A newer version of this product is available

Same functionality with different pin-out to the compared device.
BQ40Z50-R2 ACTIVE 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0

SHA-1 authentication, TURBO mode 2.0, black box recorder, adaptive charging

Product details

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TSSOP (DBT) 44 71 mm² 11.15 x 6.4
  • 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 to 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, and 5 Segment LED Display for Battery-Pack Conditions
  • Supports SHA-1 Authentication
  • Complete Battery Protection and Gas Gauge Solution in One Package
  • Available in a 44-Pin TSSOP (DBT) package
  • APPLICATIONS
    • Notebook PCs
    • Medical and Test Equipment
    • Portable Instrumentation
  • 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 to 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, and 5 Segment LED Display for Battery-Pack Conditions
  • Supports SHA-1 Authentication
  • Complete Battery Protection and Gas Gauge Solution in One Package
  • Available in a 44-Pin TSSOP (DBT) package
  • APPLICATIONS
    • Notebook PCs
    • Medical and Test Equipment
    • Portable Instrumentation

The bq20z65-R1 SBS-compliant gas gauge and protection IC, incorporating patented Impedance Track™ technology, is a single IC solution designed for battery-pack or in-system installation. The bq20z65-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 bq20z65-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. Together with the integrated analog front-end (AFE) short-circuit and overload protection, the bq20z65-R1 maximizes functionality and safety while minimizing external component count, cost, and size in smart battery circuits.

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

The bq20z65-R1 SBS-compliant gas gauge and protection IC, incorporating patented Impedance Track™ technology, is a single IC solution designed for battery-pack or in-system installation. The bq20z65-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 bq20z65-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. Together with the integrated analog front-end (AFE) short-circuit and overload protection, the bq20z65-R1 maximizes functionality and safety while minimizing external component count, cost, and size in smart battery circuits.

The implemented Impedance Track™ gas gauging technology continuously analyzes the battery impedance, resulting in superior gas-gauging accuracy. This enables remaining capacity to be calculated with discharge rate, temperature, and cell aging 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 and Protection Enabled With Impedance Track™ datasheet 21 Dec 2009
Application note Wide-Vin Battery-Charger Using SMBus MSP430 MCUs and bq Fuel Gauges (Rev. B) PDF | HTML 12 Jul 2019
Application note Thermistor Selection Guide for Texas Instruments Advanced Fuel Gauges 28 Sep 2011
Application note bq20z90/bq20z95 to bq20z60/bq20z65 Change List. (Rev. A) 19 Apr 2011
User guide bq20z60-R1/bq20z65-R1 Technical Reference Manual 22 Dec 2009
Application note bq20z40/45/60/65 Printed-Circuit Board Layout Guide 03 Dec 2009
Application note bq20z40/45 and bq20z60/65 Gas Gauge Circuit Design 10 Aug 2009
Application note bq20z40/45 and bq20z60/65 EVM Data Flash Settings for Number of Serial Cells 07 Aug 2009
Application note bq20z40/bq20z45 and bq20z60/bq20z65 Data Flash Comparison 09 Jul 2009
EVM User's guide bq20z65EVM-001 Impedance Track Technology Enabled Batt Mgt Solution 22 Jun 2009

Design & development

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

Evaluation board

ADVANCED-BQMTESTER — Texas Instruments Advanced bqMTester Multi-Station Test and Program Board

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, (...)

User guide: PDF
Not available on TI.com
Evaluation board

MKST-3P-ALT-EV2300 — MKS Technology alternative for EV2300 communications transceiver

This solution, available from MKS Technology, is an alternative for the EV2300 communications transceiver. The solution from MKS Technology has been validated and works with both the BQMTESTER and ADVANCED-BQMTESTER. It has been validated and works with bq Evaluation software (bqEVSW). Using the (...)

User guide: PDF
Support software

BQ20Z65-R1_BQEVSW-SW — BQ20Z65-R1 bqEASY Software

bqEVSW is a tool that simplifies the bq gas gauge configuration and parameter optimize process.
Support software

Gas Gauge Chemistry Updater Setup v7.82 (Rev. HY)

SLUC261HY.ZIP (496964 KB)
lock = Requires export approval (1 minute)
CAD/CAE symbol

Mathcad Chemistry Selection Tool (Rev. DJ)

SLUC138DJ.ZIP (6840 KB)
Reference designs

TIDA-00050 — Impedance Track™ Technology Enabled Battery Management Solution Reference Design

This reference design is designed for the bq20z65/bq29412 battery management system. It includes one bq20z65/bq29412 circuit module and a link to Windows™-based PC software. The circuit module design includes one bq20z65 integrated circuit (IC), one bq29412 IC and all other onboard (...)
Test report: PDF
Schematic: PDF
Package Pins Download
TSSOP (DBT) 44 View options

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