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An interleaved soft switching converter with active snubber circuit is presented here. The active snubber circuit not only absorbs the energy stored in the leakage inductor but also achieves zero-voltage switching turn-on feature for power switches. Moreover, the resonant tank which is composed of the leakage inductor and resonant capacitor is used to achieve zero current switching turn-off feature for rectifier diodes at the secondary side of transformer. Hence, the reverse recovery problem can be eliminated. The operational principle and design consideration are discussed in detail. Finally, experimental results taken from a 600W prototype are presented to confirm the effectiveness of the proposed converter.
Date of Publication: July 2011