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ACDC or DC-DC converters are today entirely dominated by switched-mode power converters, SMPCs. The industry today, in the race of meeting customers’ demands, is looking at packaging more and more power in lesser and lesser volumes. Hence the power supply designers are always engaged in devising new topologies and techniques to achieve power densities efficiently. Soft switching is one such technique which aids the designers in finding a solution to increase power densities by raising the switching frequency. The present paper proposes the least complicated soft-switching technique in low power flyback converters. Flyback converter in the power range of 150W is taken as a study piece, and soft switching is demonstrated without adding any extra hardware and control overhead. The obtained results are compared with a hard switched CCM flyback converter. Practical working models are built, tested, and evaluated to display the efficacy of the proposed scheme.

REALIZING SOFT SWITCHING IN FLYBACK CONVERTER BY APPROPRIATE TRANSFORMER DESIGN AND COMPARISON WITH HARD SWITCHED SIMILAR CONVERTER