Patents by Inventor Darryl Tschirhart

Darryl Tschirhart 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: 20220368230
    Abstract: An apparatus includes a controller. The controller monitors a magnitude of voltage powering a first dynamic load disposed in a series circuit path of multiple dynamic loads. The controller compares the magnitude of the voltage to a reference voltage. Based on the comparing, the controller controls operation of multiple power converter phases in a power converter to maintain a magnitude of the voltage powering the first dynamic load.
    Type: Application
    Filed: May 17, 2021
    Publication date: November 17, 2022
    Inventors: Kushal KSHIRSAGAR, Prasan KASTURI, Danny Clavette, Darryl TSCHIRHART
  • Patent number: 11502595
    Abstract: An isolated switched-mode power converter converts power from an input source into power for an output load. Power switches within a primary-side power stage control the amount of power input to the power converter and, ultimately, provided to the output load. A digital controller on the secondary side of the power converter generates signals to control the power switches. This controller also senses a rectified voltage on the secondary side of the power converter and uses this sensed voltage to detect fault conditions of the primary side. For example, the sensed rectified voltage is used to detect undervoltage or overvoltage conditions of the input power source of the power converter, or faulty power switches within the primary-side power stage.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: November 15, 2022
    Assignee: Infineon Technologies Austria AG
    Inventors: Benjamim Tang, Hongying Ding, Sue Perranoski, Richard Pierson, Darryl Tschirhart
  • Patent number: 11474547
    Abstract: A scheme is provided for dynamically adjusting an amount of power drawn from individual power sources to optimize the power usage without violating power limits. Coarse adjustment is provided through dynamic phase reallocation while a fine adjustment is provided through dynamic current steering. By adding a control loop around current steering techniques in digital voltage regulator controllers, power drawn from multiple input rails is balanced. The apparatus allows users to maximize the power delivered to discrete graphics cards without violating PCIe specifications. This allows maximum performance with minimal bill-of-material (BOM) cost.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: October 18, 2022
    Assignee: Intel Corporation
    Inventors: Darryl Tschirhart, Alan Wu, Jason Lee Pack, Yvan Large, Sanjeev Jahagirdar
  • Patent number: 11462988
    Abstract: An apparatus includes a controller. The controller controls a first power supply to produce an output current supplied through a series connection of multiple dynamic loads powered at least in part by the output current. The controller further monitors current consumption by the multiple dynamic loads. Based on the monitored current consumption, the controller adjusts a magnitude of the output current from the power supply supplied through the series connection.
    Type: Grant
    Filed: July 19, 2021
    Date of Patent: October 4, 2022
    Assignee: Infineon Technologies Austria AG
    Inventors: Darryl Tschirhart, Kushal Kshirsagar, Danny Clavette, Prasan Kasturi
  • Patent number: 11283356
    Abstract: A method of assembling a DC-DC converter includes: attaching first and second discrete power stage transistor dies to a first side of a substrate, the first discrete die including a high-side power transistor and the second discrete die including a low-side power transistor electrically connected to the high-side power transistor to form an output phase of the DC-DC converter; attaching an inductor to the first side of the substrate so as to electrically connect the output phase to a metal output trace on the substrate, the inductor partly covering at least one of the first and the second discrete power stage transistor dies such that each discrete power stage transistor die that is partly covered by the inductor comprises a plurality of pins that are not covered by the inductor; and visually inspecting the plurality of pins uncovered by the inductor.
    Type: Grant
    Filed: November 10, 2020
    Date of Patent: March 22, 2022
    Assignee: Infineon Technologies North America Corp.
    Inventors: Darryl Tschirhart, Benjamim Tang, Emil Todorov
  • Publication number: 20210255650
    Abstract: A scheme is provided for dynamically adjusting an amount of power drawn from individual power sources to optimize the power usage without violating power limits. Coarse adjustment is provided through dynamic phase reallocation while a fine adjustment is provided through dynamic current steering. By adding a control loop around current steering techniques in digital voltage regulator controllers, power drawn from multiple input rails is balanced. The apparatus allows users to maximize the power delivered to discrete graphics cards without violating PCIe specifications. This allows maximum performance with minimal bill-of-material (BOM) cost.
    Type: Application
    Filed: February 14, 2020
    Publication date: August 19, 2021
    Applicant: Intel Corporation
    Inventors: Darryl Tschirhart, Alan Wu, Jason Lee Pack, Yvan Large, Sanjeev Jahagirdar
  • Publication number: 20210057996
    Abstract: A method of assembling a DC-DC converter includes: attaching first and second discrete power stage transistor dies to a first side of a substrate, the first discrete die including a high-side power transistor and the second discrete die including a low-side power transistor electrically connected to the high-side power transistor to form an output phase of the DC-DC converter; attaching an inductor to the first side of the substrate so as to electrically connect the output phase to a metal output trace on the substrate, the inductor partly covering at least one of the first and the second discrete power stage transistor dies such that each discrete power stage transistor die that is partly covered by the inductor comprises a plurality of pins that are not covered by the inductor; and visually inspecting the plurality of pins uncovered by the inductor.
