Hello all, Thanks for the wealth of information you have provided these last couple of days...thanks for the attachments also. My query was at an elemental level, but I can see that discussions can get " quite interesting" even after a basic rfi. FYI the 2004/2005 Power Supply Seminar issued by Texas Instruments has the following definitions for "clearance and creepage: "Clearance is defined as the shortest distance through air between two conductive parts." "Creepage is defined as the shortest distance between two conductive parts along the surface of any insulating material common to both parts." (pg 1-9) Semantics is the word that comes to mind...
Carlos "Brad Velander" <[EMAIL PROTECTED]> Sent by: [EMAIL PROTECTED] 12/14/2006 10:54 AM Please respond to Protel EDA Discussion List <[email protected]> To "Protel EDA Discussion List" <[email protected]> cc Subject Re: [PEDA] 500V power supply Andrew, No insult or derogatory meaning was read into your comments. I have read your posts for enough years to understand that typically you don't write with any personal malice. Well, ahhh, possibly, just maybe towards certain CAD software developers? 8^o I just wanted to make sure that the concept of creepage was not obscured or dismissed completely based on your comments. It tends to go beyond the basic PCB design in most cases but can very easily become a compromising situation to the end circuit performance or safety once said PCB is put into enclosures/environments. Further, I am not knowledgeable enough to give specific instruction or more detailed instruction. For myself I typically appreciate somebody just bringing the issues to light where I can further investigate them myself and determine if the "car" I am looking at is a Mazda or Toyota and get it right. Sincerely, Brad Velander Senior PCB Designer Northern Airborne Technology #14 - 1925 Kirschner Road, Kelowna, BC, V1Y 4N7. tel (250) 763-2232 ext. 225 fax (250) 762-3374 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Thursday, December 14, 2006 9:20 AM To: [email protected] Subject: Re: [PEDA] 500V power supply Fair enough. So creepage isn't an IPC term, but it could just as well be. Imo, in this instance it's fluff and does little more than to obfuscate the underlying principle. Got kids? Okay, then do this, teach the 4yr old that "NO! It isn't a tree, it's an Oak...Got it?" or "No, Bobby, that's not a car, it's a Mazda". To me, that sounds like mud, or worse, like unthinking rote. (SNIP) ____________________________________________________________ You are subscribed to the PEDA discussion forum To Post messages: mailto:[email protected] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/peda_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[email protected] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[email protected] ____________________________________________________________ You are subscribed to the PEDA discussion forum To Post messages: mailto:[email protected] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/peda_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[email protected] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[email protected]
