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ML4822 - ZVS Average Current PFC Controller

Description

The ML4822 is a PFC controller designed specifically for high power applications.

The controller contains all of the functions necessary to implement an average current boost PFC converter, along with a Zero Voltage Switch (ZVS) controller to reduce diode recovery and MOSFET turn-on losses.

Features

  • include undervoltage lockout, overvoltage protection, peak current limiting, and input voltage brownout protection. The ZVS control section drives an external ZVS MOSFET which, combined with a diode and inductor, soft switches the boost regulator. This technique reduces diode reverse recovery and MOSFET switching losses to reduce EMI and maximize efficiency.

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Datasheet preview – ML4822

Datasheet Details

Part number ML4822
Manufacturer Micro Linear
File Size 201.71 KB
Description ZVS Average Current PFC Controller
Datasheet download datasheet ML4822 Datasheet
Additional preview pages of the ML4822 datasheet.

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Full PDF Text Transcription

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May 1997 ML4822* ZVS Average Current PFC Controller GENERAL DESCRIPTION The ML4822 is a PFC controller designed specifically for high power applications. The controller contains all of the functions necessary to implement an average current boost PFC converter, along with a Zero Voltage Switch (ZVS) controller to reduce diode recovery and MOSFET turn-on losses. The average current boost PFC circuit provides high power factor (>98%) and low Total Harmonic Distortion (THD). Built-in safety features include undervoltage lockout, overvoltage protection, peak current limiting, and input voltage brownout protection. The ZVS control section drives an external ZVS MOSFET which, combined with a diode and inductor, soft switches the boost regulator.
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