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UCC256402: Feedback circuit modification for constant current after reaching its maximum current.

Part Number: UCC256402


I designed a LLC resonant controller using UCC256402A and it worked perfectly. It can produce 14V, 40A peak current and 35A continuous current.
I need to modify it to work as described below.

  • CV feedback for lower loads.
  • When load increases more than rated(say 35A), it should reduce the output voltage and current should be at its maximum (35A).

What is the easiest way to achieve this? I used type 2 compensator for my feedback and attached it here.