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Re: Warning: Multiple definitions of model ...

 
Edited

I presume you meant "It's unlikely that a model "will* produce curves that closely match those in the data sheet"? Of course that's not true. In many cases, you can tweak a model to almost overlay what's in the datasheets. Why not make the model as good as you can? Don't give the "simulations can't be trusted brigade" more ammunition.

And there again, there are many cases where the model is nowhere "close enough", even for diodes. Basic discrete diodes are quite simple to optimise as there are relatively few model parameters. You don't even need LTspice for this, it can easily be done in a spreadsheet using its internal solver. There's nothing very mysterious about the diode equations.

As far as understanding what each parameter does, LTspice gives us the tools to analyse them: just change one and see what it does. Whatever happened to curiosity?

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Regards,
Tony


On 10/07/2023 17:58, John Woodgate wrote:

No doubt you can carry out an optimization, but it requires a deep knowledge of what each of the model's parameters determines, which is far from straightforward.

It's unlikely that a model with produce curves that closely match those in the data sheet, and determining whether a match is 'close enough' also requires deep understanding unless the 'match' is a gross mismatch.
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