Low-power mode for a USB type-C power delivery controller
AssigneeTexas Instruments Incorporated
InventorsDeric Wayne Waters, Roy Alan Hastings
Life of this patent
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Abstract
In one embodiment, a system includes a power delivery (“PD”) controller in a USB Type-C system that includes a configuration channel (“CC”), PD preamble detector, and a power-usage circuit. The PD controller includes a CC input that receives a PD message. The PD preamble detector is configured to detect a PD message preamble based in part upon a power of a filtered PD message and communicates a wake-up signal to the power-usage circuit in response to detecting a PD message preamble. The power-usage circuit is configured to exit a low-power mode in response to receiving the wake-up signal.
Claims19
A power delivery (PD) controller in a USB Type-C system, the PD controller comprising:
- a power-usage circuit having a power input;
- a first filter having a first filter input and a first filter output, wherein the first filter input is coupled to a configuration (CC) input;
- a second filter having a second filter input and a second filter output, wherein the second filter input is coupled to the first filter output;
- a first comparator having a first comparator output and first and second comparator inputs, wherein the first comparator input is coupled to the second filter output;
- and
- a transistor having a control terminal and a current terminal, wherein the control terminal is coupled to the first comparator output, and the current terminal is coupled to the power input.
A power delivery (PD) controller in a USB Type-C system, the PD controller comprising:
- a power-usage circuit having a power input and a data input;
- a configuration channel (CC) input;
- a first filter having a first filter input and a first filter output, wherein the first filter input is coupled to the CC input;
- a second filter having a second filter input and a second filter output, wherein the second filter input is coupled to the first filter output;
- and
- a first comparator having first and second comparator inputs and a first comparator output, wherein the first comparator input is coupled to the second filter output, and the first comparator output is coupled to the power input of the power-usage circuit;
- and
- a second comparator having third and fourth comparator inputs and a second comparator output, wherein the third comparator input is coupled to the first filter output, and the second comparator output is coupled to the data input of the power-usage circuit.
Dependencies are inferred from the claim text.