Hi Alex,
The degign of the isolated power is quite complex. We generally use the MathCAD as design tool. What are the key specifications, such as the power rating, input voltage range, output voltage range, preferred topology etc?
You can also visit a link to a reference design for the ADP1051 as a power module.
http://www.analog.com/zh/content/reference_design_adp1051/fca.html?query=rdadp1051_rdportal