Patents Examined by Matthew V. Nguyen
  • Patent number: 11329557
    Abstract: A single-inductor multiple-output (SIMO) converter includes a converter configured to provide respective voltages of a plurality of channels with a single inductor and a control logic configured to control switches of the converter based on clocks corresponding to the plurality of channels, wherein the control logic is configured to compare an output voltage of a selected channel of the plurality of channels that corresponds to a control target to a reference voltage of the selected channel based on a clock of the selected channel and operate in one of a first mode that adaptively adjusts a number of times that a pulse triggering a power transfer to the channel is generated, and a second mode that blocks a generation of the pulse.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: May 10, 2022
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Seungchul Jung, Kye-Seok Yoon, Gyu-Hyeong Cho, Sang Joon Kim, Sang Jin Lim
  • Patent number: 11329560
    Abstract: A voltage converter with which energy conversion efficiency can be improved during not only low-load conditions but also high-load conditions. A step-down DC-DC converter includes a tapped inductor and a capacitor. The inductor and the capacitor form an LC filter. The inductor and a switching element form a variable inductor having a changeable inductance value. The capacitor and a variable DC voltage source form a variable capacitor having a changeable capacitance value. A control unit changes the inductance value of the variable inductor in accordance with an input/output voltage ratio Vin/Vout between a DC input voltage and a DC output voltage. The control unit changes the capacitance value of the variable capacitor to a capacitance value with which an LC resonant frequency is maintained constant when changing the inductance value of the variable inductor.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: May 10, 2022
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Norimichi Onozaki
  • Patent number: 11314273
    Abstract: Disclosed is a power supply switching circuit comprising: a first switch pair configured to selectively connect a first power supply node to an output node; a second switch pair configured to selectively connect a second power supply node to the output node; and a switch control circuit configured to: respectively control first and second switches of the first switch pair by a first control signal and a second control signal; respectively control first and second switches of the second switch pair by a third control signal and a fourth control signal; and selectively connect one of the first power supply node or the second power supply node to the output node by at least one of (a) the first and second control signals or (b) the third and fourth control signals. At least one of the second control signal or the fourth control signal is powered via the output node.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: April 26, 2022
    Assignee: u-blox AG
    Inventor: Filippo Neri
  • Patent number: 11309797
    Abstract: A voltage regulation system utilizes a controller to select one of a continuous comparator and a discrete comparator to operate, making one of the continuous comparator and the discrete comparator output a pulse signal to the controller. The controller controls a switched power stage circuit to supply power to a load element. Through the aforementioned configuration, the switched power stage circuit adjusts the power supply based on the condition of the load element, thus decreasing the power loss of the switched power stage circuit.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: April 19, 2022
    Inventor: Chung-Ming Hsieh
  • Patent number: 11303207
    Abstract: A method of controlling a power converter includes: generating a modulation signal for controlling a phase current of a power stage of the power converter such that an output voltage of the power converter follows a load line having a slope that determines a rate of change of the output voltage as a function of load current; receiving a signal which indicates a target voltage regulation setpoint; and overriding the load line when the signal is active, such that the output voltage follows the target voltage regulation setpoint instead of the load line when the signal is present at the interface.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: April 12, 2022
    Assignee: Infineon Technologies Austria AG
    Inventors: Jayadevan Radhakrishnan, Danny Clavette
  • Patent number: 11295911
    Abstract: A safety switching device for controlling a load having at least one input for receiving an input signal and one output for outputting an output signal, and having an electrical circuit which provides the output signal as a function of the input signal. The electrical circuit is arranged on a printed circuit board and is coupled to at least one setting component for setting an operating parameter of the safety switching device. The surface of the printed circuit board defines a mounting plane, and the at least one setting component has an adjusting element in a housing and is arranged recessed on the printed circuit board so that the housing of the adjusting element intersects the mounting plane.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: April 5, 2022
    Assignee: Pilz GmbH & Co. KG
    Inventors: Christoph Zinser, Lothar Merz
  • Patent number: 11296600
