Home Power management Battery management ICs Battery fuel gauges
Home
Power management
Battery management ICs
Battery fuel gauges

BQ20Z95

NOT RECOMMENDED FOR NEW DESIGNS

SBS 1.1-Compliant Gas Gauge Enabled w/Impedance Track

Order now
Data sheet
Errata
BQ20Z95 is not recommended for new designs.
This product continues to be in production to support existing customers. Please consider one of these alternatives:
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 This product is a multi-cell gauge with newer hardware.

BQ20Z95

NOT RECOMMENDED FOR NEW DESIGNS
Data sheet Order now

Product details

We are not able to display this information. Please refer to the product data sheet.
  • Next Generation Patented Impedance Track Technology Accurately Measures
    Available Charge in Li-Ion and Li-Polymer Batteries
    • Better Than 1% Error Over Lifetime of the Battery
  • Supports the Smart Battery Specification
    SBS V1.1
  • Flexible Configuration for 2-Series to 4-Series Li-Ion and Li-Polymer
    Cells
  • Powerful 8-Bit RISC CPU With Ultra-Low Power Modes
  • Full Array of Programmable Protection Features
    • Voltage, Current, and Temperature
  • Supports SHA-1 Authentication
  • Complete Battery Protection and Gas Gauge Solution in One Package
  • Small 44-Pin TSSOP (DBT) Package
  • Next Generation Patented Impedance Track Technology Accurately Measures
    Available Charge in Li-Ion and Li-Polymer Batteries
    • Better Than 1% Error Over Lifetime of the Battery
  • Supports the Smart Battery Specification
    SBS V1.1
  • Flexible Configuration for 2-Series to 4-Series Li-Ion and Li-Polymer
    Cells
  • Powerful 8-Bit RISC CPU With Ultra-Low Power Modes
  • Full Array of Programmable Protection Features
    • Voltage, Current, and Temperature
  • Supports SHA-1 Authentication
  • Complete Battery Protection and Gas Gauge Solution in One Package
  • Small 44-Pin TSSOP (DBT) Package

The bq20z95 SBS-compliant gas gauge and protection IC is a single IC solution designed for battery-pack or in-system installation. The bq20z95 measures and maintains an accurate record of available charge in Li-Ion or Li-Polymer batteries using its integrated high-performance analog peripherals, monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack as well and 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 bq20z95 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 bq20z95 SBS-compliant gas gauge and protection IC is a single IC solution designed for battery-pack or in-system installation. The bq20z95 measures and maintains an accurate record of available charge in Li-Ion or Li-Polymer batteries using its integrated high-performance analog peripherals, monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack as well and 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 bq20z95 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.
open-in-new Find other Battery fuel gauges
Download

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 19
Type Title Date
* Data sheet SBS 1.1-Compliant Gas Gauge and Protection Enabled w/Impedance Track datasheet (Rev. C) 16 Oct 2013
* Errata Technical Reference (Rev. A) 06 Aug 2007
Application note Wide-Vin Battery-Charger Using SMBus MSP430 MCUs and bq Fuel Gauges (Rev. B) PDF | HTML 12 Jul 2019
Application note SMBus Made Simple PDF | HTML 09 Nov 2016
EVM User's guide bq20z95EVM-001 SBS 1.1 Impedance Track 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 Production 2: Data Flash Programming/Calibrating the bq20z80 Gas Gauges (Rev. B) (Rev. B) 12 Jan 2010
Application note Design 4: Support of Multiple Li-Ion Chemistries w/Impedance Track(TM) Gas Gauge (Rev. R) 15 Oct 2009
Application note Data Flash Programming Using the EV Software. (Rev. A) 27 Jul 2009
Application note Information to Provide When Reporting Issues With TI Gauges 18 Jul 2008
Application note 2-Series-Cell Considerations for Advanced Fuel Gauges 09 May 2008
Application note bq20z70, bq20z75, bq20z90, and bq20z95 Voltage Current & Measurement Accuracy 18 Mar 2008
Application note bq20z75/95 Printed Circuit Board Layout Guide 20 Dec 2007
Application note Quick-Start Guide for bq20zxx Family Gas Gauges (Rev. A) 04 Sep 2007
Application note bq29330 External Short Circuit Protection 22 Aug 2007
Application note Differences Between the bq20z70/z75/z80/z90/z95 Impedance TrackTM Gas Gauges 03 Apr 2007
Application note bq20z70 and bq20z90 Application Book 13 Dec 2006
Application note Thermistor Coefficient Calculator for TI Advanced Fuel Gauges 04 Oct 2006

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

bq20z95EVM - bqEV-Easy SW Setup (Rev. B)

SLUC108B.ZIP (9801 KB)
Download
Support software

bq20z95 Chemistry Updater

SLUC123.ZIP (73 KB)
Download
Support software

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

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

Mathcad Chemistry Selection Tool (Rev. DJ)

SLUC138DJ.ZIP (6840 KB)
Download
Package Pins Download
TSSOP (DBT) 44 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

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

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