Product details

Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells 2-4 Cells, Single Cell Communication interface SMBus Battery capacity (Min) (mAh) 100 Battery capacity (Max) (mAh) 29000 Implementation Pack External capacity indication LED Features Cell Balancing, Impedance Track™ algorithm, Integrated Protector, SHA-1 Authentication, Turbo Mode Operating temperature range (C) -40 to 85 Cell balancing External, Internal
Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells 2-4 Cells, Single Cell Communication interface SMBus Battery capacity (Min) (mAh) 100 Battery capacity (Max) (mAh) 29000 Implementation Pack External capacity indication LED Features Cell Balancing, Impedance Track™ algorithm, Integrated Protector, SHA-1 Authentication, Turbo Mode Operating temperature range (C) -40 to 85 Cell balancing External, Internal
VQFN (RSM) 32 16 mm² 4 x 4
  • Fully integrated 1-series, 2-series, 3-series, and 4-series Li-ion or Li-polymer cell battery pack manager and protection
  • Next-generation patented Impedance Track™ technology accurately measures available charge in Li-ion and Li-polymer batteries
  • High-side N-CH protection FET drive
  • Integrated cell balancing while charging or at rest
  • Suitable for batteries between 100 mAh and 29 Ah
  • Full array of programmable protection features
    • Voltage
    • Current
    • Temperature
    • Charge timeout
    • CHG/DSG FETs
    • AFE
  • Sophisticated charge algorithms
    • JEITA
    • Enhanced charging
    • Adaptive charging
    • Cell balancing
  • Supports TURBO Mode 2.0
  • Supports battery trip point (BTP)
  • Diagnostic lifetime data monitor and black box recorder
  • LED display
  • Supports two-wire SMBus v1.1 interface
  • SHA-1 authentication
  • IATA support
  • Compact package: 32-lead QFN (RSM)
  • Fully integrated 1-series, 2-series, 3-series, and 4-series Li-ion or Li-polymer cell battery pack manager and protection
  • Next-generation patented Impedance Track™ technology accurately measures available charge in Li-ion and Li-polymer batteries
  • High-side N-CH protection FET drive
  • Integrated cell balancing while charging or at rest
  • Suitable for batteries between 100 mAh and 29 Ah
  • Full array of programmable protection features
    • Voltage
    • Current
    • Temperature
    • Charge timeout
    • CHG/DSG FETs
    • AFE
  • Sophisticated charge algorithms
    • JEITA
    • Enhanced charging
    • Adaptive charging
    • Cell balancing
  • Supports TURBO Mode 2.0
  • Supports battery trip point (BTP)
  • Diagnostic lifetime data monitor and black box recorder
  • LED display
  • Supports two-wire SMBus v1.1 interface
  • SHA-1 authentication
  • IATA support
  • Compact package: 32-lead QFN (RSM)

The BQ40Z50-R2 device, incorporating patented Impedance Track™ technology, is a fully integrated, single-chip, pack-based solution that provides a rich array of features for gas gauging, protection, and authentication for 1-series, 2-series, 3-series, and 4-series cell Li-ion and Li-polymer battery packs.

Using its integrated high-performance analog peripherals, the BQ40Z50-R2 device measures and maintains an accurate record of available capacity, voltage, current, temperature, and other critical parameters in Li-ion or Li-polymer batteries, and reports this information to the system host controller over an SMBus v1.1 compatible interface.

The BQ40Z50-R2 device, incorporating patented Impedance Track™ technology, is a fully integrated, single-chip, pack-based solution that provides a rich array of features for gas gauging, protection, and authentication for 1-series, 2-series, 3-series, and 4-series cell Li-ion and Li-polymer battery packs.

Using its integrated high-performance analog peripherals, the BQ40Z50-R2 device measures and maintains an accurate record of available capacity, voltage, current, temperature, and other critical parameters in Li-ion or Li-polymer batteries, and reports this information to the system host controller over an SMBus v1.1 compatible interface.

