• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 235 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.

UCC28600: TO DETERMINE THE EMI INJECTED BY AN SMPS

sam mungai
Prodigy 10 points
Part Number: UCC28600

Hi

I would like to determine the EMI injected by an SMPS to the Mains supply. The challenge is that, i have 2 inputs, one is the Mains AC supply of 230V and the other one is a control signal voltage pulse. When trying to run AC Analysis I get the error "Only one input is allowed". I have attached the file herein. The AC Mains input is VG1 and the signal control is  VG2. Should i get rid of the control voltage signal and if so,  how will i represent its effects on the SMPS? Kindly guide me on what i can do to determine the EMI as i am still relatively new to TINA.
Kind Regards

SamSMPS.TSC

  • 0
    TI__Expert 8210 points

    Sam

    For the AC signal analysis TINA requires that you only have one AC source.  Your simulation has two different ones.  Typically how you can get around this is to simulate multiple times where the VG2 control signal is a DC point at different values.  The worst case of both simulations will be what the simulator expects the EMI to be.

    Please note that EMI has large dependence on non-ideal parameters on components (such as parasitic capacitor and inductor) along with component placement and layout, so any TINA simulation on EMI will probably have large discrepancies compared to what you will measure when you test the design in the lab.

    Best Regards,

    Eric