AN1895 Datasheet, PDF (1/16 Pages) STMicroelectronics – EVAL6562-375W Evaluation Board

AN1895
Application note
EVAL6562-375W Evaluation Board
L6562-based 375W FOT-controlled PFC Pre-regulator
Introduction
This application note describes a 375W evaluation board based on the L6562 Transition-
mode Power Factor Correction (PFC) controller (order code: EVAL6562-375W).
The board implements a 375W, wide-range mains input, PFC pre-regulator that is suitable
for a 300/350W ATX12V power supply unit (PSU).
To enable the use of a low-cost device like the L6562 at a power level that is usually
prohibitive for this device, the chip operates with a Fixed-Off-Time (FOT) control system.
This allows Continuous Conduction Mode operation, normally achievable with more
expensive control chips and more complex control architectures.
EVAL6562-375W evaluation board
August 2006
Rev 3
1/16
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