The parallel capacitance issue of the full-bridge LLC resonant converter model

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I would like to know,in the NanoStep component library,for the Full-Bridge LLC Converter,how to add an additional capacitor in parallel.The main reason is to achieve zero-voltage turn-on(ZVS) in the Full-Bridge LLC Converter topology.

a837ef7e98d932f4374a73134d8abf46
a837ef7e98d932f4374a73134d8abf461439×447 108 KB

LLC
LLC1428×409 60.9 KB