Best multiple/many individual MOSFET driver IC?

[Rive]

On the other hand, if current is flowing and it is used for control purposes, then switching off is no simple matter. In such case I would rather choose the limited reliability/lifetime.

I don't know what are you trying to do with relativity, but better do the math first because any (mechanically feasible) effect is usually too small to be measured.

I have a feeling that this won't end well. But please keep us updated anyway.

 

[artis]

I did not understand your concern Rive?

 

[Rive]

Which one?

Regarding relativity, it is exactly as I said. The effects are usually too small (needs math to see how small) to be measured, and even attempts needs rigorous accuracy both in design and actual doing. Mechanical switching - well, no way accurate enough. But since I have very little information about what are you trying to do, I can't say much.

Regarding switching: mechanical switching is an art in itself.
As an example, see this or this.
Since you are trying to control a MOSFET directly, the dissipation will inevitably increase, but with the available information there is no way to give an estimate. You have to be careful.

 

[Baluncore]

MOSFETs do not mix with brush commutators without signal conditioning networks and bipolar gate-drivers having stable power supplies.

My concern is that artis is asking for technical advice on how to build a leaning-tower of left-overs, something that will continue to rise in height and complexity until it collapses under the number of components to be mounted, along with the profusion of electrical connections that will have to be made.

The KISS principle says, make it work now with the minimum, a commutator and the light globes is all that is needed.