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TPD4S480: schematic config for pure EPR application

Charles Zhang1
Expert 3520 points

Part Number: TPD4S480
Other Parts Discussed in Thread: TPS26750

Hi Team,

My customer has a pure EPR application, for this kind of case, shall we just tie EPR_EN to VPWR pin, and float the EPR_BLK_G pin (no external MOSFET added)?

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  • 0
    TI__Guru 72611 points

    Hello,

    I am not clear about what is meant by a pure EPR application.  The USBC specification is based upon a 5V VBUS which is the starting point of any negotiation.  Even from PD perspective the transition is 5V-20V-EPR voltage.  Moreover this is not compatible with TPS26750.

    To your point if you always enable EPR (set EPR_EN high) and remove the FET connecting VBUS_LV and VBUS, then the voltage presented to the PD controller VBUS pin will always be divided and the EPR_BLK_G always disabled.

    Regards,
    Chris