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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.

Key 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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📁 Similar Datasheet

Part Number Description Manufacturer
ML4819 Power Factor and PWM Controller Combo Micro Linear
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Other Datasheets by Fairchild (now onsemi)

Part Number Description
ML4812 Power Factor Controller
ML4818 Phase Modulation/Soft Switching Controller
ML4800 Power Factor Correction and PWM Controller Combo
ML4801 Variable Feedforward PFC/PWM Controller Combo
ML4802 PFC/PWM Controller Combo with Green Mode

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.