internal nodes GRRRRR

Haven't run into that one for a built-in LTspice model. Maybe it's one of the post-Engelhardt ones.

Do they have a PSPICE model? If so, it could maybe be fixed with a search+replace.

Or a 1-ps transmission line--duelling bugs!

Cheers

Phil Hobbs

That's a neat idea. A txline is a DC-coupled 1:1 transformer.

Assuming that's really the problem:

You can create a node that serves as YOUR ground. Call in GND or whatever. If there are 2xmodels with internal common nodes, I don't think you can isolate between them.

I'd consult snipped-for-privacy@groups.io .

I generally don't use their models, unless they serve as equivalents to more generic devices or do somethging unique that justifies cost of real part use.

RL

Maybe not. I can apply 100 volts to all pins of the LTC4444 and no current flows.

There must be some other reason it won't swing to a V- rail.

I'm making a floating 3-phase AC power supply, with three half-bridges switching between +60 and -60. I have a floating common called N, namely the neutral of a 3-phase wye system. It's another PM alternator simulator.

It's a nuisance to simulate. And very slow.

Something exotic like this mosfet driver is worth simulating with a good model. And it's worth paying more for a part with a good model, which is I guess the point of free LT Spice.

Plus their part selector is horrible--there's no way to search on parameters, or even device type.

Cheers

Phil Hobbs

You'll have the same issues placing digital logic on flying nodes.

RL

More tlines!

Cheers

Phil "Everything's a transmission line anyway" Hobbs

Yes. They are ground referenced for sure.