Hi dear friend

I hope this link can help you

https://www.google.nl/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwip3vvJo4PPAhVBbBoKHWqIC8sQFgghMAA&url=http%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fapplication_note%2Fcd00003894.pdf&usg=AFQjCNEJyVL__rTPr5K7J-lREr7NKBCHSg&bvm=bv.132479545,bs.2,d.d2s

Hi dear friend

I hope this link can help you

https://www.google.nl/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwip3vvJo4PPAhVBbBoKHWqIC8sQFgghMAA&url=http%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fapplication_note%2Fcd00003894.pdf&usg=AFQjCNEJyVL__rTPr5K7J-lREr7NKBCHSg&bvm=bv.132479545,bs.2,d.d2s

Hi

this is good for your question

http://www.st.com/resource/en/application

The power dissipation p in the diode can be easily calculated when on knows the current I passing i it and the voltage V across it between the anode and cathode.

Simply you can use the expressiveness:

p= IV this s for the dc static power,

For dynamic power, p= Integral v i dt / T Where T is the integration is made on a time T.

Best wishes