Product details


Cell chemistry Li-Ion/Li-Polymer Number of series cells 2-4 Cells Communication interface SMBus Battery capacity (Min) (mAh) 500 Battery capacity (Max) (mAh) 32000 Implementation Pack External capacity indication LED Features Integrated Protector, SHA-1 Authentication Operating temperature range (C) -40 to 85 open-in-new Find other Battery fuel gauges

Package | Pins | Size

TSSOP (DBT) 38 43 mm² 9.7 x 4.4 open-in-new Find other Battery fuel gauges


  • Fully Integrated 2-Series, 3-Series, and 4-Series
    Li-Ion or Li-Polymer Cell Battery Pack Manager
    and Protection
  • Advanced Compensated End-of-Discharge
    Voltage (CEDV) Gauging
  • High Side N-CH Protection FET Drive
  • Integrated Pre-Charge FET
  • Integrated Cell Balancing
  • Low Power Modes
    • Low Power: < 180 µA
    • Sleep < 76 µA
  • Full Array of Programmable Protection Features
    • Voltage
    • Current
    • Temperature
  • Sophisticated Charge Algorithms
    • JEITA
    • Enhanced Charging
    • Adaptive Charging
  • Supports Two-Wire SMBus v1.1 Interface
  • SHA-1 Authentication
  • Compact Package: 38-Lead TSSOP
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The Texas Instruments bq3050 Compensated End-of-Discharge Voltage (CEDV) Gas Gauge and Battery Pack Manager is a single-chip solution that provides a rich array of features for protection, authentication, and data gathering for 2-series, 3-series, and 4-series cell Li-Ion and Li-Polymer battery packs.

Using its integrated high-performance analog peripherals, the bq3050 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 bq3050 provides software-based 1st-level and 2nd-level safety protection for overvoltage, undervoltage, overtemperature, and overcharge conditions, as well as hardware-based protection for overcurrent in discharge and short circuit in charge and discharge conditions.

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

The compact 38-lead TSSOP 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

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Type Title Date
* Datasheet bq3050 CEDV Gas Gauge and Battery Pack Manager for 2-Series, 3-Series, and 4-Series Li-Ion Batteries datasheet (Rev. D) May 29, 2015
User guide bq3050 Technical Reference Manual (Rev. A) Jun. 30, 2016
User guide bq3050 Evaluation Software Feb. 03, 2012
User guide bq3050 EVM User's Guide (Rev. A) Dec. 07, 2011

Design & development

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

Hardware development

document-generic User guide

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 (...)

  • Programs and Calibrates Smart Battery Modules Based on the Following Devices: BQ20z40 (...)

Software development

Gauging Parameter Calculator for CEDV gauges
GPCCEDV Gauging Parameter Calculator (GPC) is a math calculation and simulation tool that helps the battery designer to obtain matching Compensated End of Discharge Voltage (CEDV) coefficients for the specific battery profile. The tool allows the user to increase the accuracy of the fuel gauge IC over (...)
SLUC328.ZIP (47 KB)

Design tools & simulation

document-generic User guide

CAD/CAE symbols

Package Pins Download
TSSOP (DBT) 38 View options

Ordering & quality

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

Support & training

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