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I would like to simulate the ZVS Synchronous rectification buck converter, I know if I operate in ZVS I need to change the switching frequency of the buck converter, and I have some questions I want to ask you guys.

Here are my questions:

  1. How to model the variable frequency of buck converter, I think the small-signal model is not the same as the constant frequency buck converter.

  2. How to implement the variable frequency control in PSIM or SIMPLIS, I would like to know how to build the control stage, I only can design the control stage in constant frequency.

  3. Do you guys have some material can suggest to me to read?

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