John in CR
100 TW
I have a wide range of controllers, 6-9-12-15-18fet, and soon a big 24fet controller. I understand that each phase has it's own bank of fets, but I'm unclear what the different fets do in each phase. The little 6 fet controller seems to have 1 for input and one for output, and the even numbered controllers all have the same kind of balance. The odd number of fet controllers appear to have the extra fet as extra output for each phase. Since the phase current going out can be so much higher, that's where sharing the load between more fets would seem to be more beneficial. This begs the question, is a 12 fet controller really any better than a 9 fet, is an 18 fet controller really any better than a 15 fet, etc?
John
John