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A5947-B Datasheet Three-Phase Sensorless Fan Driver

Manufacturer: Allegro MicroSystems

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General Description

The A5947-B three phase motor driver IC incorporates sensorless sinusoidal drive to minimize vibration for a wide variety of fan applications.

Sensorless control eliminates the requirement for Hall sensors.

A flexible closed-loop speed control system is integrated into the IC.

Overview

A5947-B Three-Phase Sensorless Fan Driver IC.

Key Features

  • AEC-Q100 qualified.
  • Speed curve configuration via EEPROM.
  • I2C serial port.
  • Sinusoidal modulation for reduced audible noise and low vibration.
  • Sensorless (no Hall sensors required).
  • Low RDS(ON) power MOSFETs.
  • 3.3 V / 20 mA linear regulator.
  • PWM or analog speed input.
  • FG speed output.
  • Slew rate control.
  • Lock detection.
  • Soft start.
  • Low power standby mode.
  • Overcurrent protec.

More Datasheets from Allegro MicroSystems

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