sg3525 spice model needed !

[thierry38]

Hi,

i'm still searching for a spice model.

sg (lm,uc ) 3524 or 3525

unable to find it,(SGS, TI, NATIONAL do not have one,)

if someone (i saw LUKA using a model with a simulator ) can send or post a subckt file.


thanks.

 

[Andy F]

Hi:

You asked, you get it: http://valvolodin.narod.ru/soft/Mylib.rar For LTSpice.

Regards

 

[thierry38]

Hi Andy F,

thanks a lot for the files/link.

the only working device is tl494.

sg3524 .asc is missing,can not simulate without it.

Thierry.

 

[Andy F]

Hi:

It works, I am using SG3525 model now. Edit sg3525.asy file with a text editor, check this line: SYMATTR SpiceModel ..\sym\Mylib\Mylib.lib, must be: SYMATTR SpiceModel Mylib.lib.
Put Mylib.lib inside lib folder of LTSpice. Restart the application.
You dont need asc. file only put the component inside your schematic. The .asy file edited line points to the sg3525 model inside the library.

Regards.

 

[thierry38]

yes,Handy F you're right.

i've done it ,it's OK

thanks,
i've made a mistake with the unzip folder destination.
now it's working.

good job and good help...

thanks again.

Thierry.

 

[jagrat]

Hi:

You asked, you get it: http://valvolodin.narod.ru/soft/Mylib.rar For LTSpice.

Regards

 

[jagrat]

hi sir , i simulated LTspice model of sg3525 , but i think model has some problem
the output of error amplifier available at compensation terminal of ic is not changing when i am changing input to non inverting terminal

please help me how to get accurate model

 

[9ar9ni]

can some one explain more this:
Edit sg3525.asy file with a text editor, check this line: SYMATTR SpiceModel ..\sym\Mylib\Mylib.lib, must be: SYMATTR SpiceModel Mylib.lib.
Put Mylib.lib inside lib folder of LTSpice. Restart the application.
You dont need asc. file only put the component inside your schematic. The .asy file edited line points to the sg3525 model inside the library.

 

[luobinluo]

Hi,
Does anyone have the spice model of sg3525,
I have tried the link in #2 but it is not availiable now.
Could someone help me,thank you!

 

[planet12]

There's a copy of the SG3525 model referenced above posted in-line at LTspice model for SG2525/SG3525 - All About Circuits Forum

I've used this model quite extensively myself; the only thing I can think of that you'll need to note is that if you're wanting to simulate soft-start (which the model does support), you'll need to set an initial charge on the soft-start capacitor using an IC= parameter, otherwise the DC operating point will be calculated with the capacitor already fully charged.

 

[luobinluo]

There's a copy of the SG3525 model referenced above posted in-line at LTspice model for SG2525/SG3525 - All About Circuits Forum

I've used this model quite extensively myself; the only thing I can think of that you'll need to note is that if you're wanting to simulate soft-start (which the model does support), you'll need to set an initial charge on the soft-start capacitor using an IC= parameter, otherwise the DC operating point will be calculated with the capacitor already fully charged.

It's very helpful,thanks a lot!

 

[chas1]

Hi:

It works, I am using SG3525 model now. Edit sg3525.asy file with a text editor, check this line: SYMATTR SpiceModel ..\sym\Mylib\Mylib.lib, must be: SYMATTR SpiceModel Mylib.lib.
Put Mylib.lib inside lib folder of LTSpice. Restart the application.
You dont need asc. file only put the component inside your schematic. The .asy file edited line points to the sg3525 model inside the library.

Regards.

Where is the error amp,not functioning, does this model have one?

 

[planet12]

Where is the error amp,not functioning, does this model have one?

The model does have an error amplifier, modelled with voltage-controlled current-source "G1" in the subcircuit.

I have used this model extensively, and can confirm the error amplifier works.

I've attached my "remodelling" of the SG3525 as an LTSpice schematic. This produces a netlist identical to the model referenced above, and is a good way to see what's being modelled and how.

 

[kees52]

I need this model for multisim but it do not work there give errors, so I think I need a different spice model.

shame that there is so little models given by companies.

regards

kees

 

[planet12]

@kees52 - load up my SG3525 "remodel" in LTSpice, and you'll be able to see how the model was constructed. From that, you should be able to make an equivalent model in Multisim.

I've never used Multisim, so I can't help you on the specifics of doing this.

 

[kees52]

@kees52 - load up my SG3525 "remodel" in LTSpice, and you'll be able to see how the model was constructed. From that, you should be able to make an equivalent model in Multisim.

I've never used Multisim, so I can't help you on the specifics of doing this.

Thanks

I did already use LTspice, it do better with smps supply. Proteus 8 also tryed however this is very buggy crashing software.

powersim also does oke, it is special for smps, but has little lib.

regards

kees

 

[jjpj75]

Multisim SG3525A

Hi Planet12,

I am a multisim user. I took your advice opened your SG3525A model in LTSpice and am replicating it in Multisim, where I will post for others. I have a couple of questions.

First, D13 not quite sure how you made this. Especially with the 0 breakdown voltage.

Second, the behavioral buffer with complementary output. What exactly is this and how does it work? I cannot find a comparable part in multisim.

Thanks!

 

[eleks]

You asked, you get it: http://valvolodin.narod.ru/soft/Mylib.rar For LTSpice.

It is old library. It isn't updated for a long time. The new library is here http://valvolodin.narod.ru/soft/ValVol.zip

 

[luka]

It is old library. It isn't updated for a long time. The new library is here http://valvolodin.narod.ru/soft/ValVol.zip

And for Infinion FETs you should use their models from.

https://www.infineon.com/cms/en/product/promopages/power-mosfet-simulation-models/

you can put .lib in some folder, in LTSpice add .inc to that folder, place nmos or pmos on schematic, hold CTRL and right click on mosfet and change prefix to X, to use subcircuit from file. Name of mosfet will be the same as in the .lib file (open with text editor). -L0 is level0 for basic simulation.

There are L1, L2 and L3 also, but I didn't get them to work, you change things. L0 works just fine