새로운 SEPIC-Flyback 컨버터의 동작특성

A new SEPIC-Flyback converter is proposed. The proposed converter is the superposition of SEPIC and Flyback converter. Not only SEPIC output but also Flyback output could be fully regulated by constant frequency PWM control. Merged SEPIC and Flyback topology could share the transformer and power MOSFET. When the switch turns of one topology operates via capacitive energy transfer. Another topology acts as powering mode while the switch is off. So, it ould increase power density per one cycle. The operating principle of the proposed converter is described below. Prototype featuring 24V input, 48V output, 100kHz switching frequency, and 100W output is simulated under the proposed topology.