I am designing a flyback supply following your steps in RDR-201....but i want 6W and 16V in the output with the lnk625 IC. I have followed the PIXIs program for choosing the components. The problem is that i have something similar to Pulse Grouping showed in Figure 11 of datasheet of lnk625, but is enormous, i can see pulse during 100ms and each pulse 20us. The result.......without charge i have 8V instead of 16V with ripple (it is like a sawtooth) and with charge i can see like in Figure 11 of datasheet of lnk625 where is all the time up and down like a hill.
I have changed the values of output capacitor to reduce ripple, i have changed the value of resistor divisor according to the PIXIs program to get 16V, i have put the RC net to reduce pulse grouping like you indicate in the datasheet........but i don't get supply works properly. The trafo works properly.
Any idea that what I can do
Thanks in advanced