Patents by Inventor Kannappan Rajaraman

Kannappan Rajaraman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240126354
    Abstract: Systems, apparatus, articles of manufacture, and methods are disclosed for power budgeting for computer peripherals with electronic devices. An example apparatus to budget power in an electronic device includes interface circuitry; machine readable instructions; and programmable circuitry to at least one of instantiate or execute the machine readable instructions to: detect a Type-C event associated with a computer peripheral; write a power level offset based on an assumed power contract for the computer peripheral during debounce time; obtain an actual power contract for the computer peripheral; and adjust the power level offset based on the actual power contract.
    Type: Application
    Filed: December 28, 2023
    Publication date: April 18, 2024
    Inventors: Kunal Shah, Prabhakar Subrahmanyam, Venkataramani Gopalakrishnan, Chuen Ming Tan, Venkataramana Kotakonda, Mitsu Shah, Kannappan Rajaraman, Yi Jen Huang, Dmitriy Berchanskiy, Swathi Nukala
  • Publication number: 20230385218
    Abstract: Embodiments herein relate to a universal serial bus (USB) host system that is configured to perform port orientation identification and/or configuration lane identification. Specifically, the USB host system may include a USB Type-C port configured to communicate in accordance with the USB 3.2 protocol. The described identifications may be performed without the use of a power delivery (PD) and/or Type-C port controller (TCPC) module. Other embodiments may be described and claimed.
    Type: Application
    Filed: May 27, 2022
    Publication date: November 30, 2023
    Inventors: Udaya Natarajan, Kannappan Rajaraman, Huimin Chen
  • Publication number: 20230305615
    Abstract: Techniques and mechanisms for opportunistically charging a battery with a programmable power adapter. In an embodiment, a charger circuit is to be coupled between the programmable power adapter and a load circuit which is coupled to the battery. Bypass circuitry is coupled to selectively enable a bypassing of the charger circuit. Based on a state of charge of the battery, a controller circuit identifies a power delivery scheme which includes both an operational mode of the programmable power adapter, and an activation state of the switch circuit. The controller configures the identified power delivery scheme by signaling that the programmable power adapter is to be transitioned to the operational mode. In another embodiment, the operational mode is based on communications which are compatible with a Universal Serial Bus (USB) standard protocol.
    Type: Application
    Filed: March 25, 2022
    Publication date: September 28, 2023
    Applicant: Intel Corporation
    Inventors: Udaya Natarajan, Kannappan Rajaraman
  • Patent number: 11705750
    Abstract: A power sequence in a power-delivery (PD) mechanism (interaction between host system components and a charger) and a firmware sequence during power contract negotiation reduces the host system power consumption at or below the pSnkStdby power limit to improve user experience and battery life. The power sequence uses USB Type-C PD protocol and timing specification to implement a synchronous trigger or interrupt and interface mechanism. The synchronous trigger or interrupt and interface mechanism between a PD controller and an embedded controller firmware controls the power consumption dynamically during the boot flow sequence to be less than or equal to pSnkStdby power limit while implementing a predictable boot sequence and optimizing boot time. The power negotiating sequence is also applicable when a source (e.g., a charger) is connected to a SoC host system which is in active state (e.g., S0) and when there is an indication of low battery capacity.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: July 18, 2023
    Assignee: Intel Corporation
    Inventors: Udaya Natarajan, Kannappan Rajaraman, Venkat Jayaraman
  • Publication number: 20230111694
    Abstract: In an embodiment, a host system for selecting a power supply includes a processor, a bus interface to connect to a peripheral device, and a power controller. The power controller may be to: determine whether the processor has entered a reduced power mode; determine, via one or more bus messages, whether charging is to be performed for a battery of the peripheral device; and in response to a determination that the processor has entered the reduced power mode and that charging is not to be performed for the battery of the peripheral device, switch from a first power supply to a second power supply as an active power source of the host system. Other embodiments are described and claimed.
    Type: Application
    Filed: September 23, 2021
    Publication date: April 13, 2023
    Inventors: Aruni P. Nelson, Udaya Natarajan, Kannappan Rajaraman
  • Patent number: 11616373
    Abstract: A software and hardware architecture framework utilize the specifications of Universal Serial Bus (USB) Type-C and Power Deliver (PD) to provide fine grain throttling of a processor (e.g., system-on-chip (SoC)). Based on an external charger connection or disconnection, a low latency fine grain power budget loss or gain indication to the processor is delivered. The mechanism of various embodiments is also applicable to connection or disconnection of VBUS powered peripheral devices to the system. The net power loss or gain available to the SoC and System is proportionally used to scale the processor throttling.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: March 28, 2023
    Assignee: Intel Corporation
    Inventors: Udaya Shankar Natarajan, Kannappan Rajaraman
  • Publication number: 20220037899
    Abstract: A software and hardware architecture framework utilize the specifications of Universal Serial Bus (USB) Type-C and Power Deliver (PD) to provide fine grain throttling of a processor (e.g., system-on-chip (SoC)). Based on an external charger connection or disconnection, a low latency fine grain power budget loss or gain indication to the processor is delivered. The mechanism of various embodiments is also applicable to connection or disconnection of VBUS powered peripheral devices to the system. The net power loss or gain available to the SoC and System is proportionally used to scale the processor throttling.
    Type: Application
    Filed: July 30, 2020
    Publication date: February 3, 2022
    Applicant: Intel Corporation
    Inventors: Udaya Shankar Natarajan, Kannappan Rajaraman
  • Publication number: 20210408803
    Abstract: A power sequence in a power-delivery (PD) mechanism (interaction between host system components and a charger) and a firmware sequence during power contract negotiation reduces the host system power consumption at or below the pSnkStdby power limit to improve user experience and battery life. The power sequence uses USB Type-C PD protocol and timing specification to implement a synchronous trigger or interrupt and interface mechanism. The synchronous trigger or interrupt and interface mechanism between a PD controller and an embedded controller firmware controls the power consumption dynamically during the boot flow sequence to be less than or equal to pSnkStdby power limit while implementing a predictable boot sequence and optimizing boot time. The power negotiating sequence is also applicable when a source (e.g., a charger) is connected to a SoC host system which is in active state (e.g., S0) and when there is an indication of low battery capacity.
    Type: Application
    Filed: December 17, 2020
    Publication date: December 30, 2021
    Applicant: Intel Corporation
    Inventors: Udaya Natarajan, Kannappan Rajaraman, Venkat Jayaraman
  • Publication number: 20210208668
    Abstract: A power saving apparatus and method for a host system to proactively decide to save power and increase battery life when bus powered peripheral devices are connected to the System's Type-C ports. The Host (or Host System) decides if a Bus Powered Device (BPD), hub or a peripheral device requires application services, or a device-initiated wake based on wake policies of a respective Universal Serial Bus (USB) 3.2, Thunderbolt 3 (TBT3), USB4, Display Port (DP) Protocol. Thereafter, the Host decides based on S0, Low Power System standby entry—wake time latency requirement along with Type-C IO Protocol policies, to trigger the system power delivery (PD) Controller to remove power to the BPD. To save power, the Host System Wake logic power partition is also powered off.
    Type: Application
    Filed: March 16, 2021
    Publication date: July 8, 2021
    Applicant: Intel Corporation
    Inventors: Udaya Natarajan, Kannappan Rajaraman