[SI-LIST] Re: power plane thickness
- From: Binayak Shrestha <binayaks@xxxxxxxxx>
- To: kgrhoads@xxxxxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Thu, 5 Oct 2017 23:47:42 +0530
Thanks Kevin!
Best Regards,
Binayak
On Thu, Oct 5, 2017 at 3:38 AM, Kevin G. Rhoads <krhoads@xxxxxxxxxxxxxx>
wrote:
On 10/4/2017 7:30 AM, Binayak Shrestha wrote:
[c] Do I need to use 1 oz. thick Cu-planes to carry 20A current or can I
use 1/2 oz. thickness and give wider planes to compensate for the
reduction in thickness?
In principle, yes. In practice, it depends.
Are you familiar with "spreading resistance"? The current can spread,
yes; but it will have to concentrate at the pin(s). Check that in your
simulations. And remember, copper is not only a conductor of current,
but also of heat.
Again, as I noted originally, I remind you that you need consider the
currents on BOTH the power plane and on the ground (return) plane. Have
your simulations cover both.
Sincerely
Kevin
--
Regards.
Binayak Shrestha
Research Engineer,
C-DOT Centre for Development of Telematics
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