White Paper: PFC Single Conversion Line Ripple Cancellation Using the Yeaman Topology

October 6, 2014
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PCIM White PaperThe Yeaman topology takes advantage of the isolation in a series of DC-DC converters to put the outputs in a series stack. One converter is typically a high efficiency fixed ratio bus converter with no feedback, while the other is a lower efficiency regulating stage that is capable of regulating the output over the entire range of operation that is powered by both stages. The result is that most of the power is provided by the less costly, more efficient converter, while the regulation is handled by a converter that handles a small fraction of the output load, resulting in cost and efficiency benefits over a single up scaled regulated stage.

Presented at PCIM 2014 by Harry Vig, principal applications engineer, this paper introduces a new application of the Yeaman Topology. When used with single conversion PFC AC to DC converters, the topology allows efficient regulation of the line ripple on the output bus by over two orders of magnitude without the need to reprocess 100% of the energy coming from the previous conversion stage. The result is in an increase of power density, efficiency, and lower cost than a traditional post processing stage.

To learn more about this approach, register below for the white paper.

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