Computer-based design of optimal efficiency series-resonant converters above resonance

Power losses in series-resonant converters (SRCs) operated above resonance are examined to develop design guidelines for producing SRCs with high operating efficiencies. Expressions are developed as functions of the design variables for losses in the transistor switches, antiparallel diodes, and the resonant capacitor. Using these independent design variables as arguments, performance functions (such as operating efficiency and component stress) are found. Based on predictions of the performance functions, suggested design strategies are presented for maximizing operating efficiency, minimizing component stress, or satisfying some combination of these two performance functions