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A novel single-stage off-line converter with PFC, fast output voltage regulation and reduced switching frequency range

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3 Author(s)
D. L. O'Sullivan ; PEI Technol., Univ. Coll. Cork, Ireland ; M. G. Egan ; M. J. Willers

A single-stage LC resonant AC/DC converter with fast output voltage regulation and PFC is described. Variable switching frequency control is used to regulate the output voltage. A new control method is introduced whereby the duty cycle is varied to regulate the output voltage at lighter loads. This enables a drastic reduction in the switching frequency range. Experimental results from a 5 V, 20 A prototype are presented

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Power Electronics and Variable Speed Drives, 2000. Eighth International Conference on (IEE Conf. Publ. No. 475)

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