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ML4411A - Sensorless Spindle Motor Controller

This page provides the datasheet information for the ML4411A, a member of the ML4411 Sensorless Spindle Motor Controller family.

Datasheet Summary

Description

The ML4411 provides complete commutation for delta or wye wound Brushless DC (BLDC) motors without the need for signals from Hall Effect Sensors.

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Datasheet preview – ML4411A

Datasheet Details

Part number ML4411A
Manufacturer Micro Linear
File Size 296.51 KB
Description Sensorless Spindle Motor Controller
Datasheet download datasheet ML4411A Datasheet
Additional preview pages of the ML4411A datasheet.

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Full PDF Text Transcription

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May 1997 ML4411*/ML4411A** Sensorless Spindle Motor Controller GENERAL DESCRIPTION The ML4411 provides complete commutation for delta or wye wound Brushless DC (BLDC) motors without the need for signals from Hall Effect Sensors. This IC senses the back EMF of the three motor windings (no neutral required) to determine the proper commutation phase angle using Phase Lock Loop techniques. This technique will commutate virtually any 3-phase BLDC motor and is insensitive to PWM noise and motor snubbing. The ML4411 is architecturally similar to the ML4410 but with improved braking and brown-out recovery circuitry. Included in the ML4411 is the circuitry necessary for a Hard Disk Drive microcontroller driven control loop.
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