Patents by Inventor Cristian Garbossa
Cristian Garbossa 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).
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Patent number: 11863080Abstract: An active-clamped isolated SEPIC DC-DC power converter (ACISC) to convert a DC voltage to supply a variety of DC loads. The single-ended primary-inductor converter (SEPIC) of the ACISC may be configured to perform both buck and boost converter functions. The ACISC of this disclosure may be configured to operate over a wide input voltage range to provide an output voltage for DC electronic loads supplied by the power converter. In the example of an automobile, a back-up twelve volt battery may output voltages to the ACISC over a wide voltage range, e.g., nine volts to eighteen volts. The wide input voltage range of the ACISC may be desirable when used as the converter for a back-up battery supply. The circuitry arrangement and component selection of the ACISC of this disclosure cause the power converter to operate in resonant DCM mode in the megahertz (MHz) frequency range.Type: GrantFiled: February 15, 2022Date of Patent: January 2, 2024Assignees: Infineon Technologies AG, Università Degli Studi di PadovaInventors: Stefano Cabizza, Giorgio Spiazzi, Cristian Garbossa
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Patent number: 11855444Abstract: A system topology may use intentional signal injection to monitor one or more power supply circuits that may supply electrical power to components of the system. The system topology may include voltage monitoring circuitry to monitor the output of the power supply. In some examples, a power supply rail fault may happen either inside or outside of the power supply circuit, but not be detectable by the voltage monitoring circuitry. Injecting a check signal in the presence of an actual fault, may cause oscillations at the output node of the power supply detectable by the voltage monitoring circuitry. Once the check signal, combined with the fault signal, at the output node reaches the monitoring threshold detectable by the voltage monitoring circuitry, the voltage monitoring circuitry may output an indication of the fault to processing circuitry of the system.Type: GrantFiled: April 9, 2021Date of Patent: December 26, 2023Assignee: Infineon Technologies AGInventors: Ozan Serpedin, Cristian Garbossa
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Patent number: 11804775Abstract: In some examples, a device includes a selector circuit configured to deliver power to a first driver circuit, where the first driver circuit is configured to activate and deactivate a first switch of a postregulator. The device also includes a startup regulator and a controller configured to cause the selector circuit to deliver power from the startup regulator to the first driver circuit. The controller is also configured to determine that a boost regulator is operational after delivering power from the startup regulator to the first driver circuit. The controller is further configured to cause the selector circuit to deliver power from the boost regulator to the first driver circuit in response to determining that the boost regulator is operational.Type: GrantFiled: April 27, 2021Date of Patent: October 31, 2023Assignee: Infineon Technologies AGInventors: Cristian Garbossa, Alberto Arpino, Michele Bergo, Dario Cappuzzo, Bogdan Dimitriu, Vlad Alexandru Mircea Ionescu, Paola Lops, Luca Scandola, Ozan Serpedin, Silvia Solda
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Publication number: 20230318472Abstract: An active-clamped isolated SEPIC DC-DC power converter (ACISC) to convert a DC voltage to supply a variety of DC loads. The single-ended primary-inductor converter (SEPIC) of the ACISC may be configured to perform both buck and boost converter functions. The ACISC of this disclosure may be configured to operate over a wide input voltage range to provide an output voltage for DC electronic loads supplied by the power converter. In the example of an automobile, a back-up twelve volt battery may output voltages to the ACISC over a wide voltage range, e.g., nine volts to eighteen volts. The wide input voltage range of the ACISC may be desirable when used as the converter for a back-up battery supply. The circuitry arrangement and component selection of the ACISC of this disclosure cause the power converter to operate in resonant DCM mode in the megahertz (MHz) frequency range.Type: ApplicationFiled: February 15, 2022Publication date: October 5, 2023Applicant: Università degli Studi di PadovaInventors: Stefano Cabizza, Giorgio Spiazzi, Cristian Garbossa
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Patent number: 11682962Abstract: This disclosure includes systems, methods, and techniques for controlling a semiconductor device of a power converter. For example, a circuit includes first control circuitry configured to receive an indication of a first voltage which represents a voltage output from a power source to the power converter. Additionally, the first control circuitry is configured to output a control signal to second control circuitry in order to control, based on the first voltage and the second voltage, the semiconductor device so that a second voltage is lower than the first voltage, wherein the second voltage represents a voltage output from the power converter to a load.Type: GrantFiled: April 27, 2021Date of Patent: June 20, 2023Assignee: Infineon Technologies AGInventors: Alberto Arpino, Michele Bergo, Cristian Garbossa, Luca Scandola
