A modified non-dissipative LC snubber circuit for MOSFET based fly-back converters
by Debashis Chatterjee, A.K. Ganguli, R. Chakrabarti, S.S. Bharatkar
International Journal of Power Electronics (IJPELEC), Vol. 2, No. 1, 2010

Abstract: High frequency converters with different switching topologies are now being widely used over a wide range of applications, which mainly includes different types of power supplies. Snubber circuit design for high frequency-switched converters using MOSFET as a power device assumes different dimension as regards the minimisation of the power dissipation in the snubber resistance. This paper shows a different mode of operation to reduce the clamp voltage across the device used in fly-back type converter. The LC snubber circuit is almost lossless and of energy regenerative type. A reduced clamp voltage is required not only for device protection, but also to reduce the cross regulation effect in multiple output converters. Simulations and experimental results validate the concept.

Online publication date: Mon, 30-Nov-2009

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