| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 106 === Synchronous Conduction Mode (SCM) buck converter offer Zero-Voltage-Switching (ZVS) but suffer from large output inductor RMS current at light load, which are lowering down the efficiency. Triangular Current Mode (TCM) also offer ZVS and improve the light load efficiency but suffer from large switching frequency variations, which are complicating the EMI filter design and the digital control. As a solution, a Clamp-Switch TCM buck converter can be proposed into this paper, by adding clamp switch to limit the switching frequency variation and analyzing switching time interval to calculate the switch-on time, feasibility can be verified by circuit simulation software. With digital control, a 240 watt rated power, 12 volt output of CL-TCM buck converter prototype can be realized.
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