heat sink on a PC board

jlarkin · 2021-06-05T17:29:34+00:00

Suppose I have a bunch of PC boards in a chassis, vertical andparallel, about 3" x 12" each, maybe 1.25 inch centers. One or more ofthem might be programmable ac/dc load modules.Some of you guys work with cooling CPUs and such. If I had, say, a 3"x 4" heat sink, and could space one or more small fans above each, howmuch power might I be able to dump? The host rackmount enclosure willhave a couple of overall fans too.The idea is roughly?dl=0We could set up a breadboard test next week, but I'd like a ballparknow.Is, say, 100 to 200 watts feasible? It could be allowed to get prettyhot, hotter than a CPU would like.Maybe we could use several mosfets and a few commercial CPU coolerthings.

Jun 05, 2021 Last reply: 5 years ago 21 Replies

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Ed Lee 5 years ago

I use PC123 or high voltage equivalent (opto isolators) to implement floating gate drivers. It can totally isolate the electronics from the power source. That way, i can monitor and control upto 20v power source.

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Bill Sloman 5 years ago

Inductive isolation is usually cheaper, but bulkier, and usually takes more design time.

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