An integrated Boost-Sepic-Ćuk DC-DC converter with high voltage ratio and reduced input current ripple

Abstract

This paper proposes a new non-isolated DC-DC converter for photovoltaic application. This converter topology is based on dual stage integration. In first stage conventional boost topology is integrated with Self-Lift Sepic converter. This topology is then integrated with Ćuk converter. The first stage provides a high static voltage gain and reduced voltage stress across the single switch facilitating the use low rating switch resulting in low conduction losses. The second stage further aids the high static voltage gain. There is reduced voltage stress across the diodes too, encouraging the use of Schottky diodes for eliminating the problem of reverse recovery time resulting in further reduction of conduction losses. This paper presents design consideration of new topology and stated characteristics are verified by simulation.