New ON-semi BJT. anyone used it?

[pjacobi]

Re: Re: OnSemi models

[...] they measure a typical transistor and plot various curves and input them into the computer which spits out those models. So it is possible that maybe more than one of those parameters don't make sense but in their totality, they do.

Yup, it should work this way, when it works.

But the way the OnSemi guys do it, doesn't work. They may get good for a very limited area of operating parameters, but laughable results in other areas. E.g. the TIP147 model gives Vbe(on) of 300mV. For a Darlington.

Anyway, all this curve fitting business must be manually (or AI) checked for sanity. The standard SPICE BJT model is a physical model, and a lot of parameters have physical meaning. There are deviations for non-idealness, but if some parameter jumps several orders of magnitude from its ideal value, something is wrong.

Regards,
Peter Jacobi