[SI-LIST] Re: Expresscard 1.0 Thermal Spec

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
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