[SI-LIST] Re: How to know the powerconsuming of IC?
- From: "Andrew Ingraham" <a.ingraham@xxxxxxxx>
- To: "SI LIST" <si-list@xxxxxxxxxxxxx>
- Date: Fri, 21 Nov 2008 10:38:32 -0500
> It is quite straightforward, just measure the current drawn from
> different power supply (3.3, 1.2, 1.8 etc) of the IC under normal
> operation.
For a digital IC, that is pretty much it. There is some amount of DC input
power that goes out through the output ports, but (except perhaps for
something like ECL which has substantial static output current) it is
usually much smaller than the power consumed (dissipated) by the IC.
You can simulate it, or you can measure it.
For a more analog type IC (such as a regulator), add up all the power into
the IC on all its various pins (or subtract the power going out from the
power going in).
Andy
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