I've designed a PCB that does some I/O and powers the raspberry pi through one of the Pi's usb ports. I want to use the other free USB port for a wifi dongle.
Since I'm backfeeding power will the wifi dongle draw current directly from my board allowing the wifi dongle to draw more current than if I wasn't backfeeding--effectively turning the free usb port on the pi into the equivalent of a port on a powered usb hub.