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I'm talking about LED lights which are used to light homes from main wall supply [230V] here.

If I developed a LED driver and its heat sink, is there is a way to measure its stability against thermal runaway? I mean to calculate whether the heat sink is enough or the protection mechanism of the driver is enough.

What kind of machines are there to collect these data and measure the integrity in industry assembly lines? What data should I collect and what model should be used?

I also want to know the benchmarks and standards on thermal stability used in industry.

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    \$\begingroup\$ LEDs in serious applications should (must) be driven in constant current mode. There is then no prospect of "runaway". The issue then is whether the LED die temperature is maintained at an acceptable level. Reputable LED manufacturers provide a very large body of data re thermal aspects. \$\endgroup\$ – Russell McMahon Sep 23 '13 at 2:03
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    \$\begingroup\$ Heat sinking is the main area of attention and this is a well understood discipline. Once designed an LED mounting system will generally work as designed if manufactured correctly. LEDs are usually operated substantially below levels where active temperature management is required (ie altering power to control temperature is not a usual design practice). \$\endgroup\$ – Russell McMahon Sep 23 '13 at 2:04
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LEDs in serious applications should (must) be driven in constant current mode.
There is then no prospect of "runaway".

The issue then is whether the LED die temperature is maintained at an acceptable level. Reputable LED manufacturers provide a very large body of data re thermal aspects.

Heat sinking is the main area of attention and this is a well understood discipline. Once designed an LED mounting system will generally work as designed if manufactured correctly. LEDs are usually operated substantially below levels where active temperature management is required (ie altering power to control temperature is not a usual design practice).

..... Luxeon Thermal design using power light sources
.......... and LUXEON Thermal Management Capabilities

...Cypress - Thermal Design Considerations for High Power LED Systems

.........ECN LED thermal design

....Digikey Practical LED thermal desigm

Wikipedia Thermal_management_of_high-power_LEDs

Example only - heatsinks


CFD model of thermal transfer from an LED bulb.
See Wikipedia reference above for GIF animation of this.

enter image description here

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