US 12,222,790 B2 · Power management for Universal Serial Bus (USB) type-C port

Abstract

A power management scheme for USB systems. For Mobile systems that has re-timer, a handshake is used between power delivery (PD) controller, re-timer and embedded controller (EC) so that the PD controller can end higher wattage power contract on USB-C connector after TBT/USB4 link is in low power (CLd/U3) and during system low power transition allowing Dynamic Platform and Thermal Framework (DPTF) framework to boost CPU performance and enhance battery capacity respectively. The same solution can be extended to desktop segment to allow PD controller to lower the USB-C power contract with connected devices before switching to standby rail. For mobile systems that are without re-timer, a handshake is used between BIOS, PD controller and EC so that PD controller can end higher wattage power contract on USB-C connector after TBT/USB4 link is in low power (CLd/U3) and during system low power transition.

Claims19

Dependent claims

An apparatus comprising:

a power delivery controller;
and
a re-timer coupled to the power delivery controller, wherein the power delivery controller is coupled to a device connector which is configured to be coupled to power source device or a power sink device, wherein the re-timer generates an interrupt to the power delivery controller when a link between the device connector and the power source device or the power sink device is in low power state with disabled wake, wherein in response to the interrupt, the power delivery controller is to scale down a power contract with the power sink device to allow the power sink device to draw a suspend current.

Dependencies are inferred from the claim text.

Power management for Universal Serial Bus (USB) type-C port

Life of this patent

Power management for Universal Serial Bus (USB) type-C port

Life of this patent

Abstract

Claims19