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ML4426

Part Number	ML4426
Manufacturer	Micro Linear
Description	Bi-directional Sensorless BLDC Motor Controller
Published	May 7, 2005
Detailed Description	July 2000 ML4426* Bi-directional Sensorless BLDC Motor Controller GENERAL DESCRIPTION The ML4426 PWM motor controller p...
Datasheet	ML4426 PDF File

Overview

July 2000 ML4426* Bi-directional Sensorless BLDC Motor Controller GENERAL DESCRIPTION The ML4426 PWM motor controller provides all of the functions necessary for starting and controlling the speed of delta or wye wound Brushless DC (BLDC) motors without Hall Effect sensors.
Back EMF voltage is sensed from the motor windings to determine the proper commutation phase sequence using a PLL.
This patented sensing technique will commutate a wide range of 3Phase BLDC motors and is insensitive to PWM noise and motor snubbing circuitry.
The ML4426 limits the motor current using a constant offtime PWM control loop.
The velocity loop is controlled with an onboard amplifier.
The ML4426 has circuitry to...

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