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Patent number: 11652400Abstract: A method of operating a power protection system coupled between a power source and a power converter includes producing, by a controller of the power protection system, a driving signal to a cut-off switch of the power protection system to electrically couple the power source to the power converter; detecting, by the controller of the power protection system, a fault condition of the power converter while the power converter is in operation, where the detecting includes detecting, by the controller of the power protection system, that a current flowing through the cut-off switch is above a pre-determined threshold while a gate control signal from the power converter indicates an OFF state for a first current path of the power converter; and in response to detecting the fault condition, turning off, by the controller of the power protection system, the cut-off switch to isolate the power source from the power converter.Type: GrantFiled: October 15, 2021Date of Patent: May 16, 2023Assignee: Infineon Technologies AGInventors: Cristian Garbossa, Enrico Orietti
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Patent number: 11552544Abstract: A circuit may be configured detect current in different phases of an N-phase power converter. The circuit may comprise a first set of elements defining at least part of a first current loop associated with a first phase of the power converter, wherein the first set of elements is configured to detect current during the first phase of the power converter. In addition, the circuit may comprise a second set of elements defining at least part of a second current loop associated with a second phase of the power converter, wherein the second set of elements is configured to detect current during the second phase of the power converter when a duty cycle associated with the different phases is greater than 100/N, and wherein the first set of elements is configured to detect current during the second phase of the power converter when the duty cycle is less than 100/N.Type: GrantFiled: April 27, 2021Date of Patent: January 10, 2023Assignee: Infineon Technologies AGInventors: Luca Scandola, Cristian Garbossa
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Patent number: 11545887Abstract: This disclosure describes a protection circuit configured to protect a power converter. The protection circuit may be configured to determine when the power converter is operating in a tristate mode, and upon determining that the power converter is operating in the tristate mode, to disable a supply to the power converter based on a comparison of a switch node voltage on a switch node of the power converter to a feedback node voltage on an output node of the power converter.Type: GrantFiled: April 16, 2021Date of Patent: January 3, 2023Assignee: Infineon Technologies AGInventors: Vlad Alexandru Mircea Ionescu, Cristian Garbossa, Andrea Zuccollo
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Publication number: 20220368210Abstract: This disclosure includes systems, methods, and techniques for controlling a semiconductor device of a power converter. For example, a circuit includes first control circuitry configured to receive an indication of a first voltage which represents a voltage output from a power source to the power converter. Additionally, the first control circuitry is configured to output a control signal to second control circuitry in order to control, based on the first voltage and the second voltage, the semiconductor device so that a second voltage is lower than the first voltage, wherein the second voltage represents a voltage output from the power converter to a load.Type: ApplicationFiled: April 27, 2021Publication date: November 17, 2022Inventors: Alberto Arpino, Michele Bergo, Cristian Garbossa, Luca Scandola
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Patent number: 11493982Abstract: Systems, methods, and circuitries are provided for controlling a microcontroller (MCU) on a per-application basis. A control system includes a microcontroller unit (MCU) including a first application group and a second application group. The first application group includes at least one hardware component not associated with the second application group. The control system includes a power management integrated circuit (PMIC). The PMIC includes monitoring circuitry configured to monitor the first application group to detect a first application group fault condition and monitor the second application group to detect a second application group fault condition. Based on the monitoring, the PMIC provides a first reset signal to the first application group that does not reset the second application group or provides a second reset signal to the second application group that does not reset the first application group.Type: GrantFiled: January 20, 2021Date of Patent: November 8, 2022Assignee: Infineon Technologies AGInventors: Konstantin Ivanchenko, Cristian Garbossa, Bejoy Mathews
