Breaking News
Power Tips

Power Tip 56: Estimate PWB interconnect inductance

NO RATINGS
View Comments: Newest First | Oldest First | Threaded View
Plasman
User Rank
Rookie
re: Power Tip 56: Estimate PWB interconnect inductance
Plasman   4/4/2013 7:59:29 PM
NO RATINGS
The first part this article is impracticle and misleading. The dominate factor of trace inductance is loop area and not length. Two 5 inch traces (drive and return) routed 1 inch apart would have much more inductance than the same traces routed 0.01 inches apart on a single layer board. The reason that adding the ground plane helps is that the effective area is reduces since the distance between the traces is reduced. For real life engineering, theoretical calculations of per unit length inductance of traces in free space with no consideration of return path are worthless.

gootee
User Rank
Rookie
re: Power Tip 56: Estimate PWB interconnect inductance
gootee   3/1/2013 3:03:12 PM
NO RATINGS
Yes, the units for the left half of table 2 (and in the accompanying equation) should be mm, not cm, and the inductances/mm in the third column should be divided by 10. OR, the numbers in the first two columns could be divided by 10.

Stuart.Currie
User Rank
Rookie
re: Power Tip 56: Estimate PWB interconnect inductance
Stuart.Currie   2/21/2013 8:09:52 PM
NO RATINGS
Good Article. I think I caught a typo. height and width metric dimensions in Table 2 are likely in (mm) not (cm).

Radio
NEXT UPCOMING BROADCAST
EE Times Senior Technical Editor Martin Rowe will interview EMC engineer Kenneth Wyatt.
Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Times on Twitter
EE Times Twitter Feed
Flash Poll