SEPIC DC-DC Converter With Multilevel Flying Capacitor Switching Cell

Multilevel power converters have been aim of research in the last years due to their advantages when compared to traditional two-level topologies: better harmonic performance, filters reduction, lower components voltage stress and higher power process capability. Following this trend, the present work proposes two SEPIC DC-DC converters composed of multilevel flying capacitor asymmetric totem-pole switching cell. These structures are achieved by replacing one leg of switch/diode of the traditional two-level asymmetric totem-pole cell by a similar multilevel flying capacitor cell. An operation analysis of the proposed converter is presented, as well as hardware-in-the-loop real-time simulation results to validate the theoretical approach.