Hi,

I'm trying to use the LM5160 spice file I downloaded directly from the TI website, but I keep getting an error that says "Trouble parsing initial condition value for V(SS)", where SS is one of the inputs to the LM5160. I tried adding initial conditions to this node, but it didn't fix anything. How do I solve this error? Attached are my schematic and the spice model.

 

Have you tried either the top or bottom options that are checked here?
You can try one or the other.

 

Yup, neither fixed it.

 

Then it would appear there's a problem with the model.
What is SS connected to?
I don't have the symbol for the LM5160 so can't see the connection from your .asc file.

 

I duplicated the setup shown in the datasheet, screenshot attached.

 

Try adding a 1 megohm resistor from SS to ground to see if that helps.

 

It didn't :/

 

Then it would seem there's a problem with the model.
Hard to tell what that might be.

 

The model is a Pspice one, but LTspice throws a lot of errors when running it. I tried editing it, but failed to resolve all the issues.

 

Hi

I've attached a zip file containing a fixed version of the LM5160.LIB file.
A fixed test circuit and a symbol file is also included.

Copy the file to a folder, unzip the file, then open the .asc file with LTspice, then click "run".

Graphics of the circuit and output waveform is also attached.

have fun...

 

Wow thanks so much!!

 

I've attached a zip file containing a fixed version of the LM5160.LIB file.
A fixed test circuit and a symbol file is also included.

So what was wrong with the original file?

 

So what was wrong with the original file?

While LTspice is compatible with PSpice format, the model wasn't written to be completely compatible with other spice programs (including LTspice). As a result, numerous errors regarding "curly brackets" occurred and prevented different parts of the model code from executing.
This is not unusual with models from different vendors and I've run into it numerous times before.
The errors are too numerous to go over. You can perform a file comparison between the old an new files and review the differences.
I will mention though that I modified the file to be compatible with LTspice by making numerous E and G device substitutions for B devices.

Regarding the schematic, I changed the capacitors for capacitors with parasitics, and corrected the coupling, inductances, and DCR of the transformer windings.


eT

 

Okay, thanks for the reply.