Product details


Cell chemistry Li-Ion/Li-Polymer Number of series cells 2-4 Cells Communication interface SMBus Battery capacity (Min) (mAh) 800 Battery capacity (Max) (mAh) 32000 Implementation Pack External capacity indication LED Features SHA-1 Authentication Operating temperature range (C) -40 to 85 Cell balancing Internal open-in-new Find other Battery fuel gauges

Package | Pins | Size

TSSOP (DBT) 30 34 mm² 7.8 x 4.4 open-in-new Find other Battery fuel gauges


  • Next Generation Patented Impedance Track™ Technology Accurately
    Measures Available Charge in Li-Ion and Li-Polymer Batteries
  • Better Than 1% Error Over the Lifetime of the Battery
  • Supports the Smart Battery Specification SBS V1.1
  • Flexible Configuration for 2-, 3-, and 4-Series Li-Ion and Li-Polymer Cells
  • Powerful 8-Bit RISC CPU With Ultralow Power Modes
  • Full Array of Programmable Protection Features
    • Voltage, Current, and Temperature
  • Satisfies JEITA Guidelines
  • Added Flexibility to Handle More Complex Charging Profiles
  • Lifetime Data Logging
  • Drives 3-, 4-, or 5-Segment LED Display for Battery-Pack Conditions
  • Supports SHA-1 Authentication
  • Available in 30-Pin TSSOP (DBT) and 32-Pin QFN (RSM) Packages
    • Notebook PCs
    • Medical and Test Equipment
    • Portable Instrumentation

Impedance Track is a trademark of Texas Instruments.

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The bq20z60-R1 SBS-compliant gas gauge and protection IC, incorporating patented Impedance Track™ technology, is designed for battery-pack or in-system installation. The bq20z60-R1 measures and maintains an accurate record of available charge in Li-Ion or Li-Polymer batteries, using its integrated high-performance analog peripherals. The bq20z60-R1 monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack, which reports the information to the system host controller over a serial-communication bus. It is designed to work with the bq29330 analog front-end (AFE) protection IC to maximize functionality and safety, while minimizing external component count and cost in smart battery circuits.

The Impedance Track™ technology continuously analyzes the battery impedance, resulting in superior gas-gauging accuracy. This enables the remaining capacity to be calculated with discharge rate, temperature, and cell aging, which are all accounted for during each stage of every cycle with high accuracy.

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Technical documentation

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Type Title Date
* Data sheet SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™* datasheet (Rev. A) Mar. 24, 2011
Application note Wide-Vin Battery-Charger Using SMBus MSP430 MCUs and bq Fuel Gauges (Rev. B) Jul. 12, 2019
Application note bq20z90/bq20z95 to bq20z60/bq20z65 Change List. (Rev. A) Apr. 19, 2011
User guide bq20z60-R1/bq20z65-R1 Technical Reference Manual Dec. 22, 2009
Application note bq20z40/45/60/65 Printed-Circuit Board Layout Guide Dec. 03, 2009
Application note bq20z40/45 and bq20z60/65 Gas Gauge Circuit Design Aug. 10, 2009
Application note bq20z40/45 and bq20z60/65 EVM Data Flash Settings for Number of Serial Cells Aug. 07, 2009
Application note bq20z40/bq20z45 and bq20z60/bq20z65 Data Flash Comparison Jul. 09, 2009

Design & development

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

Hardware development

document-generic User guide

The Texas Instruments Advanced bqMTester Multi-Station Test and Program Board is designed to calibrate and program electronic smart battery modules based on the latest Texas Instruments advanced battery gas gauges (BQ20z40 (...)

  • Programs and Calibrates Smart Battery Modules Based on the Following Devices: BQ20z40 (...)

Software development

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 (...)

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 (...)
BQ20Z60-R1 bqEASY Software
BQ20Z60-R1_BQEVSW-SW bqEVSW is a tool that simplifies the bq gas gauge configuration and parameter optimize process.
  • Ensure to start with a known good data flash
  • Simplify DF configuration
  • Guide through device calibration
  • Help to select the right chemistry
  • Learn correct battery Qmax and Resistance
SLUC261HY.ZIP (496964 KB)

Design tools & simulation

SLUC138DJ.ZIP (6840 KB)

CAD/CAE symbols

Package Pins Download
TSSOP (DBT) 30 View options

Ordering & quality

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

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