Re: LTSpice model for a SiC MOSFET

On 20/05/2025 1:13 am, Liz Tuddenham wrote:

Bill Sloman <bill.sloman@ieee.org> wrote:
 

I'm looking at a problem where somebody wants to step down a 1kV low
current source to 3.3V.
>
The Baxandall class-D oscillator could do it, but it needs a pair 1.7kV
MOSFETs for the job. The Infineon SiC IMH170R450M1 would do it - though
it's a much higher current part (10A) than the job needs (about 1mA).
>
I've dived into the Infineon rabbit-hole which promises LTSpice models,
but wasn't able to find one.
>
Does anybody know of a similar - ideally cheaper and smaller - part for
which there is an LTSpice model?

 How about a piezoelectric transformer run in reverse?

The piezoelectric transformer is an interesting idea.

Neon tubes illuminating a solar cell?

Neither is all that efficient.

Capacitive divider using a spare core in the
mains supply lead as one plate of the capacitor?  (Depending on supply
frequency and required output current.)

I can't see how that could work. Charging up lots of capacitor is series, and discharging them in parallel is one mode of current multiplication, but about the only kind of switch that would work would be a reed relay, and they are slow and don't last long when cycled fast.
Dry reeds are good for 10 million closures, mercury-wetted reeds for about 100 million, and neither is all that cheap or compact.
--
Bill Sloman, Sydney