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A5931 - Three-Phase Sensorless Fan Driver

General Description

TheA5931 three-phase motor driver IC incorporates sensorless sinusoidal drive to minimize vibration for high speed server fans.

Sensorless control eliminates the requirement for Hall sensors for server fan applications.

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

Key Features

  • AEC-Q100 qualified (K version).
  • Closed-loop speed control.
  • 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 A capability.
  • Minimal external components.
  • PWM speed input.
  • FG speed output.
  • RD rotor lock output.
  • Lock detection.
  • Soft start.

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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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A5931 Three-Phase Sensorless Fan Driver IC FEATURES AND BENEFITS • AEC-Q100 qualified (K version) • Closed-loop speed control • 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 A capability • Minimal external components • PWM speed input • FG speed output • RD rotor lock output • Lock detection • Soft start • Standby mode • Shorted load protection PACKAGES: DESCRIPTION TheA5931 three-phase motor driver IC incorporates sensorless sinusoidal drive to minimize vibration for high speed server fans. Sensorless control eliminates the requirement for Hall sensors for server fan applications.