EVL6563S-100W STMicroelectronics

AN3065 Application note 100 W transition-mode 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 demonstration. The board implements a 100 W, wide-range mains input, PFC pre-conditioner suitable for ballast, adapters, flatscreen displays, and all SMPS having to meet the IEC61000-3-2 or the JEITA- MITI regulation. The L6563S is a current-mode PFC controller operating in transition mode (TM) and implementing an internal high-voltage startup circuitry. Figure 1. EVL6563S-100W: L6563S 100W TM PFC demonstration board September 2010 Doc ID 16279 Rev 2 1/33 www.st.comContents AN3065 Contents 1 Main characteristics and circuit description . 4 2 Electrical diagram . 6 3 Bill of material 7 4 Test results and significant waveforms 10 4.1 Harmonic content measurement . 10 4.2 Inductor current in TM and L6563S THD optimizer . 12 4.3 Voltage feed-forward and brownout function 15 4.4 Startup operation . 20 4.5 PFC OK pin and feedback failure (open loop) protection 20 4.6 TBO (tracking boost option) . 22 4.7 Power management and housekeeping functions 23 5 Layout hints . 25 6 EMI filtering and conducted EMI pre-compliance measurements . 27 7 PFC coil specifications 29 7.1 General description and characteristics 29 7.2 Electrical characteristics 29 7.3 Electrical diagram . 29 7.4 Winding characteristics 30 7.5 Mechanical aspect and pin numbering . 30 7.6 Unit identification . 30 8 References 31 9 Revision history . 32 2/33 Doc ID 16279 Rev 2