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03/26/2010, 11:17 AM
#905
 Originally Posted by rwhitby
It's in the battery, so it's only an indication of how the processor (or any other chip on the PCB, cause there are multiple chips) temperature may be changing. I'm surprised at how much weight people are putting on it, but it is the case that it's the only measure that is known about, so measuring something is better than measuring nothing.
The actual processor temperature could be completely different, depending on battery charge or discharge rates, or the thermal conductivity through the various materials between the die inside the OMAP3430 SoC package, the various layers of the PCB, the various bits of metal shielding and plastic casing, the battery casing, and the battery internals.
And of course it's not just the OMAP3430 that will be affected by excess temperature. Other chips on the PCB also have temperatue vs lifetime characteristics and limits ...
-- Rod
All very true. The main reason I'm using as an indicator isn't for precise #, but for a signal of things getting too hot. The tests done by caj2008 and unixpsycho were based on battery temperature #, with a reported device failure at 62*C (I believe). Sure other factors like outside temperature, whether or not the slide is out, etc. will cause various, but a recommended 45-50*C max is a good reference point for what's available to read device temperature currently
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