Playing with dice

[Clive Arthur]

SiC JFETs from United SiC are very useful, but the TO247 package is very
large. The dice are very small at about 1.1mm square.

Is it beyond riches to have say a hundred dice packaged in SOT-223, are
there places that do this?

Totally outside my experience.

--
Cheers
Clive

 

On Thursday, February 6, 2020 at 2:47:04 PM UTC-8, Clive Arthur wrote:

SiC JFETs from United SiC are very useful, but the TO247 package is very
large. The dice are very small at about 1.1mm square.

Is it beyond riches to have say a hundred dice packaged in SOT-223, are
there places that do this?

Totally outside my experience.

--
Cheers
Clive

Yes, dice bonding in WuHan. But you will be playing dice with your life.

 

[John Larkin]

On Thu, 6 Feb 2020 22:46:55 +0000, Clive Arthur
<cliveta@nowaytoday.co.uk> wrote:

SiC JFETs from United SiC are very useful, but the TO247 package is very
large. The dice are very small at about 1.1mm square.

Is it beyond riches to have say a hundred dice packaged in SOT-223, are
there places that do this?

Totally outside my experience.

Here's a Cree SiC fet:

https://www.dropbox.com/s/hnu2b7qlfw98bwq/Cree_Chip.JPG?raw=1

Seems silly to put that into a giant TO247 package.

Compare that to some silicon parts:

https://www.dropbox.com/s/4nxm7m2q3j3buvc/ExFets.jpg?raw=1

Not enough parts come in SOT-89.

--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

 

[Winfield Hill]

Clive Arthur wrote...

SiC JFETs from United SiC are very useful,
but the TO247 package is very large.

Rohm and United SiC both offer TO-220 parts.


--
Thanks,
- Win

 

[Winfield Hill]

John Larkin wrote...

Not enough parts come in SOT-89.

Hear, hear!!


--
Thanks,
- Win

 

On Thu, 6 Feb 2020 22:46:55 +0000, Clive Arthur
<cliveta@nowaytoday.co.uk> wrote:

SiC JFETs from United SiC are very useful, but the TO247 package is very
large. The dice are very small at about 1.1mm square.

At least big packages prevent installing multiple dices too close
together . Getting the heat out to a large heatsink is an issue.

Is it beyond riches to have say a hundred dice packaged in SOT-223, are
there places that do this?

Totally outside my experience.

 

[Clive Arthur]

On 07/02/2020 03:10, Winfield Hill wrote:

Clive Arthur wrote...

SiC JFETs from United SiC are very useful,
but the TO247 package is very large.

Rohm and United SiC both offer TO-220 parts.

But not their JFETs.

Sure I could do it other ways, but for this application, a normally-on,
high-voltage, reasonably fast analog switch with -ve a few volts to
switch off fits so well in all but size.

--
Cheers
Clive