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ML4812

Part Number	ML4812
Manufacturer	Fairchild
Description	Power Factor Controller
Published	May 7, 2005
Detailed Description	April 1998 ML4812 Power Factor Controller GENERAL DESCRIPTION The ML4812 is designed to optimally facilitate a peak cur...
Datasheet	ML4812 PDF File

Overview

April 1998 ML4812 Power Factor Controller GENERAL DESCRIPTION The ML4812 is designed to optimally facilitate a peak current control boost type power factor correction system.
Special care has been taken in the design of the ML4812 to increase system noise immunity.
The circuit includes a precision reference, gain modulator, error amplifier, overvoltage protection, ramp compensation, as well as a high current output.
In addition, start-up is simplified by an under-voltage lockout circuit with 6V hysteresis.
In a typical application, the ML4812 functions as a current mode regulator.
The current which is necessary to terminate the cycle is a product of the sinusoidal line voltage times the out...

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