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Custom USB 7 port hub PCB dasiy-chain

Discussion in 'PCB Layout, Design and Manufacture' started by StealthRT, Oct 15, 2014.

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  1. StealthRT

    StealthRT

    131
    2
    Sep 4, 2010
    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.
     
  2. Gryd3

    Gryd3

    4,098
    875
    Jun 25, 2014
    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
     
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