ML4821 Datasheet PDF (Power Factor Controller) | Download Micro Linear ML4821

ML4821 - Power Factor Controller

Description

The ML4821 provides complete control for a “boost” type power factor correction system using the average current sensing method.

Special care has been taken in the design of the ML4821 to increase system noise immunity.

Features

s s s s s s s s s Average current sensing for lowest possible harmonic distortion Average line compensation with brown-out control Precision buffered 5V reference 1A peak current totem-pole output drive Overvoltage comparator eliminates output “runaway” due to load removal Wide common mode range in current sense comparators for better noise immunity Large oscillator amplitude for better noise immunity Output driver internally limited to 17V “Sleep mode” shutdown input.
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Datasheet Details

Part number	ML4821
Manufacturer	Micro Linear
File Size	177.31 KB
Description	Power Factor Controller
Datasheet	ML4821 Datasheet
Additional preview pages of the ML4821 datasheet.

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Full PDF Text Transcription

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May 1997 Micro Linear GENERAL DESCRIPTION The ML4821 provides complete control for a “boost” type power factor correction system using the average current sensing method. Special care has been taken in the design of the ML4821 to increase system noise immunity. The circuit includes a precision reference, gain modulator, average current error amplifier, output error amplifier, over-voltage protection comparator, shutdown logic, as well as a high current output. In addition, start-up is simplified by an under-voltage lockout circuit. In a typical application, the ML4821 controls the AC input current by adjusting the pulse width of the output MOSFET. This modulates the line current so that its shape conforms to the shape of the input voltage.

Published: May 7, 2005 |