How to bake a P7

[spencer]

I have a P7 Maglite build planned and I would like to take the precaution of baking the LED. How do I bake a P7? My oven only goes down to 170ºF (77ºC) and the spec sheet says to bake at 60±5ºC (140±9ºF). The Cree LED's I could do in my oven because they need 80ºC (176ºF). Just wondering how people have done it.

 

[bfg9000]

I use an agar plate incubator, but it's summertime--just leave it on the dashboard of your car!

 

[LukeA]

Leave the door cracked.

 

[RyanA]

What are the benefits?

 

[LukeA]

What are the benefits?

The dome won't delaminate when the emitter is reflow soldered.

 

[marschw]

How/why would you reflow in a P7 mag build?

 

[RyanA]

The dome won't delaminate when the emitter is reflow soldered.

Thanks Luke. Kudos BTW.:twothumbs I'm very impressed with your knowledge and understanding of many of the wide range of subjects here on CPF (Waaay over my head most of the time). Even more impressive at 17. Most kids your age, blah, blah blah... I'm sure you hear this a lot. But thanks nonetheless.

 

[LukeA]

Thanks Luke. Kudos BTW.:twothumbs I'm very impressed with your knowledge and understanding of many of the wide range of subjects here on CPF (Waaay over my head most of the time). Even more impressive at 17. Most kids your age, blah, blah blah... I'm sure you hear this a lot. But thanks nonetheless.

Why thank you!

 

[RyanA]

You're welcome.

 

[spencer]

What if I epoxied the P7 on a DHS P7 heatsink, hooked it up with leads and powered it at 2.8A? Would it get up to 60 degrees? If it did that would be great.

Just a brainwave I had. Let me know what you think.

 

[tebore]

What if I epoxied the P7 on a DHS P7 heatsink, hooked it up with leads and powered it at 2.8A? Would it get up to 60 degrees? If it did that would be great.

Just a brainwave I had. Let me know what you think.

I'm sure it would and it'd do so pretty quickly.

 

[Tinaled]

really a good idea,but I am also confused how to bake the P7?Waiting for your good news

 

[JohnR66]

Cooking ovens are not a good idea. Set to 150 Deg F, it could swing well over 200 Deg during the heating cycle and heat can radiate to trays making them even hotter.

 

[Der Wichtel]

Why do you want to bake your P7 with 60°C?

 

[joecarrow]

If you're not reflow soldering, there's really no good reason to bake the chip. The point of baking is that as a part sits in the air, it soaks up a small bit of moisture from the atmosphere. At reflow temperatures, the water vapor expands and damages the chip. The recommendation of the dashboard of your car sounds great.

If you're a manufacturer and buy them in bulk, they (like many surface mount parts) come vacuum packaged in foil with a gigantic "do not eat" packet that turns from blue to pink with exposure to humidity.

The less you heat the part during soldering, the less chance there is of damage. If you make it through soldering without damage, you're done- so running current through the device to achieve that temperature sounds unncessarily risky to me.