Okay, I just checked the NDA documents. While I didn't find anything about power consumption, I found some tests on the heat development of the OMAP5, and they lined out their scenario there (swpa195b.pdf)
They were running a tablet and the power consumption in their scenario was like this:
Total system Power: (Total System Power includes other components such as PMIC, display, etc.) 6034 mW
OMAP Power: 4128 mW
Memory: 200 mW
The OMAP reached a temperature of 90°C, according to their documents, proper cooling could cool it down about 20°C (which would match what I measured, about 70 - 74°C maximum temperature when fully stressing both cores).
We don't know if they were running at full power, but it probably makes sense if you want to test out heating.
So it seems with full power the OMAP5 uses about 4128mW (2W per core). Our EVM was using 6250mW, so 2000mW is everything else except the OMAP5 (memory, USB, HDMI, etc.)
In our case that would mean that right now idling around the SoC should use 250mW... which would be a lot better.
It seems like components really need quite some power. Disconnecting the HDMI monitor lowers power consumption of 200mW.
Disconnecting the HDMI monitor, the Pyra PCB and the USB keyboard lowers the total power consumption to less than 2W when idling.
Disabling these components will probably save quite a bit of power (it does in the Pandora).
Any easy way we can do that?
Anyways, I've sent the TI OMAP5 dev team an eMail about the power consumption, and whether they did any tests.
One of the devs (Arno) mentioned in August: "We are targeting to have the OMAP543x in the 2W when all the power features will be implemented."
I can't imagine he meant that it will use 2W when idling...