conversion of pspice to ltspice

Discussion in 'General Electronics Chat' started by grad-student, Nov 19, 2014.

  1. grad-student

    Thread Starter New Member

    Nov 19, 2014
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    Hello,
    I am working on a project where I need to use power MOSFET. I downloaded MOSFET library which is in PSpice but I want it work in LTspice instead. Can anybody help with conversion of PSpice to LTspice?
     
  2. MikeML

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    Post the pspice text model, and I will take a hack at it...
     
  3. grad-student

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    Nov 19, 2014
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  4. grad-student

    Thread Starter New Member

    Nov 19, 2014
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    please check
     
  5. MikeML

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    No attachment...
     
  6. grad-student

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    Nov 19, 2014
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  7. grad-student

    Thread Starter New Member

    Nov 19, 2014
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    hey MikeML,
    The folder contains libraries of many transistors. I am only interested in one of these:

    IPP65R190E6_L3
    IPP65R280E6_L3
    IPP65R380E6_L3
    IPP65R600E6_L3
     
  8. MikeML

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    1. Unzip the file you provided into the subdirectory where you creating your LTSpice schematic. It contains two files. Rename the one that ends in .lib to be Infineon.lib (to shorten its name). Delete the app note file (or not).

    2. to verify that LTSpice can find the lib file, do file/open/Infineon.lib. It should open in a text window inside LTSpice.

    3. Get the symbol file below NMOSsub.asy and save it in the subdirectory where you are creating your LTSpice schematic.

    4. Create a schematic. When you get to where you want to insert one of the Infineon FETs, insert an instance of the NMOSsub.asy (not nmos). To do this, click on the little nand gate icon, and change the TOP DIRECTORY pull-down to point to your local subdirectory, and then select the NMOSsub.asy from the list of available symbols. Remember to change it back if looking for a standard part.

    5. Now change the string subckt on the NMOS symbol to IPP65R190E6_L3 (or any of the valid .subckt names in the lib file.)

    6. Now add this directive to the schematic: .include .\infineon.lib

    7. You should have a simulatable circuit.

    I have included a small test file you can unzip into a clean subdirectory which you can look at.
     
  9. grad-student

    Thread Starter New Member

    Nov 19, 2014
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    I worked on it and I used L3 model and its working really well. Thank you so much for your help.
     
  10. Fountain

    New Member

    Oct 14, 2015
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    Hi

    I need to convert UCC28711 from Pspice to LTspice. I am trying to follow steps described above, but not sure about step 3 i.e. where to get symbol file.

    Any help is appreciated. Thanks
     
  11. MikeML

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    Post the UCC28711 model text file. I need to see the pin order.
     
  12. Fountain

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    Oct 14, 2015
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    Thanks MikeML.

    Attached. And here is the link where I downloaded from, just in case.
     
  13. Fountain

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    Oct 14, 2015
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  14. MikeML

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    I just opened the .lib file, and it is an encrypted file. The #%%$## dickheads at TI have encrypted all of their Spice models in such a way that they force you to use their crappy Webbench application..., which in turn is nothing but a marketing ploy to get you to buy a PSpice license.

    I for one am boycotting TI parts in my designs because of this...
     
    Last edited: Oct 15, 2015
  15. Fountain

    New Member

    Oct 14, 2015
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    Hi MikeML

    I asked TI for an unencrypted model. Their reply: "only per our distributors' request and assessing their customers' projects". Not very helpful as I need it fast.
    The irony is the transformer designed to work with this chip, the spice model is available in LTspice and the chip spice model only in Pspice. The reason I wanted to simulate is because my flyback SMPS prototype is not working because there's no voltage on the auxiliary to provide energy to the VDD to switch the IC on. Any idea as to why this is?

    Thanks for your help.
     
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