• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 1611 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM5007: PSpice Model for inverting topologies

Simon Lukas
Prodigy 60 points
Part Number: LM5007

My aim is to convert +24V to -5V by using the LM5007 as an inverting buck-boost converter. 

To ensure that my circuit works, I simulated it in LTspice.

For the LM5007 I used TI's officially provided PSpice Model.

As shown below, I don't get an output voltage of -5V. Does it have something to do with the overcurrent protection (compare I(L2)) or is it possible that the PSpice-Model of the LM5007 cannot be used for inverting topologies?

 

  • 0
    TI__Guru 72685 points

    Hello

    Unfortunately, the spice model on the web does not support the inverting topology.

    Some of our devices have models that support the inverting topology; that will be stated in the model file name.

    However, the LM5007 can be used in the inverting topology.  I have attached an app note that may be helpful with 

    your design.  Also, the best way to validate your design is to get an EVM for this device and test in the lab.  The

    ordinary EVM can be used to test as an inverting buck-boost, as stated in the app note.

    Thanks

    2474.snva856.pdf

  • 0 in reply to Frank De Stasi
    TI__Guru 72685 points

    Hello

    I will close this post due to inactivity

    Thanks