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Topic: Suitable heatsink for high-power LEDs (Read 2 times) previous topic - next topic

zenwebb

Interesting. I've dug up some more info that could help narrow down the heatsink options:

Maximum power to dissipate: 3W
Maximum temperature: 80 degrees C

Seems to me that the heatsink may not need to be too substantial - 80 C is quite warm!

Does a single piece of 3x3x~1/16" aluminum sound like a good idea now, or should I go bigger?

Again, to increase natural air flow, perhaps I should mount a couple of stand-offs to this thing, to allow for air to travel below the heatsink as well...but if that doesn't help, it saves me the labor.
Grad student, creative technologist, OSHW engineer
http://jason-webb.info

johnwasser

Episode 105 of the EEVBlog podcast shows the calculations needed to properly size a heatsink.  It's just over 30 minutes of video.

http://www.eevblog.com/2010/08/15/eevblog-105-electronics-thermal-heatsink-design-tutorial/
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