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Date: Sat, 14 Aug 2021 06:40:25 -0700
Subject: Re: [EE] Tek DSO display issue?
Thread-Topic: [EE] Tek DSO display issue?
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On Sat, 14 Aug 2021 23:20:00 +1000
K S <kresho@gmail.com> wrote:

> Seems to me logic level FETs are harder to find these days than
> before?
>=20
> I searched digikey and mouser and I'm not finding many with
> characteristics quoted at Vgs of 5V or less. Of course I need all the
> other bells and whistles to - low Q, Rds, decent Vds (80V+) and Id
> (30A+).  Maybe I'm not looking in the right place?

>From my observations of data sheets you don't get high Vds with logic
level drive. I suspect the required doping to get logic level operation
compromises the maximum Vds.

I suspect you will need a FET driver like the Microchip TC6xxx series
to get a high enough gate drive, and then you also won't be quite so
worried about the gate charge figure.

have a look at
https://www.microchip.com/en-us/products/power-management/mosfet-drivers


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