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TPS25741: Power Mux Implementation

K.Yaita
Guru 29690 points
Part Number: TPS25741

Hi Team,

Is it possible to implement supporting 5V, 12V and 20V with Power Mux Implementation?
I think the following supports "5V and 12V" or "5V and 20V".



Do you recommend DC-DC Implementation for the requirement?

Best Regards,
Yaita / Japan disty

  • 0
    TI__Mastermind 28290 points

    Hello Yaita,

    You could follow a similar approach to this set up. If you wan to support more than two voltages, you will need to have a DCDC supply, and control the output voltage using the control pins on the '741. You can control an external MUX using the POL pin as it is either high z or low depending on the orientation of the cable.

    Let me know if this answers your question or not! If so, please click This resolved my issue

  • 0 in reply to Adam Mc Gaffin
    Guru 29690 points

    Hi Adam-san,

    Thank you for your kind reply.
    I understand the following "DC-DC Implementation" is recommended when supporting more than two voltages.



    >You can control an external MUX using the POL pin as it is either high z or low depending on the orientation of the cable.
    I believe you commented POL pin is about MUX control for USB signal not about Power MUX control.
    Is my understanding correct?

    Best Regards,
    Yaita / Japan disty

  • 0 in reply to K.Yaita
    TI__Mastermind 28290 points
    Hello Yaita-san,

    Yes, your understanding is correct. The POL pin is used to control MUX's that are connected to super speed lines. It does not control the power MUX implementation. I thought you were asking how to implement 3 different voltages with a super speed MUX integrated into it. I Did not know you were wanting to use the power mux implementation, but add a third voltage.

    I do not know of a way to support 5V, 12V, and 20V using the power mux implementation, and I would advice against it as I do not know if it is 100% functional.