AN2485 Datasheet, PDF (1/29 Pages) STMicroelectronics – 400 W FOT-controlled PFC pre-regulator with the L6563

AN2485
Application note
400 W FOT-controlled PFC pre-regulator with the L6563
Introduction
This application note describes an evaluation board based on the Transition-mode PFC
controller L6563 and presents the results of the bench evaluation. The board implements a
400 W, wide-range mains input, a PFC pre-conditioner suitable for ATX PSU, or a flat
screen display. The chip is operated with Fixed-Off-Time control in order to use a low-cost
device like the L6563 which is usually prohibitive at this power level. Fixed-Off-Time control
allows Continuous Conduction Mode operation which is normally achieved with more
expensive control chips and more complex control architectures.
L6563 400W FOT PFC Demo board (EVAL6563-400W)
March 2007
Rev 1
1/29
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