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A4941 - Three-Phase Sensorless Fan Driver

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Allegro Micro Systems

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A4941 Three-Phase Sensorless Fan Driver by Allegro Micro Systems - Datasheet Preview — Datasheet preview – A4941

Datasheet Details

Part number	A4941
Manufacturer	Allegro Micro Systems
File Size	665.21 KB
Description	Three-Phase Sensorless Fan Driver
Datasheet	A4941 Datasheet
Additional preview pages of the A4941 datasheet.

Product details

Description

The A4941 three-phase motor driver incorporates BEMF sensing to eliminate the requirement for Hall sensors in fan applications.

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.
Variant A automotive qualified to AEC-Q100 Grade 2.

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