Useful information on copper and temperature calculations can be found at http://www.aracnet.com/cgi-usr/gpatrick/
Trace Width Calculator at http://www.aracnet.com/cgi-usr/gpatrick/trace.pl and references and formula at http://www.aracnet.com/~gpatrick/trace_ref.html I think there are some misplaced decimal points in the table. More realistic values are: 7 AMP 45C (113F) .145 10 AMP 45C (113F) .225 > > Minimum Conductor Widths For PCBs > > Temperature Rise Above Ambient > > For 1/2 oz Copper > > Amperage Ambient Temperature Conductor Width > > 1 AMP 45C (113F) .013 > > 1.5 AMP 45C (113F) .025 > > 2 AMP 45C (113F) .033 > > 3 AMP 45C (113F) .050 > > 4 AMP 45C (113F) .073 > > 5 AMP 45C (113F) .110 > > 6 AMP 45C (113F) .125 > > 7 AMP 45C (113F) 1.45 > > 10 AMP 45C (113F) 2.25 > >Hmmm, seems AWFULLY nonlinear! 13 mils is good for >one amp, but you need 173 times more for 10 A? I find that >hard to believe, unless this was done at RF frequencies where >edge effects dominate. I've been building servo amps and >such gear running 10 A on roughly 250 mil traces (1 Oz Cu), >but that is low frequency. > >Jon * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
