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TPS51120 original model simulation result is not correct

zhongyong Du
Prodigy 20 points
Other Parts Discussed in Thread: TPS51120

Dear,

I have download the TPS51120 Pspice model,the simulation software is Cadence 16.2.

After finished simulation, the results shows that in D-CAP model,the output of VO2 is not 3.3V, is only near 1.2V. 

Could anybody tell me why? Thanks for your help.


  • 0
    TI__Intellectual 1760 points

    Hello

    The TPS51120 model was developed in Cadence 16.0 and did not encounter the error in simulation that is seen on the16.2 version of Cadence. We are looking into the issue by getting 16.2 and running the simulation. We will get back to you in one week to resolve the issue.

    Thanks

  • 0 in reply to ranjanir
    TI__Intellectual 1760 points

    Hello

    The TPS51120 model in PSPICE 16.2 needs the simulation options to be changed. Please use the following settings under edit simulation profile --> options: RELTOL: 0.001

    VNTOL:1u, ABSTOL:1p, CHGTOL:1p,GMIN:1e-12, ITL1:150, ITL2:10, ITL4: 10 and check the STEPMIN and PREORDER boxes. the simulation should get desired results, VO2 charges to 3.3V.

    Difference in simulation options is being looked into, but this correction of simulation options should help get the outputs needed.

    Thanks

    Ranjani