752Views5Replies

Author Options:

It possible to connect multiple AXT PSU's in parallel or series to increase the current and/or voltage? Answered

It possible to connect multiple AXT PSU's in parallel or series to increase the current and/or voltage? I'm not too sure what else to say... Thanks a bunch,Mike :)?

11 Replies

user
muttyfutty (author)2009-09-28

Hang on!!! I looked on the other thread and it says that if you do you will creat a "short" across the COM and 12V is there anyway to rectify that? can you remove the earth connection so then it wont short? Am I talking Rubbish? Thanks Mike

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)2009-09-27

It is, on ATX supplies, the green wire.

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)2009-09-27

The old school ones did - for pro kit - like mainframes !

Select as Best AnswerUndo Best Answer

user
Re-design (author)2009-09-27

Well the only reason I posted it was to create more dialog on it and I didn't have any answer I was willing to put my name on. I don't like hooking power supplies together at all. I'd rather just build new or adapt one that I've already got. My ceiling is already stained with enough of the magic smoke.

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)Re-design2009-09-27

Ah, what a shame we can't recycle it....

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)2009-09-27

You can do it if you put a resistor in as well, but that sacifices load regulation, unless you have external sensing.;...

Select as Best AnswerUndo Best Answer

user
Re-design (author)2009-09-27

No problem, I understood your intent.

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)2009-09-27

I'm not sure. It won't be a lethal mistake, but I'd put a caveat in if I were you. Steve

Select as Best AnswerUndo Best Answer

user
Re-design (author)2009-09-27

This question came up a few days ago. Here's a link to those answers.
Link

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)Re-design2009-09-27

Sean too was being fairly cagey about doing this. Real, SMPSUs with external sense inputs, you might be able to parallel, but series connecting, avoid.

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)2009-09-27

Probably not, because small errors in voltage will cause large circulating currents if they are in parallel, and their traces are too small to support more than their rated current if they are connected in series.

Select as Best AnswerUndo Best Answer