A newer version of this product is available

open-in-new Compare products
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

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) 15000 Implementation Pack External capacity indication LED Features Impedance Track™ algorithm, SHA-1 Authentication Operating temperature range (C) -40 to 85 Cell balancing Internal
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) 15000 Implementation Pack External capacity indication LED Features Impedance Track™ algorithm, SHA-1 Authentication Operating temperature range (C) -40 to 85 Cell balancing Internal
TSSOP (DBT) 30 34 mm² 4.4 x 7.8
  • Patented Impedance Track™ Technology Accurately Measures Available Charge in Li-Ion and Li-Polymer Batteries
  • Better than 1% Error Over Lifetime of the Battery
  • Instant Accuracy — No Learning Cycle Required
  • Automatically adjusts for battery aging, battery self discharge and temperature inefficiencies
  • Supports the Smart Battery Specification SBS V1.1
  • Works With the TI bq29330 Analog Front-End (AFE) Protection IC to Provide Complete Pack Electronics Solution
  • Full Array of Programmable Voltage, Current, and Temperature Protection Features
  • Integrated Time Base Removes Need for External Crystal with Optional Crystal Input
  • Electronics for 7.2-V, 10.8-V or 14.4-V Battery Packs With 50% Fewer External Components
  • Based on a Powerful Low-Power RISC CPU Core With High-Performance Peripherals
  • Integrated Field Programmable FLASH Memory Eliminates the Need for External Configuration Memory
  • Measures Charge Flow Using a High-Resolution, 16-Bit Integrating Delta-Sigma Converter
    • Better Than 0.65 nVh of Resolution
    • Self-Calibrating
  • Uses 16-Bit Delta-Sigma Converter for Accurate Voltage and Temperature Measurements
  • Extensive Data Reporting Options For Improved System Interaction
  • Optional Pulse Charging Feature for Improved Charge Times
  • Drives 3-, 4- or 5-Segment LED Display for Remaining Capacity Indication
  • Supports SHA-1 Authentication
  • Lifetime Data Logging
  • 30-Pin TSSOP (DBT)
  • APPLICATIONS
    • Notebook PCs
    • Medical and Test Equipment
    • Portable Instrumentation

IMPEDANCE TRACK is a trademark of Texas Instruments.

  • Patented Impedance Track™ Technology Accurately Measures Available Charge in Li-Ion and Li-Polymer Batteries
  • Better than 1% Error Over Lifetime of the Battery
  • Instant Accuracy — No Learning Cycle Required
  • Automatically adjusts for battery aging, battery self discharge and temperature inefficiencies
  • Supports the Smart Battery Specification SBS V1.1
  • Works With the TI bq29330 Analog Front-End (AFE) Protection IC to Provide Complete Pack Electronics Solution
  • Full Array of Programmable Voltage, Current, and Temperature Protection Features
  • Integrated Time Base Removes Need for External Crystal with Optional Crystal Input
  • Electronics for 7.2-V, 10.8-V or 14.4-V Battery Packs With 50% Fewer External Components
  • Based on a Powerful Low-Power RISC CPU Core With High-Performance Peripherals
  • Integrated Field Programmable FLASH Memory Eliminates the Need for External Configuration Memory
  • Measures Charge Flow Using a High-Resolution, 16-Bit Integrating Delta-Sigma Converter
    • Better Than 0.65 nVh of Resolution
    • Self-Calibrating
  • Uses 16-Bit Delta-Sigma Converter for Accurate Voltage and Temperature Measurements
  • Extensive Data Reporting Options For Improved System Interaction
  • Optional Pulse Charging Feature for Improved Charge Times
  • Drives 3-, 4- or 5-Segment LED Display for Remaining Capacity Indication
  • Supports SHA-1 Authentication
  • Lifetime Data Logging
  • 30-Pin TSSOP (DBT)
  • APPLICATIONS
    • Notebook PCs
    • Medical and Test Equipment
    • Portable Instrumentation

IMPEDANCE TRACK is a trademark of Texas Instruments.

The bq20z90 SBS-compliant gas gauge IC, incorporating patented Impedance Track™ technology, is designed for battery-pack or in-system installation. The bq20z90 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals. The bq20z90 monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack, and 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, and minimize 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 remaining capacity to be calculated with discharge rate, temperature, and cell aging all accounted for during each stage of every cycle.

The bq20z90 SBS-compliant gas gauge IC, incorporating patented Impedance Track™ technology, is designed for battery-pack or in-system installation. The bq20z90 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals. The bq20z90 monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack, and 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, and minimize 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 remaining capacity to be calculated with discharge rate, temperature, and cell aging all accounted for during each stage of every cycle.

Download

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 21
Type Title Date
* Data sheet SBS 1.1 Compliant Gas Gauge Enabled w/Impedance Track Tech For bq29330 datasheet (Rev. A) 07 Jun 2006
* Errata bq20z90 Technical Reference 09 Jun 2006
* Errata bq20z90 EVM (HPA 155 Rev. A) Errata 07 Jun 2006
Application note SMBus Made Simple PDF | HTML 09 Nov 2016
EVM User's guide bq20z90EVM-001 SBS1.1 Impedance Track(TM) Technology (Rev. A) 04 Oct 2013
Application note Data Flash Programing and Calibrating the bq20zxx Family of Gas Gauges (Rev. E) 14 Sep 2013
Application note Thermistor Selection Guide for Texas Instruments Advanced Fuel Gauges 28 Sep 2011
Application note Cell Balancing Using the bq20zxx (Rev. C) 12 Jan 2011
Application note bq20z70, bq20z75, bq20z90, and bq20z95 Voltage Current & Measurement Accuracy 18 Mar 2008
Application note bq20z90-V110 to bq20z90-V150 Change List 11 Jan 2008
Application note Quick-Start Guide for bq20zxx Family Gas Gauges (Rev. A) 04 Sep 2007
Application note Configuring the bq20z90 Data Flash 20 Dec 2006
Application note bq20z70 and bq20z90 Application Book 13 Dec 2006
Application note Exploring the bq20z70/90 Impedance Track(TM) Evaluation Kit 27 Nov 2006
Application note Pack Assembly and the bq20zxx (Rev. B) 07 Nov 2006
Application note bq20z90 (v1.10) Change List 18 Oct 2006
Application note Evaluation 1: Impedance Track Gas Gauge for Novice – bq20z70/z90 09 Oct 2006
Application note bq20z70/90 Gas Gauge Circuit Design 23 Aug 2006
Application note Battery Pack Production Flow With bq20zXX 02 Aug 2006
Application note bq20z70/90 Printed-Circuit Board Layout Guide 02 Aug 2006
Application note Design 2: Avoiding ESD and EMI Problems in bq20zxx Battery Pack Electronics 11 Nov 2005

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

BQMTESTER — BQMTESTER Multi Channel Test and Program Board

The bqMTester from Texas Instruments is designed to calibrate and program electronic smart battery modules based on the bq20zxx and bq30zxx family of devices utilizing the patented Impedance Track ™ technology. The bqMTester software works in conjunction with the bqMTester HPA169 calibration board  (...)

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

bq20z90EVM-001 - bqEV-Easy SW Setup (Rev. D)

SLUC091D.ZIP (10084 KB)
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)
Package Pins Download
TSSOP (DBT) 30 View options

Ordering & quality

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

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos