Product details


Function Protection Number of series cells (Min) 2, 3 Number of series cells (Max) 3 Features Single pin output drive Typical operating current (Typ) (uA) 1 Rating Catalog Vin (Max) (V) 25 open-in-new Find other Battery protectors

Package | Pins | Size

WSON (DRV) 6 4 mm² 2 x 2 open-in-new Find other Battery protectors


  • 2-Series and 3-Series Cell Overvoltage Monitor for Secondary Protection
  • Fixed Programmable Delay Timer
  • Fixed OVP Threshold
    • Available Range From 3.85 V to 4.6 V
  • Fixed OVP Delay Option: 4 s or 6.5 s
  • High-Accuracy Overvoltage Protection:
    ±10 mV
  • Low Power Consumption ICC ≈ 1 µA
  • Low Leakage Current per Cell Input < 100 nA
  • Small Package Footprint
    • 6-Pin SON

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The bq2945xx family of products is a secondary-level voltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an overvoltage condition. Based on the configuration, an output is triggered after a fixed delay if any of the two or three cells has an overvoltage condition. This output is triggered into a high state after an overvoltage condition satisfies the specified delay timer.

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Technical documentation

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Type Title Date
* Datasheet bq2945xx Overvoltage Protection For 2-Series and 3-Series Cell Li-Ion Batteries datasheet (Rev. H) Dec. 05, 2017

Design & development

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

Hardware development


The bq294502EVM-033 is a complete evaluation system for the bq2945xy family of second-level protectors. The EVM includes one bq294502-based circuit module.The bq294502-based circuit module is a complete and compact example solution of a bq294502 second-level voltage protector. The circuit module (...)

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WSON (DRV) 6 View options

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