Z
zenerbjt
Guest
Hi,
Do you agree, Isolated offline SMPS of say 240W for eg Vout = 12V and iout = 20A , that switch off a PFC output should not bother using synchronous rectifiers, but instead just give a vout of say 60V and 4A…..then they don’t need synchronous rectifiers because output current is so low….and then the 12V , 20A (or whatever) can be cheaply provided by using eg a LM5116 sync buck controller?
Very few Two transistor forward or LLC controllers comprise sync rect drivers. Eg HiperTFS and HiperLCS don’t have sync rect drivers. Also, those sync rect controllers which sit on the secondary side and don’t communicate with the primary side controller are very dodgy under certain cirmustances, and should be avoided.
So do you agree that unless super small size is needed, then having a higher voltage output non-sync-rect, isolation-stage SMPS, followed by some cheap offtheshelf sync Buck controllers is the best way to supply your high current outputs?
Do you agree, Isolated offline SMPS of say 240W for eg Vout = 12V and iout = 20A , that switch off a PFC output should not bother using synchronous rectifiers, but instead just give a vout of say 60V and 4A…..then they don’t need synchronous rectifiers because output current is so low….and then the 12V , 20A (or whatever) can be cheaply provided by using eg a LM5116 sync buck controller?
Very few Two transistor forward or LLC controllers comprise sync rect drivers. Eg HiperTFS and HiperLCS don’t have sync rect drivers. Also, those sync rect controllers which sit on the secondary side and don’t communicate with the primary side controller are very dodgy under certain cirmustances, and should be avoided.
So do you agree that unless super small size is needed, then having a higher voltage output non-sync-rect, isolation-stage SMPS, followed by some cheap offtheshelf sync Buck controllers is the best way to supply your high current outputs?