High-frequency converter for power supply applications

A means of assessing the relative merits of single-ended and push-pull switching converter or inverter stages is presented. The dependency of those merits upon the range of input voltage and output current is set forth. For a single-ended high-frequency converter stage, the relationships among output power, switch current and voltage ratings, input voltage range, and reset voltage reveal the criticality of transformer design. Transformer stored energy considerations for optimum output power dictate absolute control of leakage reactance as well as the shape of the magnetization curve.