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Product details

Parameters

Function Protection Number of series cells (Min) 2, 3 Number of series cells (Max) 3 Features Overvoltage, 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

Features

  • 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 (VCELL(ALL) < VPROTECT)
  • Low leakage current per cell input < 100 nA
  • Small package footprint
    • 6-pin SON
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Description

The BQ2945xy 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
* Data sheet BQ2945xy Overvoltage Protection For 2-Series and 3-Series Cell Li-Ion Batteries datasheet (Rev. I) May 24, 2021
User guide bq294502 EVM User's Guide Nov. 29, 2011

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
149
Description

The bq28z610 EVM evaluation module (EVM) is a complete evaluation system for the bq28z610 or bq294502 battery management system. The EVM includes one bq28z610 and bq294502 circuit module and a link to Windows™ based PC software. The circuit module includes one bq28z610  integrated circuit (...)

Features
  • Complete evaluation system for the bq78z100EVM 1s-2s Battery Pack Manager Evaluation Module and bq294502 independent overvoltage protection IC.
  • Populated circuit module for quick setup.
  • Software that allows data logging for system analysis.
EVALUATION BOARD Download
document-generic User guide
49
Description

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 (...)

EVALUATION BOARD Download
document-generic User guide
149
Description

The bq78z100EVM-532 evaluation module (EVM) is a complete evaluation system for the bq78z100 or bq294502 battery management system. The EVM includes one bq78z100 and bq294502 circuit module and a link to Windows™ based PC software. The circuit module includes one bq78z100  integrated (...)

Features
  • Complete evaluation system for the bq78z100EVM 1s-2s Battery Pack Manager Evaluation Module and bq294502 independent overvoltage protection IC
  • Populated circuit module for quick setup
  • Software that allows data logging for system analysis

Reference designs

REFERENCE DESIGNS Download
1 to 2s HDQ Li-Ion Battery Pack Manager Reference Design
TIDA-00884 — The Texas Instruments bq78z100 device is a Battery Pack Manager that integrates gas gauging, and protection for complete autonomous operation of 1-series to 2-series cell Li-Ion and Li-Polymer battery packs. The architecture enables communication between the fuel gauging processor and an external (...)
document-generic Schematic
REFERENCE DESIGNS Download
1 to 2s I2C Li-Ion Battery Pack Manager Reference Design
TIDA-00895 — The Texas Instruments bq28z610 device is a Battery Pack Manager that integrates gas gauging, and protection for complete autonomous operation of 1-series to 2-series cell Li-Ion and Li-Polymer battery packs. The architecture enables communication between the fuel gauging processor and an internal (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
WSON (DRV) 6 View options

Ordering & quality

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