DYNAMIC VCONN SWAPPING IN DUAL-POWERED TYPE-C CABLE APPLICATIONS
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Accused Products
Abstract
A semiconductor device for a USB Type-C cable includes a first terminal to couple to a first VCONN line from a first end of the cable, a second terminal to couple to a second VCONN line from the second end of the cable, a charge pump, and a switch circuit coupled to the first terminal and the second terminal. The switch circuit includes a first drain-extended n-type field effect transistor (DENFET) coupled between the first terminal and an internal power supply of the semiconductor device; a first pump switch coupled between the charge pump and a gate of the first DENFET; a second DENFET coupled between the second terminal and the internal power supply; and a second pump switch coupled between the charge pump and a gate of the second DENFET.
27 Citations
40 Claims
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1-20. -20. (canceled)
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21. A semiconductor device for a Universal Serial Bus (USB) Type-C cable, the semiconductor device comprising:
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a first terminal to couple to a first VCONN line from a first end of the USB Type-C cable; a second terminal to couple to a second VCONN line from a second end of the USB Type-C cable; a voltage boost circuit; and a switch circuit coupled to the first terminal and the second terminal, the switch circuit comprising; a first transistor coupled between the first terminal and an internal power supply of the semiconductor device; a first switch coupled between the voltage boost circuit and a control terminal control terminal of the first transistor; a second transistor coupled between the second terminal and the internal power supply; and a second switch coupled between the voltage boost circuit and a control terminal of the second transistor. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A method comprising:
operating a semiconductor device for a Universal Serial Bus (USB) Type-C cable, the semiconductor device comprising a first terminal, a first transistor coupled between the first terminal and an internal power supply, a first switch coupled to a control terminal of the first transistor, and control logic coupled to the first switch, wherein operating the semiconductor device comprises; powering on the first transistor from a voltage, received at the first terminal, falling across a resistive element that is coupled between the first terminal and a control terminal of the first transistor; powering on an internal power supply of the semiconductor device in response to the voltage being passed through the first transistor to the internal power supply; powering up the semiconductor device in response to the powering on the internal power supply; and operating the control logic of the semiconductor device to fully power on the first transistor, and thus enter an active mode of the semiconductor device, in response to the powering up of the semiconductor device. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. A system comprising:
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a first USB Type-C plug at a first end of a USB Type-C cable; a first VCONN line coupled to the first USB Type-C plug; and a first integrated circuit (IC) controller comprising; a first terminal coupled to the first VCONN line; a first transistor coupled between the first terminal and a first internal power supply of the first IC controller; a first switch coupled between a first voltage boost circuit and a control terminal of the first transistor; and first hardware logic coupled to the first switch, to the first voltage boost circuit, and to the first internal power supply, the first hardware logic to; detect a received voltage coming from the first terminal; and turn on the first switch in response to detection of the received voltage from the first terminal, to pass a control voltage from the first voltage boost circuit to a control terminal of the first transistor. - View Dependent Claims (36, 37, 38, 39, 40)
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Specification