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LM5117: PSpice simulation failed to converge

Steven Wang
Prodigy 230 points

Part Number: LM5117

Hi, 

I'm designing a Input=48V, output=36V, 0.7A buck circuit with LM5117. I got the schematic design from webench. 

I build the same circuit in PSpice for TI. However, it failed to converge. Auto-converge is enabled. Any idea, please? 

7077.LM5117_25W.zip

  • 0
    TI__Guru 66771 points

    Hello Steven 

    I got an error message when loading DSN file. I am using cadence allegro Ver 17.4.  

    Usually, this type of convergence error is caused by the MOSFET model not by the LM5117 model. Would you please use a voltage-controlled ideal switch rather than MOSFETs and check if the device model works well or not ? 

    -EL