Spice Model of NPN Transistor MJE13001

Where can I get the SPICE model of NPN Transistor MJE13001 ?

Thanks.

Hi eie,

I think you're gonna have to write them yourself.
What level does your sim use?

Regards,
Justin

I use LTSpice and I just need a text file of the spice model.

How can I write the spice model since I don't know the design parameters of the MJE13001 ?

Is there any particular reason why you need a model for the particular part, you are most likely to be bound by external factors in the spice simulation anyway, whatever is hung around the transistor will have a significant impact. Any switching transistor model with similar switching characteristics would probably do it. Note that it would need to be a switching transistor, and not a general purpose BJT.
There are a number of vendors (Altium, Intusoft etc.)of spice packages who have parameter extraction from data sheet software built in or as stand alone apps, but I know of no free ones. I have heard bad stories about some of them, so you would need to look through the results if you have access to the software to look for glaring errors, comparing them against a vendor supplied model for a typical part. There are usually a large number of default values.
Cheers,
Richard

Hi richard gabric

LTSpice already provides a number of free Spice models for NPN transistor, however, I would like to have a very precise simulation for a self-oscillating flyback converter, therefore I hope to use the exact spice model of the transistor rather than to pick one randomly.

I believe in this particular application even a very subtle changes of parameters of the spice model could affect the simulation result (frequency, conversion efficiency, ...etc)

Anyway I appreciate very much your suggestions and advices.

To check that out is easy, just substitute a few different switching transistors into the circuit with similar characteristics and see what happens. I suspect that the flyback transformer will have a larger impact, you can't model a transformer without a lot of effort, so you need to play around with the transformer parameters and see what happens as well. It's fun playing with Spice for proof of concept (most of the time), but in the end you have to build your circuit up, the interesting part is seeing how close your simulation came to actual performance and waveforms around the circuit.
Cheers,
Richard

I should also add that there may be quite a spread in transistor parameters, even for parts from the same wafer, that factor alone may be sufficient to negate any effort to characterize your transistor, you will find that doing a Monte Carlo analysis can be very revealing,
cheers,
Richard

I agree with you that there may be quite a spread in transistor parameters even for same transistor produced by same manufacturer.

I have already built the circuit with acceptable performance.
I have also tried to perform simulation using a Spice model of another different transistor, and got around 70% of similarity in the simulation result (waveform, frequency, current consumption..etc), however, my target is over 90% of similarity.

For the transformer, it is not so difficult to establish a transformer model by using the non-linear inductor model which comes along with the LTSpice, I just need to add the coupling coefficient between the inductors and give the magnetic parameters of the core.