• State Resolved
  • Locked Locked
  • Replies 6 replies
  • Subscribers 47 subscribers
  • Views 6434 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.

How to get average value of a waveform in Tina-TI?

Siyu He
Expert 1040 points
Other Parts Discussed in Thread: TPS53316, TINA-TI

Hi,

I am trying to simulate the overall efficiency of TPS53316, the (Vin(t)*Iin(t))/(Vo(t)*Io(t)) is used to calculate efficiency. Since the input current and output voltage have large spikes, the efficiency is hard to get. I am wondering is it possible to have the average value of a waveform? Or do I have to put a low pass filter before the meters?

He, Siyu

  • 0
    Expert 1040 points
    Furthermore, can I just get the average value of a waveform over a certain period of time?
  • 0
    TI__Guru* 93105 points

    Hello Siyu,

    TINA-TI does allow you to calculate the average value of a waveform. Here is the procedure:

    • Run a Transient Analysis
    • Select the waveform by placing your pointer on it and clicking. It should turn red in color.
    • Select the Process tab
    • Select Averages. It should display the Average, Absolute and RMS values of the waveform.

    Here's a screen shot of a waveform and the Process tab:

    Regards, Thomas

    PA - Linear Applications Engineering

  • 0 in reply to Thomas Kuehl
    Expert 1040 points
    Hi Thomas,

    Thanks for you reply. I tried it out, it seems like the function shows the average value of the waveform in the window. If I zoom in/out, it will get me the average of a certain period.

    Thanks,

    He, Siyu
  • 0 in reply to Thomas Kuehl
    Expert 1040 points

    Hi Thomas,

    The following is the problem I have during using the average function. When I was trying to measure the average current of a DC current source, the average function show wrong information(wrong time period, wrong values). The current should be 500mA. However, the average function works fine with other waveforms and the time period is the same as that of x-axis in the window.

    Besides,where can I get such information? I guess there is no content on this in the help document.

  • 0 in reply to Siyu He
    TI__Guru* 93105 points

    Hello He,

    I notice that your start and stop times are 100e48 and -100e48. That is an extremely long time and it is negative time. Maybe there are some default issues you are running into under these conditions.Try making the time interval more realistic and positive. I'd test this but my laptop having TINA is down right now. Also, you can contact DesignSoft with questions about TINA and I find they are helpful. Here is a link to their discussion forum. I would use it for these kinds of questions:

    Although TINA is a great simulator, the "Help" functions can sometimes can leave more desired. Here is a link to some DesignSoft TINA documentation. Keep in mind that TINA-TI is a light version of the DesignSoft's TINA products so not all functions are supported.

    Regards, Thomas

    PA - Linear Applications Engineering

  • 0 in reply to Thomas Kuehl
    Expert 1040 points
    Thanks Thomas,

    I noticed the issue on start time and stop time too. It only occurs at that specific waveform. I'll go to Tina's forum to see what their suggestions are.