Hi, I need to design a flyback SMPS with the following requirement:
Input voltage range: 290 - 800 VDC
Isolate Output: 24V 
Output power : 50W. 
 
I was trying  to use  your excellent PI Expert Online but when I introduce my inputs requirements, a pop-ups a warning windows saying that the limits its 425 V...
Do you have any solutions, reference desing or anything that could help me?
Thank you in advance for any information.