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Heat-sink size 101
Heat-sink size 101
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Old 27th October 2012, 11:03 PM   #1
thor61 is offline thor61
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Default Heat-sink size 101

Does anyone know of a simple way or formula for selecting the proper size heat-sinks ?
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Old 27th October 2012, 11:15 PM   #2
sreten is offline sreten  United Kingdom
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Its not simple at all when your talking big heatsinks. The rest of the time
looking at similar applications you usually need very similar heatsinks.

rgds, sreten.
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Old 27th October 2012, 11:48 PM   #3
Ron E is offline Ron E  United States
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Look in the application notes in the data sheet for the LM3886 chip amp. Given is a relatively simple relation between maximum junction temperature and ambient temperature, and case and heatsink degrees C (or K) per Watt ratings. This is about as simple as it can be made, although the same heatsink will have a different C/W rating at each level of dissipated power.
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Old 27th October 2012, 11:48 PM   #4
TonyTecson is offline TonyTecson  Philippines
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Heat-sink size 101
have look here: How to Select a Suitable Heat Sink and http://www.crydom.com/en/Tech/HS_WP_HS.pdf
planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B
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Old 27th October 2012, 11:55 PM   #5
sofaspud is offline sofaspud  United States
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This Jaycar primer on heatsink basics is both a useful and concise explanation.
It is error only, and not truth, that shrinks from enquiry. - Thomas Paine
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Old 28th October 2012, 12:12 AM   #6
thor61 is offline thor61
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Thank-you everyone ! While doing some further surfing I had found this > http://sound.westhost.com/heatsinks.htm < this seems to be well written in a form easy to understand.

Last edited by thor61; 28th October 2012 at 12:38 AM.
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