Logic voltagre P and N FET high side power control

123

02:18:27

Simple example of how to control power to loads via N or P FET technologies.

published 9 years ago

hurz

9 years ago

The N version is not compareable with your P one.

dine

9 years ago

fixed

hurz

9 years ago

No, pmos circuit is common source topology, but your nmos is common drain. But to compare them they have to have the same topology. Comon source or drain (CS or CD).

dine

9 years ago

It wasn't my intention to compare them. The intention was to demonstrate a solution to acheive high side switching using NFETs

hurz

9 years ago

I think the right one is not a solution. See how big the nmos is in comparison to the left solution. And that big mosfet to drive this little lamp. Its in best case a ugly work around.

dine

9 years ago

a box-fresh nmos held open can not drive this little lamp. why don't you fork it and fix it?

hurz

9 years ago

Box-fresh? They are to small to find in a box. It was you who used the terminus "simple". Yes sure i can fix it for you and make it simple

dine

9 years ago

i think you are stuck in a world of simulating, it's not always going to be a 'little lamp' - in this use case it's a 8A load i'm modelling for - without proper spice models it is impossible to reflect those details here. also wind your neck in.

hurz

9 years ago

At least you learned, things are not so "simple" like your "simple example" statement. 8A, fine! Lets start here, and we will see how "simple" it is http://everycircuit.com/circuit/5282317232242688

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