250 W flyback SMPS design for a big size CTV

This paper presents the design criteria, procedure and implementation of an AC-DC Flyback Switch Mode Power Supply (SMPS) which provides 250W rated average power to a big size Colour Television (CTV) Set with a DVD player. A novel technique is developed to keep the Stand-By power consumption of Flyback SMPS under 1W and a boost type of Active Power Factor Correction (Active PFC) preconverter is incorporated into the Flyback SMPS in order to comply with the European CENELEC EN61000-2-3 Electromagnetic Compatibility (EMC) standard[4] which deals with the input current harmonic values of equipments. Index Terms — Active PFC, EMC Standard, Flyback SMPS, Stand-By Power.