Energy saving USB receptacle
Provided herein is technology relating to providing power over a universal serial bus (USB) connection and particularly, but not exclusively, to devices, methods, and systems related to a (USB) technology for reducing energy consumption by a USB receptacle.
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 direct current (DC) to the USB terminals when the USB receptacle is unmated with a USB plug; and wherein the charging circuit provides at least approximately 4.4 V DC to the USB terminals when a USB plug is mated with the USB receptacle and electrically connects the first shell side and the second shell side.
2. The USB charging system of claim 1 , wherein the charging circuit provides between approximately 4.4 V DC and approximately 5.25 V DC to the USB terminals when a USB plug is mated with the USB receptacle and electrically connects the first shell side and the second shell side.
3. The USB charging system of claim 1 , wherein the charging circuit provides approximately 10 V DC to the USB terminals when a USB plug is mated with the USB receptacle and electrically connects the first shell side and the second shell side.
4. The USB charging system of claim 1 , wherein the charging circuit provides approximately 20 V DC to the USB terminals when a USB plug is mated with the USB receptacle and electrically connects the first shell side and the second shell side.
5. The USB charging system of claim 1 , wherein the charging circuit provides approximately 30 V DC to the USB terminals when a USB plug is mated with the USB receptacle and electrically connects the first shell side and the second shell side.
6. The USB charging system of claim 1 , wherein the charging circuit provides approximately 40 V DC to the USB terminals when a USB plug is mated with the USB receptacle and electrically connects the first shell side and the second shell side.
7. The USB charging system of claim 1 , wherein the charging circuit provides a direct current to the USB terminals selected from the group consisting of approximately 50 V DC, approximately 60 V DC, approximately 70 V DC, approximately 80 V DC, approximately 90 V DC, and approximately 100 V DC, when a USB plug is mated with the USB receptacle and electrically connects the first shell side and the second shell side.
8. A method for charging a universal serial bus (USB) device, the method comprising:
a) providing a USB device comprising a USB plug;
b) providing a universal serial bus (USB) charging system comprising:
i) a USB receptacle comprising USB terminals and a first shell side physically and/or electrically separated from a second shell side;
ii) a charging circuit; and
iii) a power supply;
wherein the charging circuit provides approximately 0 V direct current (DC) to the USB terminals when the USB receptacle is unmated with the USB plug; and
c) mating the USB plug to the USB receptacle; wherein when the USB plug is mated to the USB receptacle, the charging circuit provides at least approximately 4.4 V DC to the USB terminals.
9. The method of claim 8 , wherein when the USB plug is mated to the USB receptacle, the charging circuit provides between approximately 4.4 V DC and approximately 5.25 V DC to the USB terminals.
10. The method of claim 8 , wherein when the USB plug is mated to the USB receptacle, the charging circuit provides approximately 10 V DC to the USB terminals.
11. The method of claim 8 , wherein when the USB plug is mated to the USB receptacle, the charging circuit provides approximately 20 V DC to the USB terminals.
12. The method of claim 8 , wherein when the USB plug is mated to the USB receptacle, the charging circuit provides approximately 30 V DC to the USB terminals.
13. The method of claim 8 , wherein when the USB plug is mated to the USB receptacle, the charging circuit provides approximately 40 V DC to the USB terminals.
14. The method of claim 8 , wherein when the USB plug is mated to the USB receptacle, the charging circuit provides a direct current to the USB terminals selected from the group consisting of approximately 50 V DC, approximately 60 V DC, approximately 70 V DC, approximately 80 V DC, approximately 90 V DC, and approximately 100 V DC to the USB terminals.