4500 VDC MOSFETS ?

Author Topic: 4500 VDC MOSFETS ? (Read 2928 times)

Grumpy	4500 VDC MOSFETS ? « on: 2022-07-07, 00:21:10 »
Group: Tinkerer Hero Member Posts: 4267 tExB=qr	https://www.mouser.com/new/ixys/ixys-4500vmosfet-mosfet/ IXYS 4500V High Voltage Power MOSFETs pretty expensive, but interesting...

F6FLT	Re: 4500 VDC MOSFETS ? « Reply #1 on: 2022-07-07, 07:53:24 »
Group: Restricted Hero Member Posts: 2412	Impressive! I love the electronics industry. It makes components that I wouldn't have even dreamed of 10 years ago. --------------------------- "Open your mind, but not like a trash bin"

Grumpy	Re: 4500 VDC MOSFETS ? « Reply #2 on: 2022-07-07, 19:13:05 »
Group: Tinkerer Hero Member Posts: 4267 tExB=qr	Triggering a MOSFET with a @N3904 transistor in avalanche mode (see attached file). Building a pulse generator for 4kv appears to be possible. Edit: attached file Baker switching MOSFET with 2N3904 BJT in avalanche mode_RSI81990 (1).pdf (211.89 kB - downloaded 223 times.) « Last Edit: 2022-07-08, 17:56:38 by Grumpy »

gyula

Re: 4500 VDC MOSFETS ? « Reply #3 on: 2022-07-07, 23:58:55 »

Group: Tech Wizard
Hero Member

Posts: 1315

I came across this manufacturer some years ago on the web, they manufacture really high voltage rated solid state switches like thyristors, MOSFETs, IGBTs, also now in Silicon Carbide tech.

https://www.behlke.com/ https://www.behlke.com/productlines.htm The prices are surely high and sent by request. The ON resistances are much lower.

There is this paper from 1991 on a fast 8 kV switch using stacked MOSFETs and components of that era, maybe the principle can be used to build such HV solid state switches still less expensively for 4-5 kV than a dedicated single 4-5 kV device itself costs.
http://bromine.cchem.berkeley.edu/grppub/frbm2.pdf

Gyula

gyula	Re: 4500 VDC MOSFETS ? « Reply #4 on: 2022-07-08, 00:01:38 »
Group: Tech Wizard Hero Member Posts: 1315	Quote from: Grumpy on 2022-07-07, 19:13:05 Triggering a MOSFET with a @N3904 transistor in avalanche mode (see attached file). Building a pulse generator for 4kv appears to be possible. No file attached?

AlienGrey	Re: 4500 VDC MOSFETS ? « Reply #5 on: 2022-07-08, 08:38:16 »
Newbie Posts: 1606	Do you mean this post I posted on Dally thread ? Its on page 1476 ! Sil 4500 VDC MOSFETS ? p1476.png (116.52 kB, 732x421 - viewed 568 times.)

AlienGrey

Re: 4500 VDC MOSFETS ? « Reply #6 on: 2022-07-08, 08:47:50 »

Newbie

Posts: 1606

Also you dont have to use the PW chip device you can do it with a NE555
The problem with Mos Fets is it's capacitance and to get 1000 volt devices
you have to totem-pole them one way or another

and if one goes pop they all go pop

Another way is to use ultra fast VHF transistors again Enjoykin 2 published a circuit on the Dally thread
over on Over Unity. I'm sure you can find it I did have it on a slide but some troll has found a way of converting
JPG files to crud via a vbs file that's now doing the rounds so be aware!

4500 VDC MOSFETS ?

Switch mode boost.png (79.16 kB, 652x422 - viewed 514 times.)

Grumpy	Re: 4500 VDC MOSFETS ? « Reply #7 on: 2022-07-08, 17:57:40 »
Group: Tinkerer Hero Member Posts: 4267 tExB=qr	I edited my post to attached the article by Baker. Sorry, I've never looked at the Dally thread to see what it is about...

Grumpy	Re: 4500 VDC MOSFETS ? « Reply #8 on: 2022-07-11, 20:56:40 »
Group: Tinkerer Hero Member Posts: 4267 tExB=qr	I ordered a couple of these 4500v MOSFETs to try building and pulse generator using a 2N3904 or FMMT411 as an avalanche transistor trigger. Should make for some serious fun!