Typically a system like this would be a closed system with condensing apparatus above the fluid (its close to $500/Gal) to reclaim the vapor.
All my metalwork will be grounded to the "Rack" chassis, and that will go to 4th prong of the 3 phase power, with an 8ft rod hammered in the ground, or just throw a wire down the water well...
Rob
Dissolved metal particles? I have worked with one of these systems and we did not have plastic everywhere and I'm not aware of any of these types of problems. First I guess, it's not water.
Of coarse my application was different. I had bare die bump bonded to a Kapton lead frame only touching at the bond pads. The approx. .350sq" die were powered up to dissipate about 20W, causing the surface to boil off the fluid and maintain 170-175C on the die. The fluid can be maintained at sane temps to allow typical operation of the remaining circuit components, pcbs etc. It was a Burn-In system. These types of temps would accelerate life about 17 times. 48 hours of burn in = 1 month of life.
Anybody got some huge 200v computer electrolytics? You can donate them to a great cause, Or I might buy them... I mean BIG! Like 50,000+Uf big.... They tend to stay on the "Expensive" side of my wallet.. Darn! I keep seeing Homer saying "DoH"!! Ok, I will settle for some electrolyte "paste" some foil and dialelectric paper, I got nuts and a lot of beer cans...
Rob
Rob
Last edited:
what are you going to do with those caps? you can not just add caps on a SMPS PSU. That will get you into trouble.
the caps
Rob
The linear type power supply/ or should I say analog.
They are used for the power supply workaround, my 5 lb act of smartness 😀 Just imagine If I would have went to skewel, WoW, I never ever took 1 class in elechtrisity/or electrohnix for that matter.. I just remember everything i ever read, that is if I'm interested in it...
Rob
The linear type power supply/ or should I say analog.
Last edited:
This is deja vu or something. I remember in the dim past (anything over about 3 days ago), a Monster Amp that was actually attempted and ended in a dismal and expensive failure. I can't watch. (But i'm peeking through my fingers in a mixture of dread and fascination.) Don't....don't...
failure
Failure is not a word in my vocabulary, I was told that maybe I should take baby steps or something like that, well i did.. It was my aleph 3, now I want big boy "toys"!
Waaaaaaaaaah Waaaaaaaaaaah
Rob
Dare to dream and dream to live
This is deja vu or something. I remember in the dim past (anything over about 3 days ago), a Monster Amp that was actually attempted and ended in a dismal and expensive failure. I can't watch. (But i'm peeking through my fingers in a mixture of dread and fascination.) Don't....don't...
Failure is not a word in my vocabulary, I was told that maybe I should take baby steps or something like that, well i did.. It was my aleph 3, now I want big boy "toys"!
Waaaaaaaaaah Waaaaaaaaaaah
Rob
Dare to dream and dream to live
Last edited:
The FET is already at NRND status and will probably be obsolete before long.
STE48NM50 STMicroelectronics | Mouser
Patrick
STE48NM50 STMicroelectronics | Mouser
Patrick
130V rails?
I honestly hope you're not going to electrocute yourself.
Failure damage grows at least squared with the higher rails...one time I blew a Schottky bridge rectifier in a 25V rail circuit (Schottkies prefer to die as short). That was not so nice but also not such a big deal.
I don't want to imagine what would happen in the mu-monster case. Already the stored energy in the caps should be sufficient for a nice wielding joint.
Might come handy to explain your wife how to use a fire extinguisher.
I honestly hope you're not going to electrocute yourself.
Failure damage grows at least squared with the higher rails...one time I blew a Schottky bridge rectifier in a 25V rail circuit (Schottkies prefer to die as short). That was not so nice but also not such a big deal.
I don't want to imagine what would happen in the mu-monster case. Already the stored energy in the caps should be sufficient for a nice wielding joint.
Might come handy to explain your wife how to use a fire extinguisher.
Last edited:
chit
Rob
I just read that on digikey's site too, only 12 left then non-stocking item.. Gawd! We need a replacement and fast. Thank you for pointing this out I only looked at the price and it was "in stock".. Now I have another task, and I wandered why ST didn't call me back.... I'll see what I can find, they can always make more if there is a "demand" I'm sure, but the price jump may be high.
Rob
An externally hosted image should be here but it was not working when we last tested it.
Just found the "stockpile" over 1500 of them! STE48NM50. Whew, that was close, and now another fone call tomorrow... Guess I get them first.. There is also the STE48NM70 Also found this, might come in handy! [FONT=Arial, Helvetica, sans-serif]
25 SHEETS of 99.99% MIN Purity Indium Foil
75um (0.075mm) x 62mm x 62mm nominal dimensions
made in the USA.
[FONT=Arial, Helvetica, sans-serif]For thermal transfer applications, thinness counts[/FONT]
[FONT=Arial, Helvetica, sans-serif]This is not Chinese made or recycled foil, which can have unknown impurities and inclusions. These can cause localized thermal spikes in the chip reducing chip life and performance. This is engineering grade first quality foil[/FONT]
[FONT=Arial, Helvetica, sans-serif]The Thermal performance of Indium exceeds those of Thermal Grease, Low Melt Alloy, Lead and Indium/Silver Alloy[/FONT]
[/FONT][FONT=Arial, Helvetica, sans-serif]For thermal transfer applications, thinness counts[/FONT]
[FONT=Arial, Helvetica, sans-serif]This is not Chinese made or recycled foil, which can have unknown impurities and inclusions. These can cause localized thermal spikes in the chip reducing chip life and performance. This is engineering grade first quality foil[/FONT]
[FONT=Arial, Helvetica, sans-serif]The Thermal performance of Indium exceeds those of Thermal Grease, Low Melt Alloy, Lead and Indium/Silver Alloy[/FONT]
Rob
Last edited:
Not direct replacement, but similar specs.
Capacitances quite a bit higher, but probably also Yfs.
Also NRND, but over 100 in stock.
http://www.digikey.com/product-detail/en/IXFN48N50/IXFN48N50-ND/242038
http://www.mouser.com/ds/2/205/ixys_93001-342316.pdf
Patrick
Capacitances quite a bit higher, but probably also Yfs.
Also NRND, but over 100 in stock.
http://www.digikey.com/product-detail/en/IXFN48N50/IXFN48N50-ND/242038
http://www.mouser.com/ds/2/205/ixys_93001-342316.pdf
Patrick
Indium is metal and electrically conductive.
You still need electrical isolation between FET & heat sink.
Patrick
You still need electrical isolation between FET & heat sink.
Patrick
IRF
Rob
I know they are different, but a lot of companies make "power mesh" isotops, including IRF, and others. There is a workaround, thank GoD I found 1500 of them, there may be another thousand at pass headquarters, all matched sets, ok I'm dreaming. I have given up worring about these, my concentration lies in other areas right now. I have already spent 1 day in phone calls, bookmarks, equations, theories, parts, solutions and such... I guess the easy part was drawing the Gefilter, not making it "real"
Rob