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TPD6S300: USB back-powering with TPS65994a

Part Number: TPD6S300

For a configuration using the TPS65994A + TPD6S300 in source-only mode:

We do not want voltages to be fed-back into the system when it is powered down & someone connects to the USB-C port.

We are thinking that if we ground the RPD_G1 / RPD_G2 pins of the TPD6S300 (dead battery resistors not needed) then that would suffice to keep voltages from being driven back into the system. Is this correct?

Do we have any other guidance on how to keep voltages from being back fed through the TPS65994a (such as the LDO 3V3 & LDO 1V5)?