A4945 Datasheet - Allegro

A4945 - Three Phase Sensorless Sinusoidal Fan Driver

The A4945 and A4949 three phase motor drivers incorporate sinusoidal drive to minimize audible noise and vibration for medium power fans.

A Speed input is provided to control motor speed.

This allows system cost savings by eliminating an external variable power supply.

Alternatively, power supply mo

A4945 Features

* 180° sinusoidal drive for low audible noise

* High efficiency control algorithm

* Sensorless operation

* Analog Speed input (A4945)

* PWM Speed input (A4949)

* Wide supply voltage range

* FG speed output

* Lock detection

* Ove

Datasheet Details

A4945

Allegro

932.32 KB

Three phase sensorless sinusoidal fan driver.

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