Need a 80V-12V/1.5A power supply circuit with less thermal loss

[Mithun_K_Das]

I need a power supply circuit diagram for the data as follows:
In: 40-80VDC(Unregulated)
out: 12V(regulated)
Current: 1.5A
Temp: less than 65 * C

 

[embedsys]

one chip solution AP1512-12K5L-13. i/p voltage limiting to 60VDC

---------- Post added at 17:57 ---------- Previous post was at 17:49 ----------

Modules:
VYB20W-Q48-S12-T,
PTK25-D48-S12-T
from CUI Inc