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UCC28630: UCC28630 Fsw selection and simulation model

Part Number: UCC28630
Other Parts Discussed in Thread: UCC28634, UCC28631

Hi Team,

My customer is considering using UCC28630 to design Dual switch flyback, input 326Vdc~848Vdc, 3 outputs(total100W max): 12V/83W , -12V/3.6W, 5V/2.5W, expect efficiency is 85%~90%.  

1.About the inductance calculation, how to choose fsw value of Equatin 25 in datasheet 9.2.4? Should it always be 65kHz or it can be larger like 70kHz~100kHz? Cause larger Fsw helps reduce transformer size.

2. Is there a UCC28630 PSIM simulation model to help simulate the device's work with customer external component value? This will helps a lot with customer design.

Thanks and best regards