The advancement in SEPIC dc-dc converter can be done with the use of snubber circuit. A new approach for this improvement of SEPIC converter is used for high power factor rectifiers. Ac-dc conversion of electric power is widely used in different applications like as in adjustable-speed drives, switch-mode power supplies, uninterrupted power supplies, and utility interface with nonconventional energy sources such as solar Photovoltaic etc., battery energy storage systems, in process technology s ...