Download
Information

More information

The latest firmware release is now available Request now

Similar products you might be interested in

open-in-new Compare products
Pin-for-pin with same functionality to the compared device.
BQ20Z90-V150 ACTIVE SBS v1.1 compliant gas gauge for use with the bq29330 Does not support single cell SBS v1.1 compliant gas gauge for use with the BQ29330

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 18
Type Title Date
* Data sheet BQ40Z50-R2 1-Series, 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager datasheet (Rev. C) 16 Apr 2021
* User guide BQ40Z50-R2 Technical Reference Manual (Rev. B) 12 Oct 2018
Application note Autonomous Smart Battery Guide 15 Oct 2021
User guide BQ40Z50-R4 Technical Reference Manual 31 Mar 2021
Analog design journal Multibattery management in medical ultrasound systems (Rev. A) 21 Jan 2021
Application note Advanced Charge Algorithm Application Note 02 Aug 2018
Application note Achieving The Successful Learning Cycle 19 Jun 2018
Application note Simple Guide to Chemical ID Selection Tool (GPC) (Rev. A) 05 Jun 2018
Application note bq40z50-R2 v2.08 to v2.11 Change List (Rev. A) 24 Apr 2018
User guide bq40z50-R2 v2.08 Required Changes 11 Oct 2017
Application note bq40z50-R1 to bq40z50-R2 Change List 13 Jul 2017
Application note Gauge Communication 12 Jan 2017
Application note Turbo Mode 1.0 Setup Steps 13 Dec 2016
Application note SMBus Made Simple 09 Nov 2016
User guide bq40z50EVM Li-Ion Battery Pack Manager Evaluation Module (Rev. B) 20 Sep 2016
Application note bq40z50 Data Memory Programming for Mass Production 01 Apr 2015
Application note bq40zxx Manufacture, Production, and Calibration (Rev. A) 23 Mar 2015
Application note bq40z50 Advanced Gas Gauge Circuit Design (Rev. A) 23 Sep 2014

Design & development

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

Evaluation board

BQ40Z50EVM-561 — BQ40Z50 evaluation board 

BQ40z50EVM is a complete system useful for evaluating the functionality of the bq40z50 fuel gauge. As described on the BQ40z50 product folder, this gauge is appropriate for applications powered by multi-cell battery systems. The EVM includes one bq40z50 circuit module, a current sense resistor, and (...)

Out of stock on TI.com
Application software & framework

GPCCHEM — Gauging Parameter Calculator: Match chemistry for Impedance Track gauges

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 (...)

Firmware

BQ40Z50-R3-DEVICE-FW — BQ40Z50-R3 device firmware: 1-4 series Li-ion battery pack manager | battery fuel (gas) gauge

Newer BQ40z50-R4 FW available here

The BQ40Z50-R3 is a FW only release that can be flashed onto any existing BQ40Z50 hardware such as the BQ40Z50-R2, BQ40Z50-R1, or BQ40Z50 device. The firmware incorporates the patented Impedance Track™ technology to create a pack-based solution that provides (...)
Firmware

BQ40Z50-R4-DEVICE-FW — BQ40Z50-R4 device firmware: 1-4 series Li-ion battery pack manager | battery fuel (gas) gauge

The BQ40Z50-R4-DEVICE-FW is a firmware-only release that can be flashed onto any existing BQ40Z50 hardware such as the BQ40Z50-R2, BQ40Z50-R1, or BQ40Z50 device. The firmware incorporates the patented Impedance Track™ technology to create a pack-based solution that provides a rich array (...)
Firmware

bq40z50-R2 Gauging Embedded Firmware v2.11

SLUC649.ZIP (4243 KB)
Reference designs

TIDA-00883 — 1 to 4 Series Cell Li-Ion Battery Pack Manager Reference Design

The Texas Instruments bq40z50-R1 device is a Battery Pack Manager that integrates gas gauging, and protection for completely autonomous operation of 1-series to 4-series cell Li-Ion and Li-Polymer battery packs. The architecture enables communication between the fuel gauging processor and an (...)
Package Pins Download
VQFN (RSM) 32 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