Re: Thermal pads on PCBs
- From: Jasen Betts <jasen-b@xxxxxxxxxxxxxxxxxx>
- Date: Wed, 5 Oct 2005 21:31:03 +1300
On 2005-10-03, dave madden <postmaster@xxxxxxxxxxxxxxxxxxxxx> wrote:
> sink. My PCB design software leaves an annulus around each pad in a
> ground plane, connecting the pad to the plane with a "+" trace. The
> manual says that's a "thermal" connection, and that if you put copper
> all the way around, the thermal conductivity away from the pin is so
> high that you can't solder it.
>
> How hard is it, really, to solder something like that? If I'm trying
> to take heat away from the chips, then a full connection sounds like
> what I want. But if I can't solder it, I'll be an unhappy camper.
with a big enough soldering iron anything can be soldered.
I'd expect you to want 50W or more (100W?) for that sort of application..
if you only want to do it once get a cheap soldering iron from an auto
parts or hardware retailer.
If you plan to do many invest in a soldering gun which will give better
control over the heat output.
Bye.
Jasen
.
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