iw1700 design

I'm considering using your iW1700 for a PSR flyback converter with the below mentioned specs. Do you have any tools or application notes describing the design and necessary calculations?

I have a lot of electronic experience but unfortunately not in this kind of circuit.

Can you confirm if this is a good choice and that the expected remaining life time is 10+ years?

PS. might be that this post has been send once but I got an error message doing it so I'm just trying again.