Cooking Recitfier

Jun 14, 2007 4 Replies
P

Hi i was looking for a bit of advice! I have built a dual +/-15v power supply running from a 18v 225VA torodal on 2 separate windings, I am pulling



4.5A on the positive side and approx 0.5A on the negative side, the positive rectifier is cooking i tried replacing this with an 8A one and it still does it has anybody else come a crossed this and know what the problem is, i have checked that the windings are in phase and wired correctly i can post a full schematic on request.

Thanks Paul


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R

Tell your cooking rectifier that i like my hot dogs well done.

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J

Yeah, you're overloading it?, or you need a heat sink for it. Also, beware when selecting rectifiers, it may be in your best interest to select one with a voltage rating just above what you'll be inputting to it.

"I\'m never wrong, once i thought i was, but was mistaken" Real Programmers Do things like this. http://webpages.charter.net/jamie_5
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C

it will dissipate about the same amount of heat, that heat needs to go somewhere too hot to touch doesnt mean its too hot, if it realy burns you the instant you touch it that probably means it is too hot.

ive tried using synchronous mosfet rectification and it can be quite effective at reducing dissipation, but its perhaps a tad overcomplicated unless you realy need it.

Colin =^.^=

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