Custom USB 7 port hub PCB dasiy-chain

[StealthRT]

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/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].

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.

 

[Gryd3]

You should be prepared to supply 500mA per USB port, as well as some extra based on the components used in the hub, and some extra to be safe.
A schematic would be helpful, as I am not sure what to suggest other than a 200Watt power supply.
Also, make sure your cabling can cope with the current you plan to shove through it. 200W is far too high for Cat5/6