A4941

Three-Phase Sensorless Fan Driver

Allegro Micro Systems

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

A4941 General Description

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 Datasheet (665.21 KB)

A4941 Datasheet Preview — Preview of A4941 PDF

Datasheet Details

Part number:

A4941

Manufacturer:

Allegro Micro Systems

File Size:

665.21 KB

Description:

Three-phase sensorless fan driver.

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A4941 Three-Phase Sensorless Fan Driver Allegro Micro Systems

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A4941 Features

A4941 General Description

Datasheet Details

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