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Regulator Module

March 23rd, 2008

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Wiring variable switching regulators in parallel?

These are the two regulators i'm interested in:
http://www.ebay.com/itm/LM2596-DC-DC-Adjustable-Step-Down-Switching-Power-Supply-4-5-35V-3-33-5V-/320819060073?pt=LH_DefaultDomain_0&hash=item4ab24e5d69

http://www.ebay.com/itm/Buck-switching-regulator-module-90W-2-5-12-6V-variable-/170748532867?pt=LH_DefaultDomain_0&hash=item27c167d883

I want to get them and wire them in parralel to give me higher current variable powersupply. Would that be possible? I want atleast 10 amps.

I'm assuming they are regulated by an external pot you add. Could I wire the outputs in parralel and the conrol pins for the pot n parralel and controll both with one potentiometer.?
I should have been more clear, I meant two of the first, or two of the second.

There are many problems with what you are proposing: The higher of the two outputs will grab most the power. This becomes a problem for the smaller DC/DC converter because it will run 100% then fold back, the other will take over, it will recover, then fold back. I don't think that will work. Next, If you want to share two power supplies passively, it is done with oring diodes. I would recommend active current sharing from two identical DC/DC converters. I will post some links for you to review.

Good Luck - Garth

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