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BQ29200DRBT

Voltage Protection with Automatic Cell Balance For 2-Cell Li-Ion Batteries, OVP=4.35V

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BQ29200DRBT General Description

The bq2920x device is a secondary overvoltage protection IC for 2-series cell lithium-ion battery packs that incorporates a high-accuracy precision overvoltage detection circuit and automatic cell imbalance correction.

The voltage of each cell in a 2-series cell battery pack is compared to a factory programmed internal reference voltage. If either cell reaches an overvoltage condition, the OUT pin changes from low to high state.

The bq2920x can perform automatic voltage-based cell imbalance correction. Balancing can start when the cell voltages are different by nominally 30 mV or more and stops when the difference is nominally 0 mV. Cell balancing is enabled and disabled by the CB_EN pin.

Texas Instruments, Inc Inventory

Key Features

  • 2-Series Cell Secondary Protection
  • Automatic Cell Imbalance Correction with External
    Enable Control
    • ±30-mV Enable, 0-mV Disable Thresholds
      Typical
  • External Capacitor-Controlled Delay Timer
  • External Resistor-Controlled Cell Balance Current
  • Low Power Consumption ICC < 3 µA Typical
    (VCELL(ALL) < VPROTECT)
  • Internal Cell Balancing Handles Current
    up to 15 mA
  • External Cell Balancing Mode Supported
  • High-Accuracy Overvoltage Protection:
    • ±25 mV with TA = 0°C to 60°C
  • Fixed Overvoltage Protection Thresholds:
    4.30 V, 4.35 V
  • Small 8L DRB Package
Texas Instruments, Inc Original Stock
Texas Instruments, Inc Inventory

Specifications

Category Integrated Circuits (ICs)Power Management (PMIC)Battery Management Mfr Texas Instruments
Series - Package Tape & Reel (TR)Cut Tape (CT)Digi-Reel®
Product Status Active Function Battery Protection
Battery Chemistry Lithium Ion Number of Cells 2
Fault Protection Over Voltage Interface -
Operating Temperature -40°C ~ 110°C (TA) Mounting Type Surface Mount
Package / Case 8-VDFN Exposed Pad Supplier Device Package 8-SON (3x3)
Base Product Number BQ29200

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