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A5931 and A5931-3: Three Phase Sensorless Fan Drivers

A5931 Product Image

A5931-A5931-3 ECAD Model
A5931 Datasheet
A5931-3 Datasheet
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Description

Top Features

Packaging

The A5931 is a three phase sensorless BLDC fan driver IC that incorporates sinusoidal drive to minimize audible noise and vibration. 

The A5931-3 is the latest in the family with a new feature that allows user to adjust deceleration speed from Force Open Loop to Close Loop.

A flexible closed-loop speed control system is integrated into the IC. This eliminates the requirement for a microprocessor-based system and minimizes programming requirements.

The A5931 devices are available in both commercial and automotive grade.

  • 180° sinusoidal drive - Low audible noise and vibration
  • Motor position using Allegro's sensorless algorithm - Eliminates external Hall sensors
  • Closed-loop speed control
  • Speed curve configuration via EEPROM
  • Lock detection
  • Soft start
  • Standby mode
  • Shorted load protection
A5931 Packages

LP Package Documentation

ES Package Documentation

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Part Number Specifications and Availability

Documentation and Resources

Design Tools

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Documents Found: 32
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User Guide
A5931 Evaluation Board User Guide
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