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Publication number: 20220345039Abstract: In some examples, a device includes a selector circuit configured to deliver power to a first driver circuit, where the first driver circuit is configured to activate and deactivate a first switch of a postregulator. The device also includes a startup regulator and a controller configured to cause the selector circuit to deliver power from the startup regulator to the first driver circuit. The controller is also configured to determine that a boost regulator is operational after delivering power from the startup regulator to the first driver circuit. The controller is further configured to cause the selector circuit to deliver power from the boost regulator to the first driver circuit in response to determining that the boost regulator is operational.Type: ApplicationFiled: April 27, 2021Publication date: October 27, 2022Inventors: Cristian Garbossa, Alberto Arpino, Michele Bergo, Dario Cappuzzo, Bogdan Dimitriu, Vlad Alexandru Mircea Ionescu, Paola Lops, Luca Scandola, Ozan Serpedin, Silvia Solda
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Publication number: 20220345024Abstract: A circuit may be configured detect current in different phases of an N-phase power converter. The circuit may comprise a first set of elements defining at least part of a first current loop associated with a first phase of the power converter, wherein the first set of elements is configured to detect current during the first phase of the power converter. In addition, the circuit may comprise a second set of elements defining at least part of a second current loop associated with a second phase of the power converter, wherein the second set of elements is configured to detect current during the second phase of the power converter when a duty cycle associated with the different phases is greater than 100/N, and wherein the first set of elements is configured to detect current during the second phase of the power converter when the duty cycle is less than 100/N.Type: ApplicationFiled: April 27, 2021Publication date: October 27, 2022Inventors: Luca Scandola, Cristian Garbossa
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Publication number: 20220337149Abstract: This disclosure describes a protection circuit configured to protect a power converter. The protection circuit may be configured to determine when the power converter is operating in a tristate mode, and upon determining that the power converter is operating in the tristate mode, to disable a supply to the power converter based on a comparison of a switch node voltage on a switch node of the power converter to a feedback node voltage on an output node of the power converter.Type: ApplicationFiled: April 16, 2021Publication date: October 20, 2022Inventors: Vlad Alexandru Mircea Ionescu, Cristian Garbossa, Andrea Zuccollo
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Publication number: 20220329060Abstract: A system topology may use intentional signal injection to monitor one or more power supply circuits that may supply electrical power to components of the system. The system topology may include voltage monitoring circuitry to monitor the output of the power supply. In some examples, a power supply rail fault may happen either inside or outside of the power supply circuit, but not be detectable by the voltage monitoring circuitry. Injecting a check signal in the presence of an actual fault, may cause oscillations at the output node of the power supply detectable by the voltage monitoring circuitry. Once the check signal, combined with the fault signal, at the output node reaches the monitoring threshold detectable by the voltage monitoring circuitry, the voltage monitoring circuitry may output an indication of the fault to processing circuitry of the system.Type: ApplicationFiled: April 9, 2021Publication date: October 13, 2022Inventors: Ozan Serpedin, Cristian Garbossa
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Publication number: 20220229486Abstract: Systems, methods, and circuitries are provided for controlling a microcontroller (MCU) on a per-application basis. A control system includes a microcontroller unit (MCU) including a first application group and a second application group. The first application group includes at least one hardware component not associated with the second application group. The control system includes a power management integrated circuit (PMIC). The PMIC includes monitoring circuitry configured to monitor the first application group to detect a first application group fault condition and monitor the second application group to detect a second application group fault condition. Based on the monitoring, the PMIC provides a first reset signal to the first application group that does not reset the second application group or provides a second reset signal to the second application group that does not reset the first application group.Type: ApplicationFiled: January 20, 2021Publication date: July 21, 2022Inventors: Konstantin Ivanchenko, Cristian Garbossa, Bejoy Mathews
