LN, I haven't seen Expresscard/34 spec. But I think if you can draw 1.0A from 3.3V, that means the effective resistance is R=V/I=3.3ohm, so the power loss is expected to be I^2R=3.3W. If the board can only turn 1.3W into heat, the left amount will either radiate or couple into its adjacent devices, which might cause EMI problem. Regards, Celine >From: "Long nguyen" <calixlnguyen@xxxxxxxxxxx> >Reply-To: calixlnguyen@xxxxxxxxxxx >To: si-list@xxxxxxxxxxxxx >Subject: [SI-LIST] Expresscard 1.0 Thermal Spec >Date: Sun, 27 Aug 2006 16:05:11 -0700 > > hello, The Expresscard/34 spec says that you can draw 1.0A from 3.3V but >theboard can only dissipate 1.3W of thermal power. Can someone clarify as >towhat this means? thanks in advance. LN >------------------------------------------------------------------ >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 FAQ wiki page is located at: > http://si-list.org/wiki/wiki.pl?Si-List_FAQ > >List technical documents are available at: > http://www.si-list.org > >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 > > ------------------------------------------------------------------ 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org 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