Electronics Tutorial - The TL431 Part 2/3 - Making a proper simulation model

#59 In this video I continue working on the TL431; this time I take an existing model and improve on it to get it to behave closer to the real thing. Can you make an even better model? probably, but I think this is a good balance between features and good simulation time.
Here are the other videos in this little mini-series:
Part 1: • Electronics Tutorial -...
Part 2: • Electronics Tutorial -...
Part 3: • Electronics Tutorial -...
My TL431 model:
drive.google.com/file/d/1oR4T...
Datasheets:
www.ti.com/lit/ds/symlink/tl43...
www.onsemi.com/pub/Collateral...
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If you want to support the creation of more and better videos you can at: / feszelectronics
Music:
The Builder by Kevin MacLeod incompetech.com
Creative Commons - Attribution 3.0 Unported - CC BY 3.0
Free Download / Stream: bit.ly/_the-builder
Music promoted by Audio Library • The Builder - Kevin Ma...

[@big_whopper]

Who knew the manufacturer supplied models were so terrible!? Thanks again, so good to know.

[@pavasama]

Wow....you are really an expert...glad i found your channel.. thanks

[@stephanc7192]

Well done
I'm impressed

[@rajanne2947]

Fantastic effort!

[@paulpaulzadeh6172]

very impressive , lift my hat for you , please do more such film , real world circuit and how to make Modell in LTSpice

[@efan1980]

Good Job Sir!

[@andymouse]

Nice !...cheers.

[@archie6586]

woah. that was some pretty awesome lecture..

[@FesZElectronics]

I'm happy you enjoyed it! Thank you!

[@tobiaskosub4957]

Thanks for this insight. I found that the model from Diodes Inc. seems to be even a transistor level model of the circuit, i.e. maybe more accurate, but possibly slower. It runs fast here though.

[@alexloktionoff6833]

Great video! Can you make video for modeling modern bright white LED. 0805/1206?

[@rohitchaturvedi2271]

Here is a model by Zetex which is more accurate than TI and ON semi
[ZHT431]
*ZETEX ZHT431 Spice Model v1.0 Last Revised 22/7/2005
*
*NOTE: This is a simplified Model. Do not rely on this Model for
*validation of circuit stability. It does not accurately replicate
*stability boundary conditions with additional load capacitance.
*Check stability by normal breadboarding techniques.
*
.SUBCKT ZHT431 1 2 3
*Connections Vz Vref Gnd
*Input current
L2 2 12 2E-9
Rin 12 13 Rmod1 20E6
Cin 12 13 1E-12
D1 13 12 Dmod
D2 12 11 Dmod
*Reference voltage, Voltage dependence
Iref 13 21 2.4985E-3
Rref 21 13 Rmod2 1000
G1 21 13 11 13 1.43E-6
*Gain, time constant and clamp voltage
G2 13 31 12 21 0.004
Rt1 31 13 1E8
Ct1 31 32 800E-12
Rt2 32 13 2000
Ct2 31 33 50E-12
Rt3 33 13 5
D3 31 13 Dmod
D4 13 31 Dmod
*Buffer,Output
G3 13 41 13 31 0.22
L1 1 11 2E-9
Rz 11 42 10
D5 42 41 Dmod
D6 13 41 Dmod
D7 13 11 Dmod
Rx 13 23 0.5
L3 3 23 2E-9
Rq 11 13 Rmod3 74E3
*
.MODEL Rmod1 RES (TC1=2.95E-3 TC2=-5E-7)
.MODEL Rmod2 RES (TC1=8.5E-6 TC2=-3.3E-7)
.MODEL Rmod3 RES (TC1=-2.5E-3 TC2=2E-5)
.MODEL Dmod D IS=1E-14 RS=0.1 BV=22 CJO=0.1E-12
.ENDS ZHT431
*
*$
*

[@alexloktionoff6833]

This ZHT431 model is more precise than default OnSemi, but it takes more CPU resources to simulate :(

[@Broxie]

I don't have LT spice and have been trying to get NG spice to run Fesz's model and many others, but not managed it. This model appears to wor in NG spice inside Kicad 7.0.7 ,
Cheers :)

[@michaelpalmgren3606]

When used in a .subckt the "micro" sign must be replaced with "u". Otherwise thanks for a good model.

[@Antyelektronika]

How may I contact with you?

[@FesZElectronics]

My email should be available on the "About" section of the channel. Its [e-mail]