Sharing current through diodes

rtarbell · 3rd April 2007, 02:02 PM

Normally, one can not parallel diodes to share power because one diode will turn on before the others, and this diode will then hog the current from the others.

==> What about using MOS diodes (taking a power FET and tying its drain to gate) in parallel? Will they share the current more equally?

jcx · 3rd April 2007, 03:49 PM

series R works, costs a little extra V drop

for ps rectifiers you could use multi-filar sec winding so R and V match between wires and parallel the outputs of the diodes on each of the sec wires

3rd April 2007, 02:02 PM	#1
rtarbell diyAudio Member Join Date: Sep 2005	Sharing current through diodes Normally, one can not parallel diodes to share power because one diode will turn on before the others, and this diode will then hog the current from the others. ==> What about using MOS diodes (taking a power FET and tying its drain to gate) in parallel? Will they share the current more equally?

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3rd April 2007, 03:49 PM	#2
jcx diyAudio Member Join Date: Feb 2003 Location: ..	series R works, costs a little extra V drop for ps rectifiers you could use multi-filar sec winding so R and V match between wires and parallel the outputs of the diodes on each of the sec wires

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