Nick, note that the 3.4W are "absolute maximum" which usually means the part is going to die if you go over that.
The part it self needs only 5V@25mA (when switching) plus the losses of the hv switches. In a nixie clock i guess there are always only 3 outputs on per chip. I use the plcc 5122 which only has 1.2W heat dispatch and it doesnt get warm or so at all. A crude way to solder the center pad is placing a hole under the chip and then solder it that way, but i'll give my planned board to a friend who has a soldering machine at work :) -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/aa3dcadd-d3c7-4424-b5cb-f197188c5f1c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.