A4942

Three-Phase Sensorless Fan Driver

Allegro

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 General Description

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 Datasheet (0.96 MB)

A4942 Datasheet Preview — Preview of A4942 PDF

Datasheet Details

Part number:

A4942

Manufacturer:

Allegro

File Size:

0.96 MB

Description:

Three-phase sensorless fan driver.

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A4942 Three-Phase Sensorless Fan Driver Allegro

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A4942 Features

A4942 General Description

Datasheet Details

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Description:

A4942 Distributor