USB Host Hub Transceivers: Individual Power mode in 28-pin HX2VL part (KA-03324)
The 28-pin package has one PWR# pin and four OVR#[n] pins. When used in Individual mode, the PWR# pin is reserved for Port 1 only. This implies that the PWR# pin will be toggled only if there is an overcurrent condition on Port 1, i.e. if OVR# is toggled and will not be toggled for overcurrent conditions on Port 2, Port 3 and Port 4. So, polyfuses can be used instead of power switches with the OVR# pins to control each VBUS as in the https://www.cypress.com/documentation/development-kitsboards/cy4608-hx2vl-very-low-power-usb-20-comp... CY4608 / https://www.cypress.com/documentation/development-kitsboards/cy4608m-multi-tt-hx2vl-very-low-power-4... CY4608M DVK schematic. More https://community.infineon.com/t5/Knowledge-Base-Articles/HX2-FAQs-KBA224052/ta-p/250104 here.