A modified non-dissipative LC snubber circuit for MOSFET based fly-back converters. (2nd December 2009)

• Record Type: Journal Article
• Authors: Chatterjee, Debashis; Ganguli, A.K.; Chakrabarti, R.; Bharatkar, S.S.
• Is Part Of: International journal of power electronics. Volume 2:Number 1(2010)
• Page Start: 1
• Page End: 15
• Publication Date: 2009-12-02
• Subjects: non-dissipative snubber -- fly-back converters -- resonant frequency -- LC clamp -- clamp voltage -- simulation -- MOSFET -- high frequency converters -- switching topologies -- snubber circuit design; Power electronics -- Periodicals; 621.31705
• Languages: English
• ISSNs: 1756-638X

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.