THVD2450: Spice Model

Hi Bobby, 

Is it possible to have a spice model created?

Thanks. 

Hi Yoshiya,

I'll double check with one of my team mates to see if this is doable, no promises though...

-Bobby

Hi Bobby, 

Thank you for providing the model. Have a request to your teammate.

I tried the model but am getting the following error: Singular matrix: check node u1:txp:driv:drive:raout Iteration No. 2

u1 is the reference designator for the thvd2450 model provided and the names coming afterwards corresponds to the names located in the .lib file, so I think the error lies in the model. 

Can you fix the error in this model?

Thank you.

Hi Yoshiya,

The model works - I just built the library as a macro and ran it:

The model is released "AS IS" and it works on our side so we aren't going to produce another model

- can you please show me how you are setting up your test - the singular matrix error is usually user generated (singular matrices do not exist in the models definition - it is how the circuit physically setup). 

Best,

Parker Dodson

Hi Parker, 

I imported the model to LTSpice. The model says THVD2410, but it's from the THVD2450.lib file that Bobby provided. 

I know TI doesn't support LTSpice, so if it's caused by importing the model into LTSpice then I understand if it can't be helped. 

Thanks. 

I also tried it on TINA TI and tried to replicate your circuit, but I am not getting what you have. 

Hi Yoshiya,

We don't test our models with LTspice since we aren't allowed to (according to LTspice T&C) - so we can't guarantee operation on that simulator (there are slight differences between LTSpice, TINA, and PSpice so while syntax is similar (almost identical) its not directly 1:1) - this model specifically can work with TINA and PSpice (you have to attach a symbol for it to work in pspice but the actual model works)

Can you run an ERC on the circuit to ensure everything is set up correctly- I had an issue today where it looked like DE was connected but it wasn't actually connected and not output was showing up(TINA can have problems with connections at times in my experience).

Also for TINA if you could ensure that:

Max time step = 100ps (you can get strange results other wise since this device is relatively "fast" so 100ps resolution is generally a good thing to have) 

Best,

Parker Dodson

Hi Parker, 

Thank you for the advice! Yes, I did get a warning that a pin wasn't connected. I tried reattaching, rerunning macros, shutting the software down, but couldn't get past it. How did you get resolve the error?

Thank you.

Hi Yoshiya,

That issue isn't coming up when I run the macro editor on TINA and the error is saying something within the model is not working correctly. 

But I found the reason this warning is being triggered - essentially there is dead code inside the model that was used at one time but now it isn't and some of the obsolete code still exists in model- it doesn't do anything but it did create a floating node (which don't actually impact anything from the model perspective). I removed the line that was triggering the issue (basically just deleted line 408 as it was an unused) and I would try running it again

4276.thvd2450.lib

I built a fresh macro from this .lib file to ensure it is okay.  Below is test circuit, ERC screen, Analysis Parameters, and Results. I used a 10MHz square wave (0V to 5V) as the input signal for reference. 

Another solution that may help is shutting down tina - and restarting your computer (sometimes that helps as TINA can slow down and have issues after multiple attempts to run a model - and restarting your computer can help). 

Best,

Parker Dodson