Patents by Inventor Jason W. Lawrence

Jason W. Lawrence 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).

  • Patent number: 11843317
    Abstract: A system may include a boost converter configured to receive an input voltage and boost the input voltage to an output voltage and control circuitry configured to enforce a maximum current limit to limit a current drawn by the boost converter and in response to the output voltage decreasing below the input voltage, dynamically increase the current above the maximum current limit to cause the output voltage to be approximately equal to the input voltage.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: December 12, 2023
    Assignee: Cirrus Logic Inc.
    Inventors: Hasnain Akram, Graeme G. Mackay, Jason W. Lawrence
  • Patent number: 11770064
    Abstract: A system for controlling a current in a power converter configured to generate an output voltage may include a control loop having a plurality of comparators, each comparator having a respective reference voltage to which the output voltage is compared, a digital controller configured to calculate one or more pre-seeded control parameters for the current, and an analog state machine configured to, based on outputs of the plurality of comparators, select control parameters for controlling the current. The control parameters may be selected from the pre-seeded control parameters, control parameters for controlling the current to have a magnitude of zero, and control parameters for controlling the current to have a maximum magnitude.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: September 26, 2023
    Assignee: Cirrus Logic Inc.
    Inventors: Jason W. Lawrence, Eric J. King, Graeme G. MacKay
  • Patent number: 11764595
    Abstract: A system may include a power source, a power converter having an input coupled to the power source and an output for supplying electrical energy to a load, and a control circuit for controlling operation of the power converter. The control circuit may include a first feedback control subsystem configured to monitor an output voltage present at the output of the power converter and regulate the output voltage at or about a predetermined regulated voltage level in a normal mode of operation of the power converter and a second feedback control subsystem configured to monitor an input voltage present between the power source and the input of the power converter and responsive to the input voltage decreasing below a predetermined minimum voltage level, causing the power converter to operate in a protection mode of operation in order to maintain the input voltage at or about the predetermined minimum voltage level.
    Type: Grant
    Filed: April 22, 2021
    Date of Patent: September 19, 2023
    Assignee: Cirrus Logic Inc.
    Inventors: Graeme G. Mackay, Ajit Sharma, Jason W. Lawrence, Eric J. King
  • Patent number: 11735942
    Abstract: A power delivery system may include a power converter configured to electrically couple to a power source and further configured to supply electrical energy to one or more loads electrically coupled to an output of the power converter and control circuitry configured to monitor a first voltage derived from the power source, wherein the first voltage is indicative of a total power demanded by the power converter, and control a limit for a current supplied from the power source to the one or more loads based on comparison of the first voltage to a threshold voltage, wherein the threshold voltage is indicative of a point within a range of operation of the power converter at which the power converter delivers a maximum amount of power to the one or more loads.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: August 22, 2023
    Assignee: Cirrus Logic Inc.
    Inventors: Graeme G. Mackay, Ajit Sharma, Jason W. Lawrence, Lingli Zhang
  • Patent number: 11722054
    Abstract: A power delivery system may include a power converter configured to electrically couple to a power source and further configured to supply electrical energy to one or more loads electrically coupled to an output of the power converter and control circuitry configured to control the power converter in accordance with a control variable.
    Type: Grant
    Filed: October 18, 2022
    Date of Patent: August 8, 2023
    Assignee: Cirrus Logic Inc.
    Inventors: Ajit Sharma, Jason W. Lawrence, Graeme G. Mackay
  • Patent number: 11695337
    Abstract: A system may include a power converter comprising at least one stage having a dual anti-wound inductor having a first winding and a second winding constructed such that its windings generate opposing magnetic fields in its magnetic core and constructed such that a coupling coefficient between the first winding and the second winding is less than approximately 0.95 and a current control subsystem for controlling an electrical current through the dual anti-wound inductor, the current control subsystem configured to minimize a magnitude of a magnetizing electrical current of the dual anti-wound inductor to prevent core saturation of the dual anti-wound inductor and regulate an amount of output electrical current delivered by the power converter to the load in accordance with a reference input signal.
    Type: Grant
    Filed: November 12, 2021
    Date of Patent: July 4, 2023
    Assignee: Cirrus Logic, Inc.
