Colin O'Flynn

Tag: ChipWhisperer-Lite

  • USB Inrush Testing

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    by

    Colin O’Flynn
    in

    The USB spec has limits on the ‘inrush current’, which is designed to prevent you from having 2000uF of capacitance that must be suddenly charged when your board is plugged into the USB port. The limit works out to around 10uF of capacitance . Your board might have much much more – so you’ll have…