On Thu, October 18, 2007 11:47 am, Michael Malak wrote:
> When the TS-7260 is in sleep mode, how much power in mW does it draw?
> A back of the envelope calculation based on
> http://www.embeddedarm.com/epc/ts-bat3-spec-h.htm
> suggests 35-70mW, but I'm guessing it might be lower.
When the TS-BAT3 is in sleep mode the TS-7260 is actually off. All the
power consumption is from the TS-BAT3. The power drain would be
negligible (it normally runs in the microwatts while sleeping) except that
it has to wake up once per second to see if it is time to wake up the
board, so there will be a short period of time (probably a few
milliseconds?) where the BAT3 will be drawing several milliwatts.
> That web page says "1000 mA-hour of 5V power" and "TS-7260 can run an
> embedded systems for days in the field". So that's 5 Wh divided by 3
> days (low end of my interpretation of "days in the field") gives 70 mW.
> If we take it as 6 days, that's 35 mW.
The TS-7260 can run as low as 1/4 watt by powering of all non-essential
devices and running the CPU very slow (~14Mhz). If the board only runs
25% of the time this way, then the average power consumption would be
under 70mW.
--Michael
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