Effects of resistances and leakage inductances on cross regulation in SRC

The authors analyze the effect of parasitic resistances on the cross regulation performance of multi-output series resonant converter (SRC) topologies. The steady state cross regulation characteristics are derived for the example of a two-output SRC. A comparison is given of the characteristic curves of the SRC with parasitic resistances and the SRC with leakage inductances. The results show that the cross regulation due to parasitic resistances is much less than that due to the leakage inductances. The theoretical results for the parasitic resistance case were verified by computer simulation