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William Murray

Designing for High Temperature With Discrete Components

William Murray
RedDerek
RedDerek
8/6/2013 7:45:55 PM
User Rank
Master
Ovens
With the phasing of incandescent light bulbs and the push for LED. Be interesting to see the first oven-rated LED light. Otherwise I see the need for light pipes to get that oven light working properly.

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RedDerek
RedDerek
8/6/2013 7:44:54 PM
User Rank
Master
Re: High Temperature Applications
Down-hole applications was one area I helped out a couple of customers as an app engineer. Trick is to watch the deratings. They had a small form-factor to deal with and used ICs. But the trick is to ensure the die temp does not get above 150C. After this other issues really start to take effect. Going to 200C and up start doing damage to the die.

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Maciel
Maciel
7/31/2013 9:49:48 PM
User Rank
Newbie
LED LAMP ! VERY HOT...
In the past we have developed a product for vehicular application, was a lamp, LED truck off road, never imagine that he had developed a greenhouse, the temperature inside the lamp reached over 60 º C, so the LEDs in some cases came dissoldarem plate obviously the temperatuda dissipated on them was much higher ...

After a few weeks in the product have found that using cards multylayers conseguriamos better dissipate heat from the LEDs to form one suportassem few hours of continuous operation ... The resistors used were from VISHAY, high temperature but also the most efficient solution was actually the PCB ...

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eafpres1
eafpres1
7/30/2013 3:00:49 PM
User Rank
Blogger
Re: High Temperature Applications
@William--thanks.  I forget about ovens.  Growing up they were chemical/mechanical devices (i.e., gas regulators and fire).  Then relatively simple electrical appliances.  Now they are full of electronics too!

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BillWM
BillWM
7/29/2013 8:10:31 PM
User Rank
Blogger
High Temperature Applications
High Temperature Component Applications areas include:  Ovens(Microwave and Conventional, both Home, Commercial, and Industrial),  Down Hole Petroleum Exploration and Production,  Power Generation, (and Transmission) ,  Aerospace/Mil, Automotive, and Transportation, as well as others.

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eafpres1
eafpres1
7/29/2013 7:50:24 PM
User Rank
Blogger
What applications?
Hi William--good points.  What applications were you thinking about?  In the consumer world, things like -20 to +40C may get by, in Automotive it is usually -40 to +80 or more (I once worked on an assembly that was mounted directly by the tailpipe--it was made of injection molded plastic and had to survive 125C and being dunked in cold water repeatedly--yikes), and of course in mil/aero the temperatures can be higher.  Then you have power generation and other such apps with really high temps for some things.

What are the big applications that create enough market for specialized "hot" distributors?

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