need circuit designs for national LM-2678 IC so i can print and proceed with my PCB..the ones provided on national website r in portel format and PCB express wont open them.. dont know how to get protel :cry:
What do you mean "circuit design"? Are you looking for the PC footprint layout? Why can't you make it from the info on the data sheet? Which package are you using?
no dude.. i was looking for some example circuits implementing lm-2678 IC.. with PC foot print layout.. but anyway.. banging head on this stuff over the weekend finaly taught me a lot on working with lm-2678 circuits