IMPROVED GEOMETRY OF INTEGRATED MAGNETICS FOR THE HYBRIDGE TOPOLOGY

摘要

A new geometry of integrated magnetics [1] for the Hybridge topology [2] is presented. The geometry is designed for the low voltage and high current required by modern digital applications. The new integrated magnetics makes it possible to build high-efficiency low-cost DC/DC converters, because it features low stray inductance and eliminates the need for coil formers, ground air gaps and interleaving of the primary and secondary windings. Experimental results obtained for a 50V to 3.3V 25A DC/DC converter with galvanic isolation, demonstrates efficiency above 91% for half to full load current.