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WEBENCH® Tools/LM5118: Increase the simulation time - Load transient

Vigneshwaran Gurusamy
Intellectual 260 points
Part Number: LM5118
Other Parts Discussed in Thread: TINA-TI

Tool/software: WEBENCH® Design Tools

Hi,

    In LM5118 load transient,  the transient could not be simulated due to limitation in simulation time.  In the plot shown below, simulation ended before the step up (rise) of load current. 


Initial delay time was given as 8ms since the output voltage takes more time to settle as seen in the response plot above.

 

Request your help to increase the simulation time.

The public shared file of the design is 

https://webench.ti.com/appinfo/webench/scripts/SDP.cgi?ID=45726C870AF4EBBA

Thanks and Regards

Vignesh

  • 0
    TI__Mastermind 39210 points
    Vignesh,

    We can not randomly increase the sim time for particular simulations as the simulations will timeout on the browser. If you need to customize the sim time beyond what WEBENCH can handle right now, it would be advisable to export this into TINA-TI using the Sim Export feature. This will export the Startup schematic, buy you can change the load appropriately to run the load transient simulation after startup is over.
  • 0 in reply to Nikhil Gupta (Product Folder Models)
    Intellectual 260 points

    Hello Nikhil,

           Thanks for your suggestion.

            But I want to simulate the design within webench as much as possible. So I tried editing the schematic which gives more freedom to modify simulation time.

    The simulation failed due to error shown in the image below.

    Though it shows startup, I modified the schematic for load transient.

    The public shared design is

     https://webench.ti.com/appinfo/webench/scripts/SDP.cgi?ID=9830F2CA0CBA1732

    Do you have any suggestion to overcome this?

    Thanks and Regards

    Vignesh

  • 0 in reply to Vigneshwaran Gurusamy
    TI__Mastermind 39210 points
    Hi Vignesh,

    The Schematic Editor in WEBENCH is a Beta release and we are not making any more updates to it. It would be better to export the WEBENCH design into TINA-TI and simulate it there, or recreate the design using the TINA-TI TSC file on the web. This will offer you most simulation flexibility once you have used WEBENCH to create the design.
  • 0 in reply to Nikhil Gupta (Product Folder Models)
    Intellectual 260 points
    Hi Nikhil,
    Thank you so much for your quick responses.

    Regards
    Vignesh