    Inventors: Jason W. Lawrence, John L. Melanson, Eric J. King
  • Publication number: 20230188044
    Abstract: A system for generating a plurality of switch control signals of a multiphase power converter may include a plurality of inputs, each input of the plurality of inputs configured to receive a respective control signal for controlling a respective phase of the multiphase power converter, and a plurality of control paths comprising a control path for each respective control signal, each control path configured to, for its respective control signal, control a switching period of the respective control signal for such control path based on a measure of alignment among the respective control signal for such control path and the other respective control signals of the other control paths.
    Type: Application
    Filed: December 5, 2022
    Publication date: June 15, 2023
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Jason W. LAWRENCE, Graeme G. MACKAY
  • Patent number: 11671018
    Abstract: A method of randomizing inductor current in at least one of a plurality of parallel coupled peak/valley current-controlled power converters may include comparing the inductor current to a threshold to generate a comparison signal, delaying the comparison signal by a plurality of delay amounts to generate a plurality of delayed versions of the comparison signal, and randomly selecting one of the plurality of delayed versions of the comparison signal for controlling the inductor current during one or both of a charging state and a transfer state of the at least one of the plurality of parallel coupled peak/valley current-controlled power converters.
    Type: Grant
    Filed: November 11, 2022
    Date of Patent: June 6, 2023
    Assignee: Cirrus Logic, Inc.
    Inventors: Graeme G. Mackay, Jason W. Lawrence
  • Patent number: 11658559
    Abstract: A system may include a power converter configured to receive an input voltage and generate an output voltage and a controller configured to control operation of the power converter based on a comparison of a current associated with the power converter to a threshold current and control the threshold current as a function of the input voltage.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: May 23, 2023
    Assignee: Cirrus Logic, Inc.
    Inventors: Graeme G. Mackay, Jason W. Lawrence
  • Publication number: 20230074552
    Abstract: A method of randomizing inductor current in at least one of a plurality of parallel coupled peak/valley current-controlled power converters may include comparing the inductor current to a threshold to generate a comparison signal, delaying the comparison signal by a plurality of delay amounts to generate a plurality of delayed versions of the comparison signal, and randomly selecting one of the plurality of delayed versions of the comparison signal for controlling the inductor current during one or both of a charging state and a transfer state of the at least one of the plurality of parallel coupled peak/valley current-controlled power converters.
    Type: Application
    Filed: November 11, 2022
    Publication date: March 9, 2023
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Graeme G. MACKAY, Jason W. LAWRENCE
  • Publication number: 20230067877
    Abstract: A system may include a boost converter configured to receive an input voltage and boost the input voltage to an output voltage and control circuitry configured to enforce a maximum current limit to limit a current drawn by the boost converter and in response to the output voltage decreasing below the input voltage, dynamically increase the current above the maximum current limit to cause the output voltage to be approximately equal to the input voltage.
    Type: Application
    Filed: December 14, 2021
    Publication date: March 2, 2023
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Hasnain AKRAM, Graeme G. MACKAY, Jason W. LAWRENCE
  • Publication number: 20230037944
    Abstract: A power delivery system may include a power converter configured to electrically couple to a power source and further configured to supply electrical energy to one or more loads electrically coupled to an output of the power converter and control circuitry configured to control the power converter in accordance with a control variable.
    Type: Application
    Filed: October 18, 2022
    Publication date: February 9, 2023
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Ajit SHARMA, Jason W. LAWRENCE, Graeme G. MACKAY
  • Publication number: 20230042883
    Abstract: A method for controlling a current associated with a power converter may comprise controlling the current based on at least a peak current threshold level for the current and a valley current threshold level for the current, and further controlling the current based on a duration of time that the power converter spends in a switching state of the power converter.
    Type: Application
    Filed: October 10, 2022
    Publication date: February 9, 2023
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Jason W. LAWRENCE, Graeme G. MACKAY, Sakkarapani BALAGOPAL
  • Patent number: 11552569
    Abstract: A method of randomizing inductor current in at least one of a plurality of parallel coupled peak valley current-controlled power converters may include comparing the inductor current to a threshold to generate a comparison signal, delaying the comparison signal by a plurality of delay amounts to generate a plurality of delayed versions of the comparison signal, and randomly selecting one of the plurality of delayed versions of the comparison signal for controlling the inductor current during one or both of a charging state and a transfer state of the at least one of the plurality of parallel coupled peak/valley current-controlled power converters.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: January 10, 2023
    Assignee: Cirrus Logic, Inc.
