Patents by Inventor Dominique ROMEO

Dominique ROMEO 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: 20220312568
    Abstract: Detecting faults in circuits driving average-current loads. At least one example is a method comprising: conducting, during a first half-period of a drive cycle, a first current through a first FET to an inductor and an average-current load (e.g., an LED); sensing, during the first half-period, a signal indicative of average current through the first FET; and then conducting, during a second half-period of the drive cycle, a second current through a second FET to the inductor and the average-current load; sensing, during the second half-period, a signal indicative of average current through the second FET; and asserting a fault signal if the signal indicative of average current through the second FET indicates an average current supplied to the average-current load is outside a predetermined range of values.
    Type: Application
    Filed: March 15, 2022
    Publication date: September 29, 2022
    Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Pascal TOURNIER, Sebastien BRAS, Dominique ROMEO
  • Publication number: 20220312561
    Abstract: Average inductor current control with open- and closed-loop regulation. One example is a method of operating an LED module, the method comprising: controlling, by an on-off controller, a high-side FET and a low-side FET to create a plurality of charge modes and discharge modes of an inductor coupled to an LED of the LED module, each charge mode ends at a peak current indicated by a signal applied to a peak-current input of the on-off controller; driving, by an open-loop regulator, a zenith-current signal to the peak-current input, the open-loop regulator calculates the zenith-current signal for each charge mode without using a feedback signal indicative of current through the LED; and driving, by a closed-loop regulator, a peak-current signal to the peak-current input, the closed-loop regulator calculates the peak-current signal for each charge mode based on the feedback signal indicative of current through the LED.
    Type: Application
    Filed: March 15, 2022
    Publication date: September 29, 2022
    Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Damien BRUVIER, Dominique ROMEO
  • Publication number: 20220217823
    Abstract: Average inductor current regulation for power converters. At least one example embodiment is a method including: sampling a drain-to-source voltage of a power transistor during a switching period of the driving LED, the sampling creates a sampled drain-to-source voltage; creating an error signal based on a difference between the sampled drain-to-source voltage and a setpoint drain-to-source voltage, the setpoint drain-to-source voltage proportional to a setpoint average current through the LED; and changing an on-time of a charge mode of an inductor based on the error signal.
    Type: Application
    Filed: January 6, 2021
    Publication date: July 7, 2022
    Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Dominique ROMEO
  • Patent number: 11005365
    Abstract: In one form, a control circuit is adapted for use with a power converter having an inductor and a switch switching the inductor in response to a switching signal to regulate an output voltage of the power converter. The control circuit includes a slow feedback path, a fast feedback path, an integrator, a comparator, and a drive circuit. The slow feedback path provides a ripple signal in response to an average value of the output voltage. The fast feedback path provides a feedback signal in response to the output voltage. The integrator provides an error signal in response to a sum of the feedback signal and the ripple signal. The comparator provides a comparison output signal in response to a comparison of the error signal and a threshold voltage. The driver circuit provides the switching signal in response to the comparison output signal.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: May 11, 2021
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Dominique Romeo
  • Patent number: 10985655
    Abstract: Slope-compensated current mode DC-DC converters. Example embodiments are methods of operating a slope-compensated current mode DC-DC converter including asserting a pulse width modulation (PWM) signal in a switching period to couple an input voltage to the inductor; sensing an inductor current through an inductor to generate a sensed current signal; generating a slope compensation signal having a peak amplitude during the switching period; generating a slope offset signal based on a sum of a predefined threshold with a product of a duty cycle of the PWM signal and the peak amplitude; and de-asserting the PWM signal during the switching period based on the sensed current signal and the slope offset signal.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: April 20, 2021
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Dominique Romeo
  • Publication number: 20210099082
    Abstract: Slope-compensated current mode DC-DC converters. Example embodiments are methods of operating a slope-compensated current mode DC-DC converter including asserting a pulse width modulation (PWM) signal in a switching period to couple an input voltage to the inductor; sensing an inductor current through an inductor to generate a sensed current signal; generating a slope compensation signal having a peak amplitude during the switching period; generating a slope offset signal based on a sum of a predefined threshold with a product of a duty cycle of the PWM signal and the peak amplitude; and de-asserting the PWM signal during the switching period based on the sensed current signal and the slope offset signal.
