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Battery fuel gauges

BQ27500-V120

ACTIVE

System-side Impedance Track™; fuel gauge with FW v1.20

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Data sheet

A newer version of this product is available

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Same functionality with different pin-out to the compared device.
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

BQ27500-V120

ACTIVE
Data sheet Order now

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
VSON (DRZ) 12 10 mm² 4.0 x 2.5
  • Battery Fuel Gauge for 1-Series Li-Ion Applications
  • Resides on System Main Board
    • WBaotrtkesrywPitahckEsmbedded or Removable
  • Uses PACK+, PACK-, and T Battery Terminals
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging
    • Internal Temperature Sensor for System Temperature Reporting
    • Battery Low Interrupt Warning
    • Battery Insertion 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 mΩ or Less)
  • I2C™ Interface for Connection to System Microcontroller Port
  • 12-Pin 2,5-mm ' 4-mm SON Package
  • applications
    • Smartphones
    • PDAs
    • Digital Still and Video Cameras
    • Handheld Terminals
    • MP3 or Multimedia Players

Impedance Track is a trademark of Texas Instruments.
I2C is a trademark of Philips Electronics.

  • Battery Fuel Gauge for 1-Series Li-Ion Applications
  • Resides on System Main Board
    • WBaotrtkesrywPitahckEsmbedded or Removable
  • Uses PACK+, PACK-, and T Battery Terminals
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging
    • Internal Temperature Sensor for System Temperature Reporting
    • Battery Low Interrupt Warning
    • Battery Insertion 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 mΩ or Less)
  • I2C™ Interface for Connection to System Microcontroller Port
  • 12-Pin 2,5-mm ' 4-mm SON Package
  • applications
    • Smartphones
    • PDAs
    • Digital Still and Video Cameras
    • Handheld Terminals
    • MP3 or Multimedia Players

Impedance Track is a trademark of Texas Instruments.
I2C is a trademark of Philips Electronics.

The Texas Instruments bq27500 system-side Li-Ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery pmaiccrkosc.ontrTohlleer firdmewviacree derveeqluoipremsent.liTttlhee bqs2y7s5te0m0 resides on the system main board, and manages an embedded battery (non-removable) or a removable battery pack.

The bq27500 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).

Battery fuel gauging with the bq27500 requires only PACK+ (P+), PACK- (P-), and Thermistor (T) connections to a removable battery pack or embedded battery.

The Texas Instruments bq27500 system-side Li-Ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery pmaiccrkosc.ontrTohlleer firdmewviacree derveeqluoipremsent.liTttlhee bqs2y7s5te0m0 resides on the system main board, and manages an embedded battery (non-removable) or a removable battery pack.

The bq27500 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).

Battery fuel gauging with the bq27500 requires only PACK+ (P+), PACK- (P-), and Thermistor (T) connections to a removable battery pack or embedded battery.
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Technical documentation

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Type Title Date
* Data sheet System-Side Impedance-Track Fuel Gauge datasheet 20 Oct 2008
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
EVM User's guide bq2750xEVM 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 Updating bq275xx Firmware at Production (Rev. A) 21 Feb 2011
Application note How to Generate Golden Image for Single-Cell Impedance Track(TM) Devices 07 Jan 2010
Application note bq27500-V120 to bq27500-V130 Change List 03 Dec 2009
Application note Feature Set Comparison of bq27x00, bq27x10, bq27500, and bq27510 (Rev. A) 02 Dec 2008
Application note bq27500-V100 to bq27500-V120 Change List 02 Dec 2008
Application note Updating Firmware with the bq2750x and EVM. (Rev. A) 22 Jul 2008
User guide bqEASY for Single Cell Impedance Track TM Devices (Rev. A) 04 Apr 2008
Application note Configuring the bq27500 Data Flash (Rev. A) 01 Feb 2008
Application note Quick Start Guide for bq2750x Family Gas Gauge 23 Jan 2008
EVM User's guide bq27500 EVM (HPA219 Rev. A) Errata 08 Nov 2007
Application note Key Design Considerations for the bq27500 and bq27501 30 Oct 2007
More literature Quick Start Guide for bq27500/1EVM Kit 24 Oct 2007

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

bq27500-V120 Senc File

SLUC148.ZIP (48 KB)
Download
Support software

bqEVSW installer for all bq275xx devices (Rev. C)

SLUC367C.ZIP (63861 KB)
Download
Simulation model

BQ275xx IBIS Model

SLUC119.ZIP (14 KB) - IBIS Model
Download
CAD/CAE symbol

Mathcad Chemistry Selection Tool (Rev. DJ)

SLUC138DJ.ZIP (6840 KB)
Download
Package Pins Download
SON (DRZ) 12 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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