Quasi-Constant Frequency Secondary Side Controlled Flyback Concept with Variable ON-Time

Alexander Connaughton, Kennith Leong, Gerald Deboy, Arash P. Talei, Giuseppe Bernacchia

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


This paper introduces the novel Variable ON-time Secondary Side Controlled Flyback concept. The Flyback is controlled from the secondary side with communication to the primary side switch occurring through the coupled inductor itself, eliminating the need for any isolated signal coupling. Independently, simple primary side logic continuously adapts the primary ON-time to sustain constant switching frequency and automatically match energy transfer to the output load. Measurements of the proposed concept show near constant frequency with minimal output ripple during load changes and natural output current limiting in overload conditions.
Original languageEnglish
Title of host publicationPCIM Europe 2017; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management; Proceedings of
PublisherVDE Verlag GmbH
ISBN (Print)978-3-8007-4424-4
Publication statusPublished - 16 May 2017


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