    Inventors: Graeme G. Mackay, Jason W. Lawrence
  • Patent number: 11522460
    Abstract: A method for controlling a current associated with a power converter may comprise controlling the current based on at least a peak current threshold level for the current and a valley current threshold level for the current, and further controlling the current based on a duration of time that the power converter spends in a switching state of the power converter.
    Type: Grant
    Filed: January 19, 2021
    Date of Patent: December 6, 2022
    Assignee: Cirrus Logic, Inc.
    Inventors: Jason W. Lawrence, Graeme G. Mackay, Sakkarapani Balagopal
  • Patent number: 11522440
    Abstract: A power delivery system may include a power converter configured to electrically couple to a power source and further configured to supply electrical energy to one or more loads electrically coupled to an output of the power converter and control circuitry configured to control the power converter in accordance with a control variable.
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: December 6, 2022
    Assignee: Cirrus Logic, Inc.
    Inventors: Ajit Sharma, Jason W. Lawrence, Graeme G. Mackay
  • Patent number: 11515707
    Abstract: A power delivery system may include a power converter configured to electrically couple to a power source and further configured to supply electrical energy to one or more loads electrically coupled to an output of the power converter, and control circuitry configured to select a constraint factor from a plurality of different constraint factors based on at least one of an input voltage to the power converter and a power level available to the power converter, and control the power converter in accordance with the constraint factor.
    Type: Grant
    Filed: October 4, 2021
    Date of Patent: November 29, 2022
    Assignee: Cirrus Logic, Inc.
    Inventors: Graeme G. Mackay, Ajit Sharma, Jason W. Lawrence, Eric J. King
  • Patent number: 11476759
    Abstract: A system may include a power converter comprising at least one stage having a dual anti-wound inductor constructed such that its windings generate opposing magnetic fields in its magnetic core and a current control subsystem for controlling an electrical current through the dual anti-wound inductor. The current control subsystem may be configured to minimize a magnitude of a magnetizing electrical current of the dual anti-wound inductor to prevent core saturation of the dual anti-wound inductor and regulate an amount of output electrical current delivered by the power converter to the load in accordance with a reference input signal.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: October 18, 2022
    Assignee: Cirrus Logic, Inc.
    Inventors: Jason W. Lawrence, John L. Melanson, Eric J. King
  • Patent number: 11476766
    Abstract: A system for controlling a current in a power converter may include an outer control loop configured to use an outer set of output voltage thresholds for an output voltage generated by the power converter in order to provide hysteretic control of the current, an inner control loop configured to use an inner set of output voltage thresholds for the output voltage in order to provide continuous control of the current, the inner control loop further configured to measure a time duration required for the output voltage to cross a single pair of two output voltage thresholds of the inner set of output voltage thresholds in order to determine an input-referred estimate of a current load of the power converter and set a peak current threshold and a valley current threshold for the current based on the input-referred estimate of the current load.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: October 18, 2022
    Assignee: Cirrus Logic, Inc.
    Inventors: Jason W. Lawrence, Eric J. King, Graeme G. Mackay, Theodore M. Burk
  • Patent number: 11424682
    Abstract: A system for controlling a current in a power converter may include an outer control loop configured to use an outer set of output voltage thresholds for an output voltage generated by the power converter in order to provide hysteretic control of the current, an inner control loop configured to use an inner set of output voltage thresholds for the output voltage in order to provide continuous control of the current, the inner control loop further configured to measure a time duration required for the output voltage to cross a single pair of two output voltage thresholds of the inner set of output voltage thresholds in order to determine an input-referred estimate of a current load of the power converter and set a peak current threshold and a valley current threshold for the current based on the input-referred estimate of the current load.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: August 23, 2022
    Assignee: Cirrus Logic, Inc.
    Inventors: Jason W. Lawrence, Eric J. King, Graeme G. Mackay, Theodore M. Burk