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Registered Member #3781
Joined: Sat Mar 26 2011, 02:25AM
Location:
Posts: 701
Oh ok, well if they can withstand 120C, it's probably fine. I guess you could mount on the pcb behind the led if you wanted but idk if that would do much
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
Looks like fun. You know better than to stare at intense LED's.
The datasheet (linked in OP) includes diagrams and numbers related to thermal management. LED efficiency and lifetime get better as the junction temperature is reduced.
Normally these emitters are surface mounted onto PCBs with large areas of copper foil to spread and dissipate the heat; in fact the datasheet has a chart of junction temperature vs. PC board area. Your breadboard is better than nothing, but the copper heat-flow path is broken up. Be creative and think about thermal resistance. Which terminal of the LED package conducts most of the heat?
[edit] the Vishay thermal information was not in the datasheet, but in an app note link also found on the product page in OP.
Registered Member #3943
Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
klugesmith wrote ...
Looks like fun. You know better than to stare at intense LED's.
The datasheet (linked in OP) includes diagrams and numbers related to thermal management. LED efficiency and lifetime get better as the junction temperature is reduced.
Normally these emitters are surface mounted onto PCBs with large areas of copper foil to spread and dissipate the heat; in fact the datasheet has a chart of junction temperature vs. PC board area. Your breadboard is better than nothing, but the copper heat-flow path is broken up. Be creative and think about thermal resistance. Which terminal of the LED package conducts most of the heat?
[edit] the Vishay thermal information was not in the datasheet, but in an app note link also found on the product page in OP.
Are you saying it is a bad thing to stare into the die whilst it is on?
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