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Patent number: 11329618Abstract: Differential control circuitry configured to control the operation of a power converter. The control circuitry of this disclosure is configured to receive two differential feedback signals from a fully differential amplifier. The amplifier receives an output voltage (Vout) from the switched mode power supply as well as a reference voltage (Vref). When Vout is less than Vref, the control circuitry may output a pulse width modulation (PWM) control signal to the switched mode power supply with a duty cycle of the PWM control signal based on a relative difference between a positive difference voltage and a negative difference voltage. When Vout is greater than Vref, the control circuitry may output a pulse frequency modulation (PFM) control signal to the switched mode power supply with a switching time of the PFM control signal based on a relative difference between the positive difference voltage and the negative difference voltage.Type: GrantFiled: September 22, 2020Date of Patent: May 10, 2022Assignee: Infineon Technologies AGInventors: Davide Dal Bianco, Cristian Garbossa
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Publication number: 20220094318Abstract: Differential control circuitry configured to control the operation of a power converter. The control circuitry of this disclosure is configured to receive two differential feedback signals from a fully differential amplifier. The amplifier receives an output voltage (Vout) from the switched mode power supply as well as a reference voltage (Vref). When Vout is less than Vref, the control circuitry may output a pulse width modulation (PWM) control signal to the switched mode power supply with a duty cycle of the PWM control signal based on a relative difference between a positive difference voltage and a negative difference voltage. When Vout is greater than Vref, the control circuitry may output a pulse frequency modulation (PFM) control signal to the switched mode power supply with a switching time of the PFM control signal based on a relative difference between the positive difference voltage and the negative difference voltage.Type: ApplicationFiled: September 22, 2020Publication date: March 24, 2022Inventors: Davide Dal Bianco, Cristian Garbossa
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Publication number: 20220066491Abstract: A circuit configured to perform low-dropout regulation of an output voltage includes a first buffer, a second buffer, controller circuitry, and switching circuitry. The first buffer includes a first driving element configured to provide a first current into a first output node based on the output voltage. The first bias circuitry is configured to bias the first current. The second buffer includes a second driving element configured to provide a second current into a second output node based on a voltage at the first output node. The second bias circuitry is configured to bias the second current. The controller circuitry is configured to generate a control signal based on a current at the pass device and switching circuitry configured to electrically couple the first output node to the control node of the pass device based on the control signal.Type: ApplicationFiled: September 1, 2020Publication date: March 3, 2022Inventors: Ionut-Alin Ilie, Cristian Garbossa, Cristian Stefan Zegheru
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Patent number: 11243553Abstract: A circuit configured to perform low-dropout regulation of an output voltage includes a first buffer, a second buffer, controller circuitry, and switching circuitry. The first buffer includes a first driving element configured to provide a first current into a first output node based on the output voltage. The first bias circuitry is configured to bias the first current. The second buffer includes a second driving element configured to provide a second current into a second output node based on a voltage at the first output node. The second bias circuitry is configured to bias the second current. The controller circuitry is configured to generate a control signal based on a current at the pass device and switching circuitry configured to electrically couple the first output node to the control node of the pass device based on the control signal.Type: GrantFiled: September 1, 2020Date of Patent: February 8, 2022Assignee: Infineon Technologies AGInventors: Ionut-Alin Ilie, Cristian Garbossa, Cristian Stefan Zegheru
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Publication number: 20220037991Abstract: A method of operating a power protection system coupled between a power source and a power converter includes producing, by a controller of the power protection system, a driving signal to a cut-off switch of the power protection system to electrically couple the power source to the power converter; detecting, by the controller of the power protection system, a fault condition of the power converter while the power converter is in operation, where the detecting includes detecting, by the controller of the power protection system, that a current flowing through the cut-off switch is above a pre-determined threshold while a gate control signal from the power converter indicates an OFF state for a first current path of the power converter; and in response to detecting the fault condition, turning off, by the controller of the power protection system, the cut-off switch to isolate the power source from the power converter.Type: ApplicationFiled: October 15, 2021Publication date: February 3, 2022Inventors: Cristian Garbossa, Enrico Orietti