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ML4819 - Power Factor and PWM Controller Combo

Datasheet Summary

Description

The ML4819 is a complete boost mode Power factor Controller (PFC) which also contains a PWM controller.

The PFC circuit is similar to the ML4812 while the PWM controller can be used for current or voltage mode control for a second stage converter.

Features

  • s s s s s s s Large oscillator amplitude for better noise immunity Precision duty cycle limit for PWM section Current input gain modulator improves noise immunity Programmable Ramp Compensation circuit Over-Voltage comparator helps prevent output “runaway” BLOCK.

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Datasheet preview – ML4819

Datasheet Details

Part number ML4819
Manufacturer Fairchild
File Size 269.25 KB
Description Power Factor and PWM Controller Combo
Datasheet download datasheet ML4819 Datasheet
Additional preview pages of the ML4819 datasheet.

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Full PDF Text Transcription

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May 1997 ML4819 Power Factor and PWM Controller “Combo” GENERAL DESCRIPTION The ML4819 is a complete boost mode Power factor Controller (PFC) which also contains a PWM controller. The PFC circuit is similar to the ML4812 while the PWM controller can be used for current or voltage mode control for a second stage converter. Since the PWM and PFC circuits share the same oscillator, synchronization of the two stages is inherent. The outputs of the controller IC provide high current (>1A peak) and high slew rate to quickly charge and discharge MOSFET gates. Special care has been taken in the design of the ML4819 to increase system noise immunity.
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