A4941 Datasheet - Allegro Micro Systems

A4941 - Three-Phase Sensorless Fan Driver

The A4941 three-phase motor driver incorporates BEMF sensing to eliminate the requirement for Hall sensors in fan applications.

A pulse wave modulated (PWM) input is provided to control motor speed, allowing system cost savings by eliminating external variable power supply.

PWM input can also be use

A4941 Features

* Sensorless (no Hall sensors required)

* Soft switching for reduced audible noise

* Minimal external components

* PWM speed input

* FG speed output

* Low power standby mode

* Lock detection

* Optional overcurrent protection

* V

Datasheet Details

A4941

Allegro Micro Systems

665.21 KB

Three-phase sensorless fan driver.

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