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A5944 - Three-Phase Sensorless Fan Driver

Description

The A5944 three-phase motor drivers incorporate sinusoidal drive to minimize audible noise and vibration for medium power 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 desired speed.

Features

  • Sinusoidal drive for low audible noise.
  • Quiet startup adjustment feature.
  • High efficiency control algorithm.
  • Sensorless operation.
  • PWM speed input.
  • FG speed output.
  • Lock detection.
  • Short-circuit protection.
  • Standby mode.

📥 Download Datasheet

Datasheet Details

Part number A5944
Manufacturer Allegro
File Size 641.61 KB
Description Three-Phase Sensorless Fan Driver
Datasheet download datasheet A5944 Datasheet

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Other Datasheets by Allegro

Part Number Description
A5940 Three Phase Sensorless Sinusoidal Fan Driver
A5941 Three-Phase Sensorless Fan Driver
A5943 Three Phase Sinusoidal 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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A5944 Three-Phase Sensorless Fan Driver FEATURES AND BENEFITS • Sinusoidal drive for low audible noise • Quiet startup adjustment feature • High efficiency control algorithm • Sensorless operation • PWM speed input • FG speed output • Lock detection • Short-circuit protection • Standby mode PACKAGE: 10-contact 3 mm × 3 mm DFN package with exposed thermal pad (suffix EJ) DESCRIPTION The A5944 three-phase motor drivers incorporate sinusoidal drive to minimize audible noise and vibration for medium power 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 desired speed. The voltage profile is selectable via pin SOFTST to allow proper operation with a wide range of motor characteristics.
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