On the Proto C the traces were both top and bottom. But with the production version, it's an SMT part and I don't think I can make the traces much larger. You can always solder some copper wire straight to the VN920 leads if you want more current carrying capacity.
Scott k7ybz wrote: > > > Scott, > > I thought those traces were wider. I ran the values through the PCB > calculator and it came out to 6.4 A for a 20 degree C rise at 25 degree > C room temp. A more reasonable 15 degree C rise gave 5.6A for the 100 > mil trace width. > > For 10A the trace width would need to be 230 mils and 20A would be 580 > mils asuming a 15 degree C rise. > > Larry > K7YBZ > > > The VN920 is rated at 30 amps. The traces are 100 mils wide, 1 oz > > copper, and maybe 1/2 inch long. It's mostly a matter of how much > > temperature rise you can tolerate in the traces, so it's going to depend > > on the duty cycle. > > > > Scott > >
