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The Benefits of Planar Magnetics in OF Power Conversion Planar Magnetics ( PM ) : The Technology that Meets the Challenges of HF Switch and Resonant Mode Power Conversion

The ever lasting quest for high power density solutions to power conversion systems, has recently yielded intriguing new engineering ideas and conversion topologies. Most if not all of these, hinge on the theoretical prediction that the size of magnetic components and capacitors should decrease as the conversion frequency is increased. Unfortunately, as many designers have learned the hard way, an increase in switching frequency, by itself, will not necessarily lead to higher power density if the conversion efficiency is to be maintained or improved. The benefits of high frequency conversion can be materialized, without compromising losses, only if a multitude of objectives are met. Among theses: