A4942 - Three-Phase Sensorless Fan Driver

Allegro

Datasheet Details

TheA4942 three phase motor driver incorporates BEMF sensing to eliminate the requirement for Hall sensors in fan applications..

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 noise Package: 20-contact QFN (suffix ES) Not to scale.

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