UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - High side high voltage MOSFET switching with 3V logic drive?

Argus25 · 23rd Jan 2019, 12:12 am

In a project a while back I used some ASSR-1228-002E "solid state relays" that have a photovoltaic diode coupled to output mosfets:

https://www.broadcom.com/products/op...assr-1228-002e

Looking at these again, the voltage rating for the "switch" is 60V, but there might be higher voltage versions. If you used these there is no switch voltage drop to worry about and the isolation is excellent.

They can be seen in this project on page 8:

http://worldphaco.com/uploads/INCREA...OR_TO_AUTO.pdf

It looks like they have 400V ones that would be just fine, they have a low on resistance:

https://www.broadcom.com/products/op...assr-4120-002e

23rd Jan 2019, 12:12 am	#7
Argus25 No Longer a Member Join Date: Oct 2016 Location: Maroochydore, Queensland, Australia. Posts: 2,679	Re: High side high voltage MOSFET switching with 3V logic drive? In a project a while back I used some ASSR-1228-002E "solid state relays" that have a photovoltaic diode coupled to output mosfets: https://www.broadcom.com/products/op...assr-1228-002e Looking at these again, the voltage rating for the "switch" is 60V, but there might be higher voltage versions. If you used these there is no switch voltage drop to worry about and the isolation is excellent. They can be seen in this project on page 8: http://worldphaco.com/uploads/INCREA...OR_TO_AUTO.pdf It looks like they have 400V ones that would be just fine, they have a low on resistance: https://www.broadcom.com/products/op...assr-4120-002e Last edited by Argus25; 23rd Jan 2019 at 12:18 am.