A4942 - Three-Phase Sensorless Fan Driver

Product Overview

Allegro

Part number	A4942
Manufacturer	Allegro
File Size	0.96 MB
Description	Three-Phase Sensorless Fan Driver
Datasheet	A4942 Datasheet
Additional preview pages of the A4942 datasheet.

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.

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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Published: Dec 30, 2024 |