A high frequency, low volume, point-of-load power supply for distributed power systems

A resonant version of the dc-dc forward converter is presented in this paper. It is a topology capable of operation in the 10 MHz range, and it can be used for very low volume, point-of-load conversion in distributed power systems. In comparison to other resonant topologies, this converter takes advantage of a very low transformer leakage inductance to achieve zero-voltage switching of all its power semiconductor devices. Its resonant ring is also independent of load current. A 50 watt prototype operating at 3.6 MHz and a discussion of the component work necessary to reach 10 MHz are presented.