I’m looking at TPD4S014 and thinking that it may work. But, I am confused by the typical application drawings in the datasheet.
Our situation is we want to have a USB host port on our product. It is host-only for this design. I think we can use a standard USB switch with current limit (but normally are not over-voltage tolerant), and then between that and the USB connector, we can use a TPD4S014 to provide the over-voltage and ESD protection.
In the case of a fault, we could have 5V on the internal side applied to VBUSOUT and up to 28V applied to the external side (VBUS), and we would like the TPD4S014 to switch off then and protect our product.
Is figure 12 also valid for a USB Host port? In our case, the battery charger block would be replaced by our 5V power supply in combination with a USB power switch with integral current limit. In the case when there is no fault, current would flow from the VBUSOUT pin to the VBUS pin, which seems like it might be backwards of what was intended. The datasheet really doesn’t talk about Host mode at all as far as I can tell, but isn’t a charger port usually a host port? Figure 16 confuses me even more because of the placement of the current limit switch.
It seems like it will work, but I am so confused by the diagrams that it leaves me with some questions. Can you verify that it will work as I described?
thanks!