A4941 Datasheet - Allegro Micro Systems

A4941, Three-Phase Sensorless Fan Driver

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.

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A4941-AllegroMicroSystems.pdf

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Datasheet Details

Part number:

A4941

Manufacturer:

Allegro Micro Systems

File Size:

665.21 KB

Description:

Three-Phase Sensorless Fan Driver

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

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 used as an on/off switch to disable motor operation and place the IC into a low power standby mode. The A4941 is provided in a 16-

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A4941 Three-Phase Sensorless Fan Driver Allegro Micro Systems

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