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ML4428

Micro Linear
Part Number ML4428
Manufacturer Micro Linear
Description Sensorless Smart-Start BLDC PWM Motor Controller
Published May 7, 2005
Detailed Description April 1997 PRELIMINARY ML4428* Sensorless Smart-Start™ BLDC PWM Motor Controller GENERAL DESCRIPTION The ML4428 motor c...
Datasheet PDF File ML4428 PDF File

ML4428
ML4428

Overview
April 1997 PRELIMINARY ML4428* Sensorless Smart-Start™ BLDC PWM Motor Controller GENERAL DESCRIPTION The ML4428 motor controller provides all of the functions necessary for starting and controlling the speed of delta or wye-wound Brushless DC (BLDC) Motors without the need for Hall Effect sensors.
Back-EMF voltage is sensed from the motor windings to determine the proper commutation phase sequence using PLL techniques.
The patented back-EMF sensing technique used will commutate virtually any 3-phase BLDC motor that has at least a 30% variation in inductance during rotation and is insensitive to PWM noise and motor snubbing circuitry.
The ML4428 also utilizes a patented start-up technique wh...


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