes of user-programmable data Flash memory BQ27541 Single cell Li-ion battery fuel gauge for battery pack Integration
Hardware development
BQEVSW

BQ evaluation software (BQEVSW) v0.0.92 for BQ30Z554-R1

Software
BQSTUDIO Battery Management Studio (bqStudio) Software
Download options
Support software

bq27505-J3 SENC file v2.20

SLUC168.ZIP (47 KB)
Support software

bq27505 Evaluation Software (Rev. B)

SLUC170B.ZIP (20748 KB)
Support software

bqEVSW installer for all bq275xx devices (Rev. C)

SLUC367C.ZIP (63861 KB)
CAD/CAE symbol

Mathcad Chemistry Selection Tool (Rev. DJ)

SLUC138DJ.ZIP (6840 KB)
Package Pins Download
DSBGA (YZG) 12 View options

Ordering & quality

Information included:
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  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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