Quasi-resonant buck converter-possible topologies, similarities and differences

The work deals with the synthesis of possible structures of quasi-resonant buck converters on the basis of their topological definitions. Cases of applying soft switching zero voltage or zero current switches, current or voltage bi-directional were discussed. Next, the results of analysis and computer simulation-current or voltage transients in particular circuits was presented. Identical and differing transients were found. Characteristic properties or current and voltage value for particular circuits were compared, which gives indications for designing them.