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Original question:

TMS320F28379D: UCD7138

TMS320F28379D: UCD7138

robin gangopadhya18
Mastermind 6050 points
Part Number: TMS320F28379D
Other Parts Discussed in Thread: TIDM-1001, UCD7138

Pl see attached a pdf file that shows how we plan to implement the  Interleaved  PS-LLC using TMS320F28379D  as described in TIDM-1001 document

These differences are meant to make the design suitable for our application in very tight packaging constraints with more restrained heat management. So we are striving to achieve higher efficiencies. This also forces us to rethink resistive high current sensing as well.

Will appreciate your expert comments.

thnx

robin

C2K_LLC_approach_5v80amp.pdf

  • 0
    TI__Genius 15555 points

    Hi Robin,

    Just want to let you know I am looking into it and since there are quite amount of questions, I will get back to you soon.

    Regards,

    Chen

  • 0 in reply to Chen Jiang ti
    Mastermind 6050 points

    Appreciate very much, Chen !

    I thought of putting all questions together instead of piece-meal.

    Yet, I had more to ask/clarify...as you can see in the posts.

    Meanwhile, I am going ahead with some of the approaches as I mentioned in the Questions..pending your answers......I can email the current state of the schematic to you but cannot post it here.

    Let me know. That might speed up your time to answer...

    robin

  • 0 in reply to robin gangopadhya18
    TI__Genius 15555 points

    For question 1:

    Does DNP mean the DCT outputs of UCD7138 are not connected to the processor? What is then “R?” an open? How does processor give out correct SR timing for 8 such sync rectifier timing without DTC?

    DNP means "do not populate". This pin is not required to connect to the processor because the output pin already has the delay automatically added to the original PWM input to do the SR. For more information, you can refer to figure 24 of the UCD7138 datasheet. I also check the TIDM-1001 code and the DTC signal is not used in the code.

    Chen

  • 0 in reply to robin gangopadhya18
    TI__Genius 15555 points

    Sorry for the late reply.

    1. I don't see any issue by using the same code for your application.

    2. Will there be issues with this differential signal to voltage control ADC input?

    As long as you use the differential mode of ADC, that should be fine.

    I cannot answer the other two questions because it is not related to our reference design. Thanks.

    Regards,

    Chen