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Typo alert.??I wrote: Andy

I just uploaded "BUK7S1R0-40H with 2019 model.zip" to the Temp folder. Andy

Since the model is a .SUBCKT with 3 pins, and the symbol has 3 pins, I conclude that the most likely cause of the problem is user-error (cockpit error).? You did something wrong.? Try again. Andy

FYI, by looking at a diode model, you can't tell how it performs.? You would need to do several simulations of each and every diode model, to extract the data you are looking for. Much, MUCH easier

As a first step, did you try searching through all the diode models that come with LTspice itself? It has them all collected together already, in a format that makes it simple to search for

Thank you very much, that's what I was afraid of.

No, you can't use it. If TI will not supply an unencrypted model (probably because the device uses a secret trick), you can get TI's PSPICE for free, and run the simulation in that.? The chances of

Hello, I would like to use the LMR51606 in LTSpice. I only found an encrypted PSpice library on TI. I've already uploaded the file (LMR51606.zip). Unfortunately, I can't import the file into LTSpice.

Your transformer model is not correct. You have also set a very high voltage for such a small core. Here is my transformer model. See the file NonLinearTransformer_pulse_AB2.zip in the TEMP folder.

If you do a search of the Files area of this group's site with the term "diode model", you will get 610 hits. Not all of them are actual diode models, but some of them are. If you are more specific

thanks for the reply. since ltspice community has built by now a massive list of diodes, and similarly with components that include the ones provided by ltspice itself, i think we must have a software

That error message sometimes appears when there is quite a different problem. It probably doesn't happen often enough for tracking down the reason and fixing it to be worthwhile. Examine your .ASC

Many manufacturers have diode equivalency charts, or part selector guides, on their websites.? ?You can parameterize your searches and come up with similar parts according to some criterion. Have

If you want a definitive diagnosis, you would have to upload your schematic together with all symbols and models in a zip to Files > Temp. -- Regards, Tony

I'm confused. Why do you want to find an alternate diode model model that is similar to one that you already have? Or, did you mean an alternate diode? Perhaps if you could clarify, preferably by

hello members, i was looking for a tool which can provide alternate diode models that match approximately to a given diode model. unfortunately, i could not find any website or software. it would

I also tried using older LEVEL = 3? NMOS model by nexperia, with 3 pins. But no luck there either. I get Port(pin) count mismatch between the definition of subcircuit "buk7s1r0-40h" and instance

Andy, You are correct, of course.? The original LM321 (as well as the LM121 and LM221) is described as a "Precision Preamplifier" in the 1976 to 1982 linear data books, as far as I've been able to

Yup. It effectively competes, having performance that chopper stabilized amps could achieve. Ouch! It keeps us on our toes.? :-) Andy

That old LM121 is basically just a differential pair. Plus some other details of course. But no voltage gain or output stage as would be found in an opamp. -- http://davesrocketworks.com David Schultz