STMicroelectronics 400 W FOT-controlled PFC pre-regulator with the L6563S EVL6563S-400W EVL6563S-400W Fiche De Données
Codes de produits
EVL6563S-400W
November 2010
Doc ID 15796 Rev 2
1/38
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
continuous conduction mode operation, which is normally achieved with more expensive
control chips and more complex control architectures.
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
continuous conduction mode operation, which is normally achieved with more expensive
control chips and more complex control architectures.
Figure 1.
L6563S 400 W FOT PFC demonstration board (p/n EVL6563S-400W)