Small high temp red led?

Jun 13, 2007 22 Replies
D

LXK2-PD12-*00 (where * is Q, R or S).

This is a slightly orangish red high brightness LED lamp by Lumileds with maximum chip temperature 150 degrees C and characterizing current 350 mA.

The dominant wavelength (a color specification that largely but not always exactly means "hue") is in the 620's of nm typically. The typical peak wavelength is in the 630's of nm.

The main distributor is Future Electronics.

Sensitivity of photometric performance to temperature is something that I consider significant.

Link to the datasheet:

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Link to its manufacturer's homepage:

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- Don Klipstein ( snipped-for-privacy@misty.com)

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D

Heck, I have seen quite a bit of plastic/epoxy-molded silicon semiconductors rated for max Tj of 150 C, and a fair number of metal package silicon bipolar devices rated for Tj(max) of 200 degrees C.

As for LEDs: I have over a large majority of the past 30 years noticed that LEDs tended to do well at achieving the widely-mentioned 100,000 operating-hours life expectancy only when junction temperature is "largely" limited to 85 degrees C. High temperature tolerance has increased, mainly starting in the mid 1990's. I advise to consult datasheets for specific part numbers or relevant product lines (and down to specific color).

- Don Klipstein ( snipped-for-privacy@misty.com)

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When an LED is "getting cooked", according to my experience it fails optically more before electrically.

- Don Klipstein ( snipped-for-privacy@misty.com)

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