The LLC-type series resonant converter-variable switching frequency control

A novel converter is derived by adding an inductor in parallel with the resonant capacitor of the conventional series resonant converter (SRC). It is shown that the control characteristics of the new converter are much improved over those of the conventional SRC. Another advantage of the new converter over the conventional SRC is that it has less component stresses. Based on the characteristic curves derived from the analysis, a systematic design procedure for the new converter is devised. Experimental results are presented.<<ETX>>