I am attempting to design a basic 7 port USB hub that will be used in a custom 3D printed case. It will connect to a FPGA device and be powered by a 5V adapter through a barrel plug. I'm stuck on a few things though.
The data sheet puts 100uF caps on each USB port. Other people's designs I found didn't include those. I read somewhere that having caps on the ports could cause problems with "hot swapping". Does anyone have experience with that?
Can I connect the 5V from the barrel jack directly to all the VBUS connections without adding any additional circuitry? I saw examples online where they tied it directly to the input from the micro USB. However, I also found someone who mentioned that this might cause a backfeed of power to the computer (or in this case, the FPGA). Could I just leave the power pin from the micro USB unconnected and rely on power from the barrel jack?
Since this isn't going to be an OTG device, can I leave the "ID" pin from the micro USB jack unconnected or does something need to be done with that?
Thanks in advance for any feedback!