Product details


Function Protection Number of series cells (Min) 2, 3, 4 Number of series cells (Max) 3, 4 Features Overvoltage, Undervoltage, Single pin output drive Typical operating current (Typ) (uA) 1 Rating Catalog Vin (Max) (V) 20 open-in-new Find other Battery protectors

Package | Pins | Size

WSON (DSG) 8 4 mm² 2 x 2 open-in-new Find other Battery protectors


  • 2-series, 3-series, and 4-series cell overvoltage protection (OVP)
  • Fixed delay timer to trigger FET drive output (3-s, 4-s, 5.5-s, or 6.5-s options)
  • Factory programmed OVP threshold (threshold range 3.85 V to 4.6 V)
  • Output options: active high
  • High-accuracy overvoltage protection: ±10 mV
  • Regulated supply output with self-disable and/or external enable/disable control
    • Options: 3.3 V, 2.5 V, and 1.8 V (BQ2961)
    • Options: 3.3 V, 3.15 V, 3.0 V (BQ2962)
  • Low power consumption ICC ~ 4 µA (VCELL(ALL) < VPROTECT)
  • Extra low power consumption with reg output disabled, ICC ~ 1.2 µA
  • Low leakage current per cell input < 100 nA
  • Small package footprint
    • 8-Pin WSON (2 mm × 2 mm)

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The BQ296xxx family is a high-accuracy, low-power overvoltage protector with a 2-mA regulated output supply for Li-ion battery pack applications.

Each cell in a 2-series to 4-series cell stack is individually monitored for an overvoltage condition. An internally fixed-delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, an output pin is triggered into an active state to indicate that an overvoltage condition has occurred.

The regulated output supply delivers up to 2-mA (max) output current to drive always-on circuits, such as a real-time clock (RTC) oscillator. The BQ296xxx family has a self-disable function to turn off the regulated output if any cell voltage falls below a certain threshold, thereby preventing drain on the battery, and provides an external control to enable or disable the regulated output.

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Technical documentation

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Type Title Date
* Datasheet BQ296xxx Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion Batteries with Regulated Output Supply datasheet (Rev. L) Feb. 05, 2021

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

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 (...)

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

CAD/CAE symbols

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WSON (DSG) 8 View options

Ordering & quality

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