I'm building a keyboard with the proton c controller, from what I can gather it uses a usb2 port. Now the problem is I want to use an ssd1306 OLED panel and almost per-key RGB (around 70 LEDs total). 1 led uses about 12mA (using the SK6812MINI-E), 70*12=840mA, which is over the limit. If I could add another USB connection it could get around this limit (if my logic isn't flawed). The problem is I'm not sure how to wire it. Right now the led matrix has VDD pins connected to +5V of the proton-c, VSS to GND.
What would be the best way to add another port? I'm open to not even powering it from the PC, but from an outlet.