[SI-LIST] Re: Fw: PCB Copper Heatsink

Steve, there are several places where you can find heatsink curves.  The 
thermal resistance depends on several factors, including the temperature 
difference that you can tolerate.  A starting point for convection cooling 
is one square inch = 70C/watt.

Regards,


Steve.
At 02:06 PM 6/16/2004 +0100, GullWing UK wrote:
>Subject: Re: PCB Copper Heatsink
>
>
> > Dear SI'ers,
> >                      I intend using a new DDR I/II power device.  The
>device
> > needs to dissapate 38.7degC / W to keep below the maximum junction
> > temperature.  Does anybody have tables/equations to calculate the required
> > copper necessary on the PCB to dissapate this heat.
> >
> > Regards
> > Steve
> > Gullwing Ltd
> >
>
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