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A5941 - Three-Phase Sensorless Fan Driver

General Description

The A5941 three-phase motor driver incorporates sinusoidal drive to minimize audible noise and vibration for mediumpower fans.

A sinusoidal voltage profile is applied to the windings of the motor at startup to quietly start and gradually ramp up the motor to the desired speed.

Key Features

  • AEC-Q100 qualified (K version).
  • Quiet startup.
  • 180° sinusoidal drive for low audible noise.
  • High-efficiency control algorithm.
  • Sensorless operation.
  • Wide supply voltage range.
  • FG speed output.
  • Lock detection.
  • Overcurrent protection.
  • Soft start.
  • Short-circuit protection.

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Other Datasheets by Allegro MicroSystems

Part Number Description
A5940 Three Phase Sensorless Sinusoidal Fan Driver
A5943 Three Phase Sinusoidal Fan Driver
A5944 Three-Phase Sensorless Fan Driver
A5947-B Three-Phase Sensorless Fan Driver
A5947G Three-Phase Sensorless Fan Driver

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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A5941 Three-Phase Sensorless Fan Driver FEATURES AND BENEFITS • AEC-Q100 qualified (K version) • Quiet startup • 180° sinusoidal drive for low audible noise • High-efficiency control algorithm • Sensorless operation • Wide supply voltage range • FG speed output • Lock detection • Overcurrent protection • Soft start • Short-circuit protection PACKAGES: 10-Pin SOIC with Exposed Pad (suffix LK) DESCRIPTION The A5941 three-phase motor driver incorporates sinusoidal drive to minimize audible noise and vibration for mediumpower fans. A sinusoidal voltage profile is applied to the windings of the motor at startup to quietly start and gradually ramp up the motor to the desired speed. The voltage profile is set to a default value that will operate for a wide range of motor characteristics.