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TIDA-010054: Modulation Scheme

Alfred Logico
Expert 5570 points

Part Number: TIDA-010054

Tool/software:

Hi Team,

My customer is asking about our TIDA-010054 reference design modulation scheme that we implement for the Dual Active Bridge control. Is it using triangular modulation or trapezoidal modulation or combined?

Thanks! 

BR,

Alfred

  • 0
    TI__Expert 5055 points

    Hi Alfred,

    We use phase shift modulation, which will lead to a trapezoidal current waveform in the lead inductor.
    We have implemented Single phase shift modulation and extended phase shift modulation. There are details in the design guide.

    Best regards,

    Andreas

  • 0 in reply to Andreas Lechner
    TI__Expert 5570 points

    Hi Andreas,

    Thanks for the feedback! I got a follow-up question from customer on this:

    Is there a separate design document or appnote for DAB or only section 2.3 in the design guide is the available DAB design document.?

    In the design guide document, it mentioned a MATLAB script for calculating deltaQ for calculating the Cout of the converter, can we share this with customer?

    Thanks! 

    BR,

    Alfred

  • 0 in reply to Alfred Logico
    TI__Expert 5570 points

    Hi Andreas, 

    Any update on this? Also, got an additional question from our team if there is any study we have done for trapezoidal and triangular modulation? 

    Thanks! 

    BR,

    Alfred

  • 0 in reply to Alfred Logico
    TI__Expert 5055 points

    Hi Alfred,

    Sorry for delayed response. From our side there is no additional documents. 
    I recommend using the simulation deck we provide to explore different modulation schemes.
    We did not do a comparison between phase shift modulation and peak current modulation.

    I do not have the MATLAB script mentioned available since this was calculated for the first revision of the board from a previous team.
    This section is not 100% up to date, since we updated to Film capacitors in the latest revision already. I will update this soon.
    Again a highly recommend using the simulation deck we provide to estimate the needed output capacitance.

    Best regards,

    Andreas