SiC alternatives - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 24th October 2012, 03:11 AM   #1
diyAudio Member
 
Join Date: Dec 2004
Location: Melbourne, OZ
Default SiC alternatives

The announcement about the closure of SemiSouth is indeed sad news, but this is not the end. If anything, SiC technology is only just starting to take off. Semisouth were certainly pioneers, but now there are a number of other semiconductor manufacturers starting to release their own SiC products.

I thought I'd start a thread on possible alternatives, hopefully others will add to this. There's plenty of interesting stuff on the horizon, but how much will be available to us DIYers?


Available 'Off the Shelf':

Semisouth - don't forget there will still be some stock at distributors for a while.

Cree - CMF20120D SiC Mosfet
Cree Power Products Z-FET SiC MOSFET and Z-Red SiC Schottky Diodes
Available from the major catalog distributors.


Available to OEM, possibly thru distribution:

Rohm - p/n SCH2080KEC 1200V Sic Mosfet
SiC MOSFET | ROHM Product Search Results

The Rohm website says samples are available.


Available 'real soon'

Infineon - now this is interesting, they are promoting a range of normally-on SiC JFETs. Samples are available '3Q2012' and meant to be in production next year.

CoolSiC? 1200V SiC JFET & Direct Drive Technology - Infineon Technologies


ST have also announced SiC Mosfets. See the link below for a presentation on technology for solar applications. Page 16 mentions a family of 1200V SiC Mosfets. I couldn't find anything more on their website, so probably still in development.

http://www.st.com/internet/com/SALES...eting_pres.pdf


GeneSiC - Have a range of SiC Super-Junction transistors on their website.
Mouser list a few 1700V devices on their website but no stock yet. Pricing looks reasonable (for the commercial temperature stuff - don't look at the +225C rated parts!!)



'Blue Skies' stuff:

These manufacturers mention SiC transistors, but little information on their website. Probably of limited interest to DIY as they'll be working directly with end customers on very specific applications.

Transic: Welcome to TranSiC
United Silicon Carbide Inc: United Silicon Carbide - high efficiency SiC power devices and sevices, JFET supplier

Any more?
  Reply With Quote
Old 24th October 2012, 04:34 AM   #2
diyAudio Member
 
wrenchone's Avatar
 
Join Date: Feb 2004
Location: Silicon Valley
Of course folks can also consider non-SiC alternatives. There's always innovative uses for silicon, and there's GaN as well, if someone will just come up with a device DIy-ers can use without a microscope and IR reflow..
  Reply With Quote
Old 24th October 2012, 08:55 PM   #3
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Cree device looks like usable on voltages above 40V, but I don't see if Rohm device can be used in analog amps, with it's huge non-linear capacitances.
__________________
"Our youth [...] have bad manners, contempt for authority; they show disrespect for their elders, contradict their parents, [...] and tyrannize their teachers. -- Plato, 447-367 BCE
  Reply With Quote
Old 27th October 2012, 03:27 PM   #4
Shinja is offline Shinja  Japan
diyAudio Member
 
Join Date: Jul 2008
In japan,
Rohm's one were used by Akihiko Kaneta who is japanese famous DIY amp builder.
some japanese shop sells SCH2080KE ,but bit expensive(about @6000-8000JPY).
  Reply With Quote
Old 30th October 2012, 10:55 PM   #5
Bigun is offline Bigun  Canada
diyAudio Member
 
Bigun's Avatar
 
Join Date: Jan 2009
Blog Entries: 2
maybe a 300B could be used instead
__________________
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
  Reply With Quote
Old 30th October 2012, 10:56 PM   #6
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Quote:
Originally Posted by Bigun View Post
maybe a 300B could be used instead
How many in parallel?
__________________
"Our youth [...] have bad manners, contempt for authority; they show disrespect for their elders, contradict their parents, [...] and tyrannize their teachers. -- Plato, 447-367 BCE
  Reply With Quote
Old 30th October 2012, 11:04 PM   #7
Bigun is offline Bigun  Canada
diyAudio Member
 
Bigun's Avatar
 
Join Date: Jan 2009
Blog Entries: 2
yes, you'd need one of those transformer thingies !

Actually, I think Cree has quite a bit of ambition yet and we'll see more from them. But the market is for switching devices, if they are linear that is only a side bonus. Perhaps good for Class D audio?

For Class A the Ciss seems often to be a bit on the high side for my liking, especially at reasonable voltages & currents.
__________________
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
  Reply With Quote
Old 30th October 2012, 11:31 PM   #8
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
My reasonable current (for the current project) is 60 mA idle, and reasonable voltage is 180V across the FET. And of course, the transformer thingy is needed, so called "matching transformer", for standard 100V input. But I can drive electrostats without it. Or line arrays, for exampe.
__________________
"Our youth [...] have bad manners, contempt for authority; they show disrespect for their elders, contradict their parents, [...] and tyrannize their teachers. -- Plato, 447-367 BCE
  Reply With Quote
Old 31st October 2012, 06:29 AM   #9
diyAudio Member
 
Join Date: Sep 2009
Location: Aarhus, Denmark
Quote:
Originally Posted by Bigun View Post
yes, you'd need one of those transformer thingies !
Nope,Transcendent Sound earlier this year announced a 300B OTL amp and I think Atma-sphere once made one as well.
But could be nice with some SiCs to play with for a secondary amp... ;-)
__________________
"People can't do what they should: room acoustics and speaker design - so they do what they can: new amps, cables etc." (Lidia)
  Reply With Quote
Old 31st October 2012, 12:49 PM   #10
diyAudio Member
 
vdi_nenna's Avatar
 
Join Date: Oct 2000
Location: PA, USA
Blog Entries: 1
Send a message via Yahoo to vdi_nenna
Quote:
maybe a 300B could be used instead
Let's not and say we did.
__________________
I build, therefore I am.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Semisouth SiC gate protection? Wavebourn Pass Labs 19 3rd April 2012 12:58 AM
SemiSouth SiC Power JFETs RocketScientist Solid State 105 19th February 2012 08:02 PM
SIC-SAFCO capacitor cedricb Parts 0 12th October 2010 09:02 PM
SiC JFETS revintage Pass Labs 15 27th August 2009 02:43 PM
SiC Schottky rectifiers. TugaTweaker Tubes / Valves 14 29th June 2005 07:57 AM


New To Site? Need Help?

All times are GMT. The time now is 07:06 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2