Re: The other power transistor aiming to dominate the age of SiC

On 2024-09-06 13:28, john larkin wrote:

On Fri, 6 Sep 2024 15:08:33 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
 

john larkin <jlarkin_highland_tech> wrote:

On Fri, 06 Sep 2024 10:13:44 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
>

The Other Power Transistor Aiming to Dominate the Age of SiC
https://www.electronicdesign.com/technologies/power/article/55138019/qorvo-optimizing-high-density-power-with-sic-devices-and-advanced-circuit-design
Explore the integration of silicon-carbide (SiC) technology and advanced
circuit design to enhance the overall density and efficiency of power converters.
See also:
https://www.qorvo.com/products/power-solutions/sic-fets
>

>
I used a Cree SiC fet, in my Pockels Cell driver. As a high-voltage
switch, the figure of merit    Rdson * Cout   was many times better
than I could get with any silicon mosfets. The circuit wouldn't have
worked with silicon.
>
But driving the gate was a real nuisance. I went from -5 to +18 in a
couple of nanoseconds, which took a special GaN driver circuit on its
own baby board,
>
https://www.dropbox.com/scl/fi/y3r0qyo0hkubpc9td02y1/T852C_globbed.JPG?rlkey=gbkhx5zwaisr7e84acf5kuv80&raw=1
>
The glob-top is mostly to protect the absurdly fragile EPC GaN fets,
and give them a bit of extra cooling. Finding the right glob stuff was
a project of its own.
>
There are beginning to be some specific SiC gate drivers, but the
market seems to be power conversion, so the drivers are fairly slow
and have gigantic prop delays.
>
I note that EPC said that they would never sell packaged parts, but
now they do.
>
>

>
I used to have an AD databook with an index. The entry for “digital” was
“You must be joking.”
>
Cheers
>
Phil Hobbs

 Rumor has it that Intel is about to introduce a new line of opamps.
 

Those poor guys are lucky to get anything to work these days.  Boeing, Intel, Volkswagen, who's next?
Financialization and ESG towards a better world, excelsior!
(Not so much.)
Cheers
Phil Hobbs