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Old 10th June 2007, 08:13 PM   #11
Arx is offline Arx  Canada
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Join Date: Aug 2003
Location: North Vancouver, B.C.
Quote:
Originally posted by BWRX
How much you put close to the chip depends on a few things - what frequencies will the chip amplify, how much output power do you expect the chip to produce on a continual basis, and of course size/layout contraints. To maximize space you can use 470uF 50V caps that are about as tall as the chips, otherwise I would side with Minion and try to use up to 1000uF 50V per rail. Of course, place any smaller film/ceramic decoupling caps as close to the chip pins as possible.

If you're looking for ruggedness you really should use a PCB.
Size isn't really a problem. I'm more concerned with heat and inertia. Obviously with the chip right beside the heatsink, the capacitors aren't going to be much further away.

Maybe I'll give the PC board a thought, though my heatsink is about 30cm square.

To distribute the 6 chips across the heastink I'll likely want the chips mounted at the edges of the board, on the same plane, so I'll have to bend a lot of pins...

-Nick
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