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A4942 Three-Phase Sensorless Fan Driver

A4942 Description

A4942 Three-Phase Sensorless Fan Driver .
TheA4942 three phase motor driver incorporates BEMF sensing to eliminate the requirement for Hall sensors in fan applications.

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

A4942 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 controlled by duty cycle demand applied to the PWM input. The PWM input is allowed to operate over a wide frequency range. Curre

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Datasheet Details

Part number
A4942
Manufacturer
Allegro
File Size
0.96 MB
Datasheet
A4942-Allegro.pdf
Description
Three-Phase Sensorless Fan Driver

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📌 All Tags

Three-Phase Sensorless Fan Driver Allegro
Allegro A4942-like datasheet