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CCS:About the two-phase interleaved boost of the TMDSHVMPPTKIT kit

Other Parts Discussed in Thread: TMDSHVMPPTKIT

Tool/software: Code Composer Studio

About the two-phase interleaved boost of the TMDSHVMPPTKIT kit


I purchased the TMDSHVMPPTKIT kit and wrote the corresponding program through JTAG. The DC300V voltage was input at the input of the TMDSHVMPPTKIT kit, but the two-phase interleaved boost has no PWM waveform output, and the PWM signal of the half-bridge resonant LLC isolation stage has an output, but

The duty cycle is 10%. I don't know where the problem is. All hardware settings are fine, and Gui_Operation_mode is also set to 1, but the two-phase interleaved boost still has no PWM waveform output.

  • You mentioned you wrote the program through JTAG. You don't need to do that. This hardware comes with pre-programmed (code loaded in flash) control card.
    Please follow the instructions in the quick start guide (that comes with this design) to power up the board.

    Shamim
  • Dear Shamim Choudhury

       I have done exactly the instructions in the quick start guide. Also correct for the board power supply, but the BOOST part still has no pwm waveform output, although the LLC part has PWM wave output, but the duty cycle of the PWM wave is wrong, I have been working on this TMDSHVMPPTKIT kit for more than a week, the problem Still in place. Excuse me, Shamim Choudhury, where is my problem? Is there a problem with this code?

  • Hi, Deagle

    Have you changed anything in the original code? The original code should be fine.
    When did you start to see this problem? In build 1? Can you check PWM registers during your initial debugging process?
    Also since you mentioned the PWM signal to LLC converter is ok, so it seems like PWM3/4 are ok while PWM1/2 are not. Can you compare the registers value in the expression window to find if there is anything wrong in the settings.
    Thanks.

    Regards,
    Chen
  • Hi Deagle,

    Do you have any updates on this issue? Has this been resolved? Thanks.

    Regards,
    Chen
  • Hey, Chen Jiang ti, hello!

        Thank you very much for your reply. I have been testing the source code of the TMDSHVMPPTKIT kit for the past few days. I have not modified all the code. I finally found that there is a problem with the settings. In the case of build 3, set Operation_mode = 1 at the same time; and Start_DC_DC = 1; There is PWM waveform output, otherwise there will be no waveform output!
        But now the biggest problem is that PWM1 and PWM2 have no soft-start function, which makes it very easy to blow up the power tube! Can Chen Jiang ti mention that PWM1 and PWM2 can be changed to soft start function like PWM3 and PWM4? How to modify this code? Trouble Chen Jiang ti can give me answers in busy schedule, thank you!
  • Hi deagle,

    It should be similar the soft-start of LLC, also you can take a look at the ILPFC project(with the boost stage) which has the soft-start implemented.

    Regards,
    Chen
  • Hello! Chen Jiangti,

    thank you very much for Chen Jiangti's reply! You've completely solved my problem.