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Old 27th May 2011, 04:02 PM   #1
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Default gainclone heat sink requirements?

I've got 1x ~4" x 6" (by 2inch thick) heat sink left over from my F5 build.

I've got the gainclone chips (lm3886 I think), just wondering what the heat sink requirements are for a build?
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Old 27th May 2011, 06:24 PM   #2
AndrewT is offline AndrewT  Scotland
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look up the datasheet.
Then double the minimum size that National indicates from the graphs/tables.
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Old 1st June 2011, 02:40 PM   #3
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Default CPU Heatsinks

Quote:
Originally Posted by merlin2069er View Post
I've got 1x ~4" x 6" (by 2inch thick) heat sink left over from my F5 build.

I've got the gainclone chips (lm3886 I think), just wondering what the heat sink requirements are for a build?
I used a couple of AMD CPU AM2 Heatsinks with no fans.
They are made of Thermoalloy and are very massive.
You can drill and tap them very easily.
The operating temp with these Heatsinks is arround 55°C after an hour at medium listening volume.
Just be sure that the Temperature between the LM3886 and the heatsink is not more than 3-5 °C. If not, check if the layer of silicon heatsink compound is not too thick and that the LM is well tightened.
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Old 1st June 2011, 02:53 PM   #4
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If I could split it into 2- 2" x 6" heat sinks, I'd be able to use it for the sides of a case.
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Old 3rd June 2011, 01:04 PM   #5
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Default LM3886 Heatsink

I found this on eBay.
May be what you are looking for.

Aluminum HEAT SINK FOR LM3886/TDA7293 Amplifier Board - eBay (item 220697781907 end time Jun-14-11 03:01:18 PDT)

RGDS
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