A4942 Datasheet (Allegro) - Three-Phase Sensorless Fan Driver

A4942, Three-Phase Sensorless Fan Driver

TheA4942 three phase motor driver incorporates BEMF sensing to eliminate the requirement for Hall sensors in fan applications.

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

This allows accurate setting of maximum and minimum speeds via selection of external resistors.

The speed is co

A4942 Features

* Sensorless (no Hall sensors required)

* Closed loop speed control

* Minimal external components

* PWM speed input

* FG speed output

* Lock detection

* Soft start

* Overcurrent protection

* Soft switching for reduced audible no