AN2994 400瓦光纤收发器控制的PFC预调节器的L6563S

AN2994 400瓦光纤收发器控制的PFC预调节器的L6563S

AN2994
Application note

400 W FOT-controlled PFC pre-regulator with the L6563S

Introduction
This application note describes a demonstration board based on the transition-mode PFC
controller L6563S and presents the results of its bench evaluation. The board implements a
400 W, wide-range mains input, PFC pre-conditioner suitable for ATX PSU, flat screen
displays, etc. The chip is operated with fixed off time control in order to use a low-cost device
like the L6563S, which is usually prohibitive at this power level. Fixed-off-time control allows
cont