TPS22915: "divide by zero, Divide" error when simulating a circuit using PSPIE-for-TI

Hi Shreyas,

Thanks so much for the reply.

The schematic is pasted below. I realized that there won't be any issue with the simulation if the 16 Ohm resistor (in the red circle) is removed. However, with the  16 Ohm resistor in place, I was getting the error stated in my original post. Any insight on why this might happen?

Hi Shreyas,

Thanks. The current source is actually 3 mA DC. Do you think this might be an issue?

I do need to use a current source to model the behavior of the system that I am trying to simulate though. Using a voltage source won't reflect the reality.

Thanks!

Hi Shreyas,

Thanks for the information. Once the switch is turned on, the resistive load on the other side of the switch is expected to draw more current than the current source is providing. As a result, it is expected to see the load switch's input voltage go up and down.

I tried to post this ticket in the "Simulation, hardware & system design tools forum" section but once I entered the part number the system automatically selected this section for me. Would it be possible for me to post this in the simulation tool section? Or would you be able to help transfer this post to that section? Thanks so much!

Hi You,

I have moved this to the PSPICE for TI forum.

Hi You,

would you please share the project with us?

Thanks,
JC

Thanks Shreyas.

Hi JC, please see attached. Please let me know if you can open it. Thanks a lot!TestProj.zip

Hi You,

I had to create a sim profile as there isn't one. Other than that, everything is OK and I did get the error with that sim profile I created.

The developers will be looking at this and if there's anything else needed from you, I'll let you know.

Thanks,
JC

Hi JC, 

Thanks so much. I look forward to hearing from you.

Best regards,

You

Hi You,

Thanks for the file. We'll take a look and get back to you.

Regards,

JC

Hi You,

Would you please turn on the "skip initial transient bias point" in your sim profile and let us know how it goes?

Thanks,
JC

Hi JC,

Thanks for the reply. I just tried but the simulator still gave me the same divide-by-zero error.

.

Hi You,

Maybe our sim profiles are different. Please take a look at this one to see if the error comes up:

TestProj-2021-05-21T21-29.zip

Thanks,
JC

Hi JC,

Thanks. If you change the simulation duration to 30 second you'd see the simulation aborted due to divide-by-zero error at 11 second.

Thanks,

You

Hi You,

Thanks. We'll try that.

Regards,
JC

Hi You,

Would you please try the attached project to see if it works better?

TestProj_RnD.zip

Thanks,
JC

Hi JC,

Thanks. I've tried the attached file but still saw two errors.

Error1: saw this error during the launch of the project file. Picture attached. 

Error2: error during simulation. Picture attached.

It seems to be related to a model file used in the schematic, but I am not sure how to configure it correctly. Any suggestions?

Thanks!

You

Hi You,

Sorry about that. I am checking the project.

Thanks,
JC

Hi You,

Please increase the value for DIODERS to 50 and try your simulation again. It seems that there are some ideal device models that contributed to the problem:

Thanks,
JC

Hi JC,

Thanks! Looks like updating this parameter solves my issue. 

It's my understanding that DIODER refers to "Diode Ohmic Resistance". However there is no diode in my schematic. Could you please help explain why this would make a difference? Is this affecting some internal diode inside the TPS22915 model? Thanks a lot! --You

Hi You,

Yes this option applies to all diodes in the circuit being simulated.

Thanks,
JC