BQ3050 SBS 1.1-Compliant 2S to 4S Battery Gas Gauge & Protection |

BQ3050 (NRND)

SBS 1.1-Compliant 2S to 4S Battery Gas Gauge & Protection


Not Recommended for New Designs (NRND)

Replaced By BQ40Z50-R1 – The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.

TI does not recommend using this part in a new design. This product continues to be in production to support existing customers.


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.


  • 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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