I'm trying to wrap my head around thermal management of LEDs and LED driver circuits. http://blogs.indium.com/blog/amanda...ure-of-leds-with-thermal-management-materials A concern has been expressed that a lighting supplier needs to demonstrate (not sure how) that the LEDs of the lighting fixtures being supplied are properly thermally managed. I'm not sure that this is necessary, and if it is, I'm not sure what exactly I would require. The required performance of the lights (lumen output, CCT, etc.) has been specified. If the light fixture fails to perform as required, that would constitute a technical failure. So, I guess I'm looking for some direction here. Does anyone know the basics of proper thermal management of LEDs and/or LED driver circuits? The data sheet of the LED says that its absolute maximum junction temperature rating is 120 degrees Celsius, while the absolute maximum operating temperature rating is 100 degrees Celsius. It can also handle up to 180 mA of current and can dissipate up toe 594 mW of power and has a typical forward voltage rating of 2.88 V. It's thermal resistance can be as high as 19 degrees Celsius per watt. And it appears that its typical solder temperature is around 25 degrees Celsius. ##Tj = Ts + R \times P## But something doesn't add up on the data sheet. If Tj = 120 degrees Celsius when Ts = 25 degrees Celcius, then either the power dissipated needs to be more than 0.594 W or the thermal resistance needs to be higher than 19 degrees Celsius / watt, or both.