    Type: Application
    Filed: November 10, 2020
    Publication date: February 25, 2021
    Inventors: Darryl Tschirhart, Benjamim Tang, Emil Todorov
  • Patent number: 10855178
    Abstract: A DC-DC converter includes a substrate having opposing first and second sides, a first discrete power stage transistor die attached to the first side of the substrate and including a high-side power transistor, and a second discrete power stage transistor die attached to the first side of the substrate and including a low-side power transistor electrically connected to the high-side power transistor to form an output phase of the DC-DC converter. The DC-DC converter further includes an inductor attached to the first side of the substrate so as to electrically connect the output phase to a metal output trace on the substrate. The inductor at least partly covers at least one of the first and the second discrete power stage transistor dies.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: December 1, 2020
    Assignee: Infineon Technologies Austria AG
    Inventors: Darryl Tschirhart, Benjamim Tang, Emil Todorov
  • Patent number: 10686386
    Abstract: A resonant or semi-resonant DC/DC converter makes use of one or more synchronous rectification (SR) switches for rectifying an output current that is provided to a load of the converter. The SR switches are ideally turned off when zero current is flowing through them. To achieve such zero-current switching, the current through each of the SR switches is monitored and compared against a turn-off threshold. The turn-off threshold for a particular SR switch is determined from the slope of a waveform of the current together with a transition delay for turning off the SR switch. This transition delay typically includes a delay through a driver circuit for the SR switch together with a latency through the SR switch itself. Once it is detected that the current for an SR switch has dropped to or below the turn-off threshold, a signal is provided to the SR switch turning it off.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: June 16, 2020
    Assignee: Infineon Technologies Austria AG
    Inventors: Darryl Tschirhart, Amir Babazadeh
  • Patent number: 10601333
    Abstract: An isolated switched-mode power converter converts power from an input source into power for an output load. Power switches within a primary-side power stage control the amount of power input to the power converter and, ultimately, provided to the output load. A digital controller on the secondary side of the power converter generates signals to control the power switches. This generation is based upon closed-loop (feedback) control as well as feedforward control. The feedforward control compensates for variations in the voltage of the input source. The input voltage is estimated by sensing a rectified voltage at a node between a secondary winding of the isolation transformer and an output filter. The feedforward compensation modifies the generated switch control signals based upon the sensed rectified voltage.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: March 24, 2020
    Assignee: Infineon Technologies Austria AG
    Inventors: Benjamim Tang, Hongying Ding, Sue Perranoski, Richard Pierson, Darryl Tschirhart
  • Publication number: 20200083813
    Abstract: An isolated switched-mode power converter converts power from an input source into power for an output load. Power switches within a primary-side power stage control the amount of power input to the power converter and, ultimately, provided to the output load. A digital controller on the secondary side of the power converter generates signals to control the power switches. This controller also senses a rectified voltage on the secondary side of the power converter and uses this sensed voltage to detect fault conditions of the primary side. For example, the sensed rectified voltage is used to detect undervoltage or overvoltage conditions of the input power source of the power converter, or faulty power switches within the primary-side power stage.
    Type: Application
    Filed: September 6, 2018
    Publication date: March 12, 2020
    Inventors: Benjamim Tang, Hongying Ding, Sue Perranoski, Richard Pierson, Darryl Tschirhart
  • Publication number: 20200067416
    Abstract: An isolated switched-mode power converter converts power from an input source into power for an output load. Power switches within a primary-side power stage control the amount of power input to the power converter and, ultimately, provided to the output load. A digital controller on the secondary side of the power converter generates signals to control the power switches. This generation is based upon closed-loop (feedback) control as well as feedforward control. The feedforward control compensates for variations in the voltage of the input source. The input voltage is estimated by sensing a rectified voltage at a node between a secondary winding of the isolation transformer and an output filter. The feedforward compensation modifies the generated switch control signals based upon the sensed rectified voltage.