    Type: Application
    Filed: November 5, 2019
    Publication date: April 1, 2021
    Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Dominique ROMEO
  • Publication number: 20200067411
    Abstract: Operating buck-boost converters. At least some of the example embodiments are methods including: producing an output voltage and an output current from the buck-boost converter; sensing a feedback parameter by a sensor disposed between an inductor of the buck-boost converter and a load; generating an error signal based on the feedback parameter; running the buck-boost converter in a buck-only mode, the buck-only mode operating at a switching frequency and during periods of time when the error signal is within a first range of values; and changing to a buck-boost mode when the error signal is in a second range of values, the buck-boost mode operating at the switching frequency; and transitioning to a boost-only mode when the error signal is in a third range of values, the boost-only mode operating at the switching frequency.
    Type: Application
    Filed: August 22, 2018
    Publication date: February 27, 2020
    Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Dominique ROMEO
  • Patent number: 10566902
    Abstract: Operating buck-boost converters. At least some of the example embodiments are methods including: producing an output voltage and an output current from the buck-boost converter; sensing a feedback parameter by a sensor disposed between an inductor of the buck-boost converter and a load; generating an error signal based on the feedback parameter; running the buck-boost converter in a buck-only mode, the buck-only mode operating at a switching frequency and during periods of time when the error signal is within a first range of values; and changing to a buck-boost mode when the error signal is in a second range of values, the buck-boost mode operating at the switching frequency; and transitioning to a boost-only mode when the error signal is in a third range of values, the boost-only mode operating at the switching frequency.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: February 18, 2020
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Dominique Romeo
  • Patent number: 9985528
    Abstract: In one form, an apparatus comprises a buck-boost converter circuit, a ripple emulator circuit, a ripple based controller circuit, and a switch control circuit. The buck-boost converter circuit includes a plurality of switches to be coupled to an inductor, and is configured to generate a regulated output voltage responsive to an input voltage. The ripple emulator circuit is configured to emulate inductor current ripple for a buck phase and a boost phase of the buck-boost converter to provide an emulated inductor current ripple. The ripple based controller circuit is configured to generate a hysteretic control signal responsive to the emulated inductor current ripple and the output voltage. The switch control circuit is configured to generate control signals for driving the plurality of switches responsive to the hysteretic control signal and a clock signal.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: May 29, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Dominique Romeo
  • Patent number: 9979294
    Abstract: A DC-DC converter includes an output power stage and a driver circuit. The output stage switches an input voltage to a switch node using a first transistor in response to a top-gate signal received at a top-gate node, and the switch node to ground using a second transistor in response to a bottom-gate signal received at a bottom-gate node. The driver circuit that provides the top- and bottom-gate signals in response to high- and low-side switch signals, respectively, activates the top-gate signal by actively regulating the top-gate node to a first voltage between a threshold voltage and a breakdown voltage of the first transistor using charge from the bottom-gate node, and activates the bottom-gate signal by actively regulating a second voltage provided to the bottom-gate node between a threshold voltage and a breakdown voltage of the second transistor using charge from the top-gate node.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: May 22, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Paul Jay Harriman, Andrea Bonelli, Dominique Romeo
  • Publication number: 20160294277
    Abstract: In one form, an apparatus comprises a buck-boost converter circuit, a ripple emulator circuit, a ripple based controller circuit, and a switch control circuit. The buck-boost converter circuit includes a plurality of switches to be coupled to an inductor, and is configured to generate a regulated output voltage responsive to an input voltage. The ripple emulator circuit is configured to emulate inductor current ripple for a buck phase and a boost phase of the buck-boost converter to provide an emulated inductor current ripple. The ripple based controller circuit is configured to generate a hysteretic control signal responsive to the emulated inductor current ripple and the output voltage. The switch control circuit is configured to generate control signals for driving the plurality of switches responsive to the hysteretic control signal and a clock signal.
    Type: Application
    Filed: February 9, 2016
    Publication date: October 6, 2016
    Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Dominique ROMEO
  • Publication number: 20150381037
    Abstract: In one form, a control circuit is adapted for use with a power converter having an inductor and a switch switching the inductor in response to a switching signal to regulate an output voltage of the power converter. The control circuit includes a slow feedback path, a fast feedback path, an integrator, a comparator, and a drive circuit. The slow feedback path provides a ripple signal in response to an average value of the output voltage. The fast feedback path provides a feedback signal in response to the output voltage. The integrator provides an error signal in response to a sum of the feedback signal and the ripple signal. The comparator provides a comparison output signal in response to a comparison of the error signal and a threshold voltage. The driver circuit provides the switching signal in response to the comparison output signal.
    Type: Application
    Filed: April 15, 2015
    Publication date: December 31, 2015
    Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Dominique ROMEO