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Product details

Parameters

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 open-in-new Find other Battery fuel gauges

Package | Pins | Size

VQFN (RSM) 32 16 mm² 4 x 4 open-in-new Find other Battery fuel gauges

Features

  • 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
  • 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 BOOST Mode
  • 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
  • Compact Package: 32-Lead QFN (RSM)

All trademarks are the property of their respective owners.

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Description

The BQ40Z50 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 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 device supports TURBO BOOST mode by providing the available max power and max current to the host system. The device also supports Battery Trip Point to send a BTP interrupt signal to the host system at the pre-set state of charge thresholds.

The BQ40Z50 provides software-based 1st- and 2nd-level safety protection against overvoltage, undervoltage, overcurrent, short-circuit current, overload, and overtemperature conditions, as well as other pack- and cell-related faults.

SHA-1 authentication, with secure memory for authentication keys, enables identification of genuine battery packs.

The compact 32-lead QFN package minimizes solution cost and size for smart batteries while providing maximum functionality and safety for battery gauging applications.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 13
Type Title Date
* Datasheet BQ40Z50 1-Series, 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager datasheet (Rev. B) Nov. 12, 2019
* User guides bq40z50 Technical Reference Manual (Rev. A) Jun. 01, 2015
Application notes Collecting IVT Data for Testing Jul. 12, 2019
Application notes Advanced Charge Algorithm Application Note Aug. 02, 2018
User guides TI Fuel Gauge Authentication Key Packager and Programmer Tools Jun. 29, 2018
User guides bq40z50EVM Li-Ion Battery Pack Manager Evaluation Module (Rev. B) Sep. 20, 2016
Technical articles It’s a dirty job, but nobody’s gotta do it: Rise of the (domestic) robots Jul. 29, 2015
Application notes bq40z50 to bq40z50-R1 Change List Jul. 29, 2015
Technical articles Battery Terms Decoded Part 2 Apr. 08, 2015
Application notes bq40z50 Data Memory Programming for Mass Production Apr. 01, 2015
Application notes bq40zxx Manufacture, Production, and Calibration (Rev. A) Mar. 23, 2015
Technical articles Battery Terms Decoded: Part 1 Mar. 06, 2015
Application notes bq40z50 Advanced Gas Gauge Circuit Design (Rev. A) Sep. 23, 2014

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
99
Description

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 (...)

Features
  • Populated circuit module for quick setup
  • Software allows data logging for system analysis
  • Complete evaluation system for the bq40z50 battery management IC

Software development

APPLICATION SOFTWARE & FRAMEWORKS Download
Production tool for 4th generation multicell battery fuel (gas) gauges
BQPRODUCTION bqProduction offers a full suite of robust tools to assist with the process of configuring, calibrating, manufacturing and tracking printed circuit boards utilizing TI Battery Battery management products. This includes features that allow writing a golden image followed by different types of (...)
Features
  • Support for the EV2300 Works with Advanced bqMTester hardware
  • Control multiple stations from a single graphical user interface
  • Run up to 12 stations in parallel from a single computer
  • Uses industry standard Motorola srec format Golden image programmer
  • Calibration and test automation Unique Serial number (...)
APPLICATION SOFTWARE & FRAMEWORKS Download
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 (...)

APPLICATION SOFTWARE & FRAMEWORKS Download
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 (...)
APPLICATION SOFTWARE & FRAMEWORKS Download
Gauging Parameter Calculator: Optimize room and low temp performance Impedance Track gauges
GPCRB Gauging Parameter Calculator – Optimize room and low temperature performance for Impedance track gas gauges (GPCRB) is a math calculation tool that helps the battery designer to refine the Impedance Track battery gauge parameters for a given battery profile. Depending on the input log file, it (...)
APPLICATION SOFTWARE & FRAMEWORKS Download
SLUC665.ZIP (135883 KB)
FIRMWARE Download
BQ40Z50-R3 device firmware: 1-4 Series li-ion battery pack manager | battery fuel (gas) gauge
BQ40Z50-R3-DEVICE-FW — 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 a rich array of features for gas (...)
Features
  • The BQ40Z50-R3 firmware is usable on any previous version of the BQ40Z50 hardware
  • Supports Intel® dynamic battery power technology (Intel® DBPT) version 3.0 by providing the available max power, max current, Vload and Rhfeffective
  • New expanded lifetime logging capabilities with customer configurable (...)
FIRMWARE Download
SLUC666.ZIP (140691 KB)
SUPPORT SOFTWARE Download
SLUC564FW.ZIP (2777 KB)
SUPPORT SOFTWARE Download
SLUC671.ZIP (4261 KB)

CAD/CAE symbols

Package Pins Download
VQFN (RSM) 32 View options

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