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Energy saving USB receptacle

  • US 10,205,257 B1
  • Filed: 11/28/2017
  • Issued: 02/12/2019
  • Est. Priority Date: 11/28/2017
  • Status: Active Grant
First Claim
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1. A universal serial bus (USB) charging system comprising:

  • a) a charging circuit comprising a power source comprising an enable/disable pin; and

    b) a USB receptacle comprising USB terminals and a first shell side that is physically and/or electrically separated from a second shell side, wherein one of the shell sides is connected to a ground and the other shell side is electrically connected to an on/off logic circuit comprising a pull-up resistor, an inverter, or a transistor, and wherein the on/off logic circuit is electrically connected to the charging circuit comprising the power source and enable/disable pin;

    wherein the charging circuit provides approximately 0 V to the USB terminals and/or consumes less than approximately 9 mW from the power supply when the USB receptacle is unmated with a USB plug; and

    wherein the charging circuit provides approximately 5 V DC to the USB terminals and/or consumes more than approximately 0.25 W from the power supply when a USB plug is mated with the USB receptacle and electrically connects the first shell side and the second shell side.

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