    Type: Application
    Filed: August 22, 2018
    Publication date: February 27, 2020
    Inventors: Benjamim Tang, Hongying Ding, Sue Perranoski, Richard Pierson, Darryl Tschirhart
  • Patent number: 10554138
    Abstract: A method of controlling an isolated DC-DC converter includes switching the primary side switching devices of the converter at a fixed first switching period and variable duty cycle during non-transient load conditions so as to transfer energy across the transformer of the converter during first energy transfer intervals separated by energy circulation intervals, such that the ratio of each first energy transfer interval to the first switching period is less than unity. The method also includes switching the primary side switching devices at a second switching period different than the first switching period during a transient load condition so as to transfer energy across the transformer during second energy transfer intervals of a duration determined so as to avoid saturation of the transformer core, and such that any energy circulation interval separating the second energy transfer intervals is shorter than the energy circulation intervals separating the first energy transfer intervals.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: February 4, 2020
    Assignee: Infineon Technologies Austria AG
    Inventors: Darryl Tschirhart, Amir Babazadeh
  • Patent number: 10439500
    Abstract: An isolated power converter includes primary side switch devices coupled to secondary side rectifying devices by a transformer and a controller. Responsive to a transient load condition, the controller switches the primary side switch devices at an initial switching period having a positive half cycle and a negative half cycle to transfer energy across the transformer during the positive half cycle and the negative half cycle. The positive half cycle and the negative half cycle of the initial switching period have the same initial duration. The controller is further operable to symmetrically reduce the duration of the positive half cycle and the negative half cycle for at least one subsequent switching period during the transient load condition.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: October 8, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Amir Babazadeh, Darryl Tschirhart
  • Patent number: 10333407
    Abstract: A multi-phase DC-DC converter includes a substrate having opposing first and second sides, a plurality of power stage packages attached to the first side of the substrate, each power stage package including active semiconductor components operable to provide an output phase of the multi-phase DC-DC converter, and a coupled inductor attached to the first side of the substrate and at least partly covering two or more of the power stage packages. The coupled inductor includes separate windings wound on the same core. Each winding of the coupled inductor electrically connects an output of one of the power stage packages at least partly covered by the coupled inductor to a metal trace on the substrate such that the outputs of the power stage packages at least partly covered by the coupled inductor are electrically connected to the same metal trace on the substrate.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: June 25, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Emil Todorov, Benjamim Tang, Darryl Tschirhart
  • Patent number: 10218278
    Abstract: A switching voltage converter using an isolated topology includes a transformer for coupling power from an input source to an output load. The transformer must be protected to prevent saturation of its core due to excessive magnetic flux density as the transformer transfers power from its primary side to its secondary side. The magnetic flux is estimated using a voltage measured on the primary or secondary side of the transformer, wherein the secondary-side voltage may be a rectified voltage. If the estimated magnetic flux is detected as approaching a saturation level of the transformer core, any power being input to the transformer is curtailed. This may be accomplished by modifying pulse-width modulated (PWM) waveforms controlling power switches that control the input power transferred to the transformer. Using these techniques, transformer saturation may be avoided without requiring a significantly oversized transformer within the voltage converter.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: February 26, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Darryl Tschirhart, Amir Babazadeh
  • Patent number: 10069414
    Abstract: A voltage regulator includes a power stage configured to produce an output voltage from an input voltage at an input voltage terminal, a shunt resistor connected in series between the input voltage terminal and the power stage, a first level shifting resistor connected in series between a first terminal of the shunt resistor and a first sense pin of the controller, and a second level shifting resistor connected in series between a second terminal of the shunt resistor and a second sense pin of the controller. The input current of the regulator is sensed as a function of the voltage across the shunt resistor, as shifted down by the level shifting resistors and measured across the sense pins. The input voltage of the regulator is sensed as a function of the current flowing through either one of the level shifting resistors, as measured at one of the sense pins.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: September 4, 2018
    Assignee: Infineon Technologies Austria AG
    Inventors: Sujata Sen, Benjamim Tang, Darryl Tschirhart
  • Publication number: 20180219485
    Abstract: An isolated power converter includes primary side switch devices coupled to secondary side rectifying devices by a transformer and a controller. Responsive to a transient load condition, the controller switches the primary side switch devices at an initial switching period having a positive half cycle and a negative half cycle to transfer energy across the transformer during the positive half cycle and the negative half cycle. The positive half cycle and the negative half cycle of the initial switching period have the same initial duration. The controller is further operable to symmetrically reduce the duration of the positive half cycle and the negative half cycle for at least one subsequent switching period during the transient load condition.
    Type: Application
    Filed: February 1, 2017
    Publication date: August 2, 2018
    Inventors: Amir Babazadeh, Darryl Tschirhart
  • Publication number: 20180152111
    Abstract: A resonant or semi-resonant DC/DC converter makes use of one or more synchronous rectification (SR) switches for rectifying an output current that is provided to a load of the converter. The SR switches are ideally turned off when zero current is flowing through them. To achieve such zero-current switching, the current through each of the SR switches is monitored and compared against a turn-off threshold. The turn-off threshold for a particular SR switch is determined from the slope of a waveform of the current together with a transition delay for turning off the SR switch. This transition delay typically includes a delay through a driver circuit for the SR switch together with a latency through the SR switch itself. Once it is detected that the current for an SR switch has dropped to or below the turn-off threshold, a signal is provided to the SR switch turning it off.
    Type: Application
    Filed: November 30, 2016
    Publication date: May 31, 2018
    Inventors: Darryl Tschirhart, Amir Babazadeh
  • Patent number: 9973084
    Abstract: An estimate of voltage regulator input power is provide by estimating output power of the voltage regulator based on output voltage and output current of the voltage regulator, estimating power loss of the voltage regulator and estimating input power of the voltage regulator based on the estimated output power and the estimated power loss.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: May 15, 2018
    Assignee: Infineon Technologies Austria AG
    Inventors: Benjamim Tang, Darryl Tschirhart, Tim Ng