This question refers to the STUSB4500 reference schematic on page 26 (fig 10) of the datasheet. Will this design prevent current flowing from a secondary power source on Vsnk back to the USB connector if the secondary source's voltage is slightly higher?
In the case where USB power is first applied and a 20V contract established, the STUSB4500 would enable the power path to Vsnk as per usual. Then assume a 20.9V (for example) secondary power source is applied to the Vsnk output (say from a wall adapt...