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WEBENCH® Tools/TPS62140: Issue while simulating in TINA software

Rewati Kotgire
Prodigy 10 points
Part Number: TPS62140

Tool/software: WEBENCH® Design Tools

Hello,

I am using TPS62140 buck converter in one of my designs. You can check snap of design as below. All the connections are as mentioned in the datasheet. I simulated the design in Webench, I am getting the results. But when I simulate the same design on TINA, I am not getting the desired results. The output voltage is way less than the desired voltage. Please check below snap from the schematic in TINA.

I performed DV analysis in TINA and results I am getting are much below than desired. Please check below snap.

Desired voltage is 2.5V as per datasheet, whereas I am getting just 33mV. Please help me to resolve this issue.

Regards,

Rewati

  • 0
    TI__Guru**** 191445 points

    Rewati,

    Your output capacitance is much too large.  22 uf is the recommended value and you have 3710 uF.  Also, please perform the "Transient Analysis".  Table of DC Rssults at t=0 will not give you an output voltage as the converter has not started up yet.