Re: Using a PCB as a heatsink
- From: MassiveProng <MassiveProng@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 13 Feb 2007 23:22:41 -0800
On Wed, 14 Feb 2007 07:01:11 +0000, Eeyore
<rabbitsfriendsandrelations@xxxxxxxxxxx> Gave us:
Mike Noone wrote:
Hi - I'm going to be making a board that has a large number of high
power (1W) LEDs. I'd ideally like to use the PCB as a heatsink to get
rid of all the heat. How much surface area/watt do I need to allow?
How many ? Use some simple logic and work out how hot your pcb is going to get.
Hint: 10W is a lot in an enclosed space.
Make small PCBs for each LED (1 sq cm ea or less), and mount those
above the driver board like a third of a cm or more with pins or stiff
wires, and the airgap will do a lot of cooling with a bit of flow.
Leave both sides of the tiny boards fully cladded on one or both sides
(of course negate shorts), and leave them bare ie no mask so they
radiate their heat better. Heavy gauge copper or SPC wire (solid)
would allow some heat conduction as well.
.
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