Where are all the 200c GaN fets?

On Wed, 19 Aug 2015 08:20:57 -0700 (PDT), Yzordderrex Gave us:

Maybe these guys have some offerings...

Ok, thanks. I'm actually looking at them and Gan Systems. Seems as though all of the touting 200c & 300c parts has been boasting up to now. There is a lot of research going into these parts so maybe soon. I have talked to s ome people and they are having success running 150c parts at 200c. I not i nvolved with designing for production - good thing.

thanks Bob N9NEO

On Wed, 19 Aug 2015 19:05:36 -0700 (PDT), Yzordderrex Gave us:

handle more than silicon devices does not mean you need to push designs to that point.

You designing for an exposed space application with very poor thermal management capacity?

Other direction :)

On Thu, 20 Aug 2015 13:23:21 -0700 (PDT), Yzordderrex Gave us:

Mining?

Downhole, presumably. A few years ago, I tried convincing a very smart guy at a major oilfield services firm to let us build him a thermoacoustic frid ge for downhole, but apparently there's some lore in that business that say s you shouldn't try active temperature control. (I had the calculations all done, based on the work of the LANL thermoacoustics group.)

It's a pity, because thermoacoustic fridges are a natural fit for downhole work--all metal, no moving parts. You turn on the Chromalox element at one end, and the other end gets cold. (you do have to pull the heat out from th e middle, of course, but that's what the flowing mud is for.

Cheers

Phil Hobbs

I suspected that it was a "down hole" application. ;-)

Have you looked at SiC? My next project looks like it'll be based on some SiC FETs. I'm not too concerned about abnormal temperatures, though so haven't looked that far.

On Thu, 20 Aug 2015 17:36:56 -0700 (PDT), Phil Hobbs Gave us:

That would presumably be a lot cooler than the drill head too.

Use Erbium. Heheheheh!

[There probably isn't actually mud as most instruments aren't used while drilling, so the fluid is oil/gas/water often with corrosive nasties.]

But the whole point of downhole electronics is that it doesn't last too long and needs regular replacement and repair. What's more, the customers are accepting of that.

Keep your goddam fridge outta my well. People gotta eat.

Cheers

--
Syd

Yessir, your holeyness. ;)

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs 
Principal Consultant 
ElectroOptical Innovations LLC 
Optics, Electro-optics, Photonics, Analog Electronics 

160 North State Road #203 
Briarcliff Manor NY 10510 

hobbs at electrooptical dot net 
http://electrooptical.net