Well, if I ever...!
Thanks! Jeroen Belleman
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6 years ago
LTSpice LED parameters
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6 years ago
Recently poked at a TI SMPS controller model that's a complete clusterfuck of discontinuous IF's, behavioral G sources and as far as I can tell, very little if any modeling of actual pin characteristics.
It's ostensibly a PSPICE model, but I have a sneaking suspicion even PSPICE must have a hard time running it.
I fixed a bunch of those statements with continuous, 3f5 compatible models, but naturally it still doesn't work. Hard to say if it's because I goofed a substitution, overlooked more problem statements, or it's just altogether wrong. All seem equally likely.
Tim
-- Seven Transistor Labs, LLC Electrical Engineering Consultation and Contract Design Website: https://www.seventransistorlabs.com/
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6 years ago
That would be the digital models... but no one's digital models are cross compatible... including Cadence's, PSpice, LTspice, HSpice....
The digital models I've written use standard Spice (Berkeley) language and work anywhere.
Analog models: I've been a user of PSpice user day one... I don't know of an analog model that isn't cross-compatible. ...Jim Thompson
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| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
It's what you learn, after you know it all, that counts.
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6 years ago
Confucius say, "He who uses IF statements within a simulation shall die by IF statements" >:-}
(*) Except for setting up preconditions that don't change during a simulation run. ...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
It's what you learn, after you know it all, that counts.
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6 years ago
Bad use of "IF" statements isn't a peculiarity of PSpice, it's what happens when you allow PhD's just out of school to write models >:-} ...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
It's what you learn, after you know it all, that counts.
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6 years ago
I agree.
Its a total lack of thought as to how a simulator solves equations.
-- Kevin Aylward
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