Hey all I had a schematic laid out for a custom USB 2.0 7 port hub I needed to create for a project of mine. It currently uses Ethernet RJ45 sockets to provide power and data to each hub (2 Ethernet ports for upstream and downstream USB) along with the needed resisters/regulators (to drop it down to 5vdc/3.3vdc)/etc.

Though I have an issue and that's why I wanted to post on this forum and see if it can be taken care of before I send the Eagle & gerber files to the company to get printed and populated.

The usb hub chip I am using is the microchip USB2517 [http://www.microchip.com/wwwproducts/Devices.aspx?product=USB2517]. And the datasheet is here [ http://ww1.microchip.com/downloads/en/DeviceDoc/2517.pdf ].

Would it be possible, running a power supply of 12vdc 160W 10a [ http://www.12vadapters.com/adapter/power-supply/12v/10-amp-10a.html ], to power the hubs? Keep in mind not all of the 6 USB ports will be used per the 12 or so hubs I will have daisy chained. I would guess that 18 to 35 usb ports out of a possible 72 usb ports will be used. If it's not possible then what would need to be in place for that to happen?

 

I didn't understand the question..
Are you regulating 12 V to 5V with 10 A flowing ??
Daisy chain devices share current.you have a 10 A supply. How many divices you want to power ?