Custom USB 7 port hub PCB dasiy-chain

Discussion in 'The Projects Forum' started by StealthRT, Oct 14, 2014.

  1. StealthRT

    Thread Starter Active Member

    Mar 20, 2009
    223
    0
    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?
     
  2. thodoris46

    New Member

    Jan 29, 2013
    10
    0
    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 ?
     
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