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UCC2891: Power supply design TINA SIMULATION

Part Number: UCC2891

Specifications are given in excel calculation sheet

I made this simulation but I am not getting the correct output. I have attached the calculations(made by me) and tina simulation with this. I am getting convergence problem as I increase load from no load.calculations forward converter.xlsxforward converter design.tsc

Early response is highly appreciated.

Thanks 

Siddharth

AAA Intern