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Old 18th January 2005, 09:55 PM   #1
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Default Heat dissipation from 3875

Has anybody else noticed that after a while the heat dissipation out of an LM3875 amp reduces a lot? I've been noticing that with my amp. at first, I was worried my heatsink wasn't big enough, but now it's running cool enough to not matter.

If anybody has noticed this, does anyone have any idea why it happens?
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Old 18th January 2005, 10:13 PM   #2
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Perhaps whatever thermal interface material you used has some sort of "burn-in" period. I kind of doubt it's the chip.
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Old 19th January 2005, 12:36 AM   #3
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possibly, but even the heatsink is cooler.
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Old 19th January 2005, 01:03 AM   #4
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it does seem to "seat" itself thermally --
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