Re: Switching Regulator for Audio Amplifier

On Sep 20, 5:18 pm, Jan Panteltje <pNaonStpealm...@xxxxxxxxx> wrote:
On a sunny day (Sat, 20 Sep 2008 13:20:20 -0700 (PDT)) it happened Fred
<frederick.br...@xxxxxxxxx> wrote in
<850f736c-6807-4664-9507-a64c3aeca...@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>:

I donno about forced air cooling, the heat sink would still have to be
big and the air flow would have to be substancial, I have a half
dozen of these heat sinks, and they would require 1000ft/min to get to
0.3C/W.

Those processor coolers, that you can buy in any computer shop,
cool a 90W thermal design power Pentium XX to safe temperature.

I'm still thinking liquid cooled heat sink. Especially if I use the
LM4780, that make 165W to deal with. thats about 30W/cm^2

That chip is specified at max 125 W in any case, less if your heat sink
environment dictates that (Note 3 page 4 of the data ***).

I would not drive it to that extreme.

Get one of those big processor coolers perhaps.

The came up with some thing new since I worked on PCs, heatpipes!

That might work if I can figure out how to mount it.

Fred
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