150W Topswitch flyback from 385VDC input (24V, 5A)
We wish to do a TOPswitch flyback for 150W from 385VDC PFC output.
Why does much literature say this is unadviseable? (not PI literature)
Efficiency doesnt matter, this PSU will rarely get above 10W load most of the time......mind you, on rare occasions it may need to do 150W for 1 hour and not fail due to overheating.
Can we use a HiperPFS PFC stage?...the one with fet and diode incorporated?
If so, can we disable the HiperPFS as most of the time we will be on light load.
Also, what is VAC input goes up to 300VAC.....how does HiperPFS/Topswitch solution look then?