A4942 Datasheet - Allegro

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

Datasheet Details

A4942

Allegro

0.96 MB

Three-phase sensorless fan driver.

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