Re: gEDA-user: Problems with a TDSON8 footprint
I think we'd need to see the actual PCB to know if there's a short. My suspicion would be that you have the fet the wrong way around or the pads are not assigned correctly in the footprint or symbol. On 20 March 2011 17:23, Rob Butts [1]r.but...@gmail.com wrote: I am using an Infineon power mosfet in a voltage converter. I'm attaching the datasheet. Pins 5 thru 8 get tied together and the actual footprint has a big pad that ties them together. I'm attaching the footprint that I made also. I'm having trouble with PCB making the big pad orange when I optimize rats. The big pad lays across each pad for each pin. How can I do this? Suggestions? Or, since only the big pad that lays across the pads for each pin turns orange, should I just ignore this? Thanks ___ geda-user mailing list [2]geda-user@moria.seul.org [3]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user References 1. mailto:r.but...@gmail.com 2. mailto:geda-user@moria.seul.org 3. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Problems with a TDSON8 footprint
I'm attaching the symbol and am laying out the board. None of the pins that tie to the big pad are orange, only the big pad and when I click on the board the orange goes away. On Sun, Mar 20, 2011 at 1:40 PM, Thomas Oldbury [1]toldb...@gmail.com wrote: I think we'd need to see the actual PCB to know if there's a short. My suspicion would be that you have the fet the wrong way around or the pads are not assigned correctly in the footprint or symbol. On 20 March 2011 17:23, Rob Butts [1][2]r.but...@gmail.com wrote: I am using an Infineon power mosfet in a voltage converter. I'm attaching the datasheet. Pins 5 thru 8 get tied together and the actual footprint has a big pad that ties them together. I'm attaching the footprint that I made also. I'm having trouble with PCB making the big pad orange when I optimize rats. The big pad lays across each pad for each pin. How can I do this? Suggestions? Or, since only the big pad that lays across the pads for each pin turns orange, should I just ignore this? Thanks ___ geda-user mailing list [2][3]geda-user@moria.seul.org [3][4]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user References 1. mailto:[5]r.but...@gmail.com 2. mailto:[6]geda-user@moria.seul.org 3. [7]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list [8]geda-user@moria.seul.org [9]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user References 1. mailto:toldb...@gmail.com 2. mailto:r.but...@gmail.com 3. mailto:geda-user@moria.seul.org 4. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user 5. mailto:r.but...@gmail.com 6. mailto:geda-user@moria.seul.org 7. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user 8. mailto:geda-user@moria.seul.org 9. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user MSeriesPowerMOSFET8Pin-1.sym Description: application/geda-symbol ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Problems with a TDSON8 footprint
Rob Butts r.but...@gmail.com writes: I am using an Infineon power mosfet in a voltage converter. I'm attaching the datasheet. Pins 5 thru 8 get tied together and the actual footprint has a big pad that ties them together. I'm attaching the footprint that I made also. I'm having trouble with PCB making the big pad orange when I optimize rats. The big pad lays across each pad for each pin. Your symbol has 5 or 8 pins? The one big pad has what pin number? I'd do a footprint/symbol with 8 pins, connect them on the schematic, and draw poly across the connected pins on the layout. I don't know if the poly clearance can be reduced to zero, of if you need to draw thermals to the poly, or a fat line, depending what you need. How can I do this? Suggestions? Or, since only the big pad that lays across the pads for each pin turns orange, should I just ignore this? Thanks ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user -- Stephan Böttcher FAX: +49-431-85660 Extraterrestrische PhysikTel: +49-431-880-2508 I.f.Exp.u.Angew.Physik mailto:boettc...@physik.uni-kiel.de Leibnizstr. 11, 24118 Kiel, Germany ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Problems with a TDSON8 footprint
Ok, I'll try it. On Sun, Mar 20, 2011 at 2:03 PM, Stephan Boettcher [1]boettc...@physik.uni-kiel.de wrote: Rob Butts [2]r.but...@gmail.com writes: I am using an Infineon power mosfet in a voltage converter. I'm attaching the datasheet. Pins 5 thru 8 get tied together and the actual footprint has a big pad that ties them together. I'm attaching the footprint that I made also. I'm having trouble with PCB making the big pad orange when I optimize rats. The big pad lays across each pad for each pin. Your symbol has 5 or 8 pins? The one big pad has what pin number? I'd do a footprint/symbol with 8 pins, connect them on the schematic, and draw poly across the connected pins on the layout. I don't know if the poly clearance can be reduced to zero, of if you need to draw thermals to the poly, or a fat line, depending what you need. How can I do this? Suggestions? Or, since only the big pad that lays across the pads for each pin turns orange, should I just ignore this? Thanks ___ geda-user mailing list [3]geda-user@moria.seul.org [4]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user -- Stephan Böttcher FAX: [5]+49-431-85660 Extraterrestrische PhysikTel: [6]+49-431-880-2508 I.f.Exp.u.Angew.Physik mailto:[7]boettc...@physik.uni-kiel.de Leibnizstr. 11, 24118 Kiel, Germany ___ geda-user mailing list [8]geda-user@moria.seul.org [9]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user References 1. mailto:boettc...@physik.uni-kiel.de 2. mailto:r.but...@gmail.com 3. mailto:geda-user@moria.seul.org 4. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user 5. tel:%2B49-431-85660 6. tel:%2B49-431-880-2508 7. mailto:boettc...@physik.uni-kiel.de 8. mailto:geda-user@moria.seul.org 9. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Problems with a TDSON8 footprint
How can I do this? Suggestions? Or, since only the big pad that lays across the pads for each pin turns orange, should I just ignore this? Hi, I'll have a similar problem as I'll be trying to do a TO263S for a LM2575 Switcher from National. I thought of the problem before and I think that giving the same pin number to all the instances of the pad (each dent above) will highlight correctly. But I haven't tried it yet... will do it later tonight... if time is available. You will probably have to edit the .fp file in a editor as _I think_ that PCB footprint editor does not allow it... Good luck and thanks for sharing. JCSilva ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
