Lower Thermal Resistance for XLamp® XP-G White LEDs
Update from Cree: Changes to XPG
- Lower thermal resistance: 4 C/W
- New tape drawing
- Added color shift data for warm white
- Calculated flux values for 700 mA, 1000 mA, 1500 mA
What does it mean: the ability to remove heat from the the die has dramatically improved
performance/lumen's drops as heat builds up, so the cooler it runs the better. I'm not a led geek so I cant tell you any thing more than that
nothing to write home about.....
the XML is 2.5C/W , lower number means it runs cooler.
the number is also, just for bare LED ,...
that means, by the time it is mounted on the star board, it is even worse,
probably by a factor of 1.5-2x .
for an XP-G at 1.5A max, on a star board, would mean it's at least 32C hotter,
more like 35-40C plus. with multi-led, add 10C.
these are my bender numbers, my thumb x pi,
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