TPS92692: simulation problem

It seems ok with me with Pspice for TI 2024. Have you changed anything like component in the lib? Can you send me the file which used for simulation? 

Also, please try removing nom_pspti.lib* in configuration files and try if it works. 

2364.Project1.zip

This is my project

Thank You

Fabrizio Borra

I didn't know what happened. However, I copied your schematic to TI model circuit with tps92692 replaced in the schematic and it works. 

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/196/TPS92692_2D00_Q1_5F00_PSPICE_5F00_TRANS-_2D00_-Copy.7z

Now the component has no error. I think that the component in the Texas example is not the same of the one in the library, otherwise I don't explain why now there is no component error.

Anyway I still have simulation problems.

I realized the circuit in the TPS92692_Boost_Design_Calculator with my values.

When I run the simulation 5 errors occurr and only if I flag the "autoconverge" box in the windows that appears and press the "OK & resume simulation" the simulation ends, but the result is absolutely strange: I never approach the target current and the output is oscillating.

The values in the schematic are very similar to the values calculated by the spreadsheet, I can't understand what is going on.

Thank You

Fabrizio Borra

My_TPS92692_Boost_Design_Calculator.xlsx

MY_TPS92692-Q1_PSPICE_TRANS.zip

Let me check and get back to you soon

The boot topology should work with input voltage lower than output voltage.

The problem is that the LED model used has a voltage strongly dependent from the current, that is not a real situation.

I changed the LEDs with Zener diodes to simulate a constant voltage over current and now the simulation works.

The regulation is good with 24V input voltage, but it doesn't work with 14V input voltage.

I used the component values given in the TI boot spreadsheet, but at 14V the regulation is poor.

I don't understand if it is a problem of spice simulation or the TPS92692 is not able to work in this situation.

I tried several different values for components, but nothing changes.

Thank You

Fabrizio Borra

4530.My_TPS92692_Boost_Design_Calculator.xlsx

MY_TPS92692-Q1_PSPICE_TRANS_new.zip