[SI-LIST] Question on Common Mode Chokes and Unused Windings
- From: Erin.McPhalen@xxxxxxxxxxxxxxxxxxxxxxxxx
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 9 Jul 2007 14:03:25 -0700
Hi
We use a board level common mode choke, with 3 common mode windings. We
currently only used 2 of the 3 windings. My question is what to do with
the unused windings. I see 4 options here:
a) Ground both sides
b) Ground only 1 side
c) Leave the unused winding floating
d) Use a 2 winding choke(not actually an option for me)
My concern is leaving an unintentional antennae on the board or interfere
with the common mode rejection of the choke.
Any insight would be greatly appreciated. Thanks in advance to any
answers I get to this problem.
Description:
3 Winding Common Mode Choke
1____(((((((((((____6
2____(((((((((((____5
3____(((((((((((____4
=======
Winding 1-6 and 2-5 are connected to signals leaving the EUT respectively.
Winding 3-4 is unused, so I am not sure what would be the best treatment
to this unused winding
Erin
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
