mamarzec asked 7 years ago

Hello,
I have a problem with determining temperature to my prediction analysis with 217plus method.
This method requires 3 kinds of temperature: TAO (ambient —operation), TAE (ambient non-operation), TR (juncion temperature). We would like use thermovision camera and read these temperatures from thermograph but how to do this?

TAE — we can read this temperature when the power is off (then this temperature is the same everywhere)
TR- temperature rise above the ambient operating temperature (the junction temperature is, therefore, TAO+TR)
But what is TAO? Where does it measure? Is TAO next to the component (lets say 1cm)? Here is a helpful picture
http://i.cmpnet.com/powermanagementdesignline/2010/08/C0613-Figure1.gif
Regards