    Abstract: The present disclosure relates to a buck converter which includes a voltage converter configured to convert an input voltage into an output voltage by a driving signal, a compensator configured to generate an error compensation signal by receiving a feedback signal defined from the output voltage, an active ramp controller configured to generate a ramp signal by adjusting a ramp bias voltage when load transient occurs, and an output voltage controller configured to adjust the output voltage using the ramp signal and the error compensation signal.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: April 5, 2022
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Bai Sun Kong, Jung Duk Suh
  • Patent number: 11286131
    Abstract: The invention relates to an energizing circuit of at least one magnetizing coil of an operational brake, the energizing circuit being configured for energizing the magnetizing coil, which energizing circuit comprises a rectifying bridge connected to the supply network, the output terminals of the rectifying bridge being connectable/connected to the input points of the magnetizing coil, characterized in that the energizing circuit comprises at least one reduced voltage circuit or external DC supply, whose outputs are connectable via to the to the input points of the magnetizing coil via a controllable operation switch of the energizing circuit. The patent application also comprises claims for a passenger conveyor and for a method.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: March 29, 2022
    Assignee: KONE Corporation
    Inventor: Arto Nakari
  • Patent number: 11290012
    Abstract: A converter that makes it possible to selectively switch between various converter architectures that are capable of supplying different output voltages on the basis of one and the same input voltage. The various architectures share at least some electronic components with one another, thereby decreasing the production cost of the converter according to the invention. The converter is particularly advantageous for lighting modules for motor vehicles, in which there are substantial space constraints but in which wide output-voltage ranges are required to be able to supply a varied and substantial number of electroluminescent light sources (LEDs) with power.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: March 29, 2022
    Assignee: VALEO VISION
    Inventors: David Boudikian, Jean-Philippe Alves, Irantzu Jauregi, Jintao-Lita Liang
  • Patent number: 11289998
    Abstract: In some examples, an apparatus comprises a switching regulator circuit, an output circuit, a duty cycle comparison circuit, a current comparison circuit, and a switching regulator control circuit. The switching regulator circuit switches between first and second voltages. The output circuit has a voltage input and a voltage output and generates a signal based on the first and second voltages. The duty cycle comparison circuit asserts a first signal responsive to a voltage at the voltage output exceeding a product of a multiplier and a reference signal. The current comparison circuit asserts a second signal responsive to a voltage at the voltage input exceeding a first reference voltage and to assert a third signal responsive to the voltage at the voltage input being below a second reference voltage. The switching regulator control circuit controls the switching regulator circuit based on the first, the second, and the third signals.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: March 29, 2022
    Inventors: Juha Olavi Hauru, Ari Kalevi Väänänen, Antti Juhani Korhonen, Janne Matias Pahkala, Jussi Matti Aleksi Särkkä
  • Patent number: 11283352
    Abstract: The present invention discloses a modular multilevel dynamic switching DC-DC transformer, which consists of N DC-DC sub-modules connected in series. Each of the DC-DC sub-modules is of a symmetrical structure capable of realizing bidirectional power flow, which consists of two half-bridge sub-modules and isolating switches S1, S2 between capacitors C1, C2 of the two half-bridge sub-modules. The capacitors C1, C2 are disposed in parallel between the half-bridge sub-modules and the isolating switches. Assuming that the power flows in the primary side of the DC-DC transformer and flows out from the secondary side; the half-bridge sub-module located on the primary side of the DC-DC transformer is referred to as a primary-side sub-module; and, the half-bridge sub-module located on the secondary side of the DC-DC transformer is referred to as a secondary-side sub-modules.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: March 22, 2022
    Assignee: Tianjin University
    Inventors: Bin Li, Weixin Zhang
  • Patent number: 11271480
    Abstract: A method, applied in a driving circuit including a bidirectional circuit coupled between a voltage source and a load, includes receiving a feedback signal from the load and an input signal; generating a plurality of pulse width modulation (PWM) signals according to the input signal and the feedback signal; driving the load by the bidirectional circuit according to the plurality of PWM signals such that the input signal and the feedback signal are substantially proportional to each other. The input signal is a time varying signal. The step of generating a PWM signal among the plurality of PWM signals according to the input signal and the feedback signal includes determining a difference according to the input signal and the feedback signal; and generating the PWM signal with a pulse width. The pulse width is determined according to the difference.
    Type: Grant
    Filed: July 20, 2021
    Date of Patent: March 8, 2022
    Assignee: xMEMS Labs, Inc.
    Inventor: Jemm Yue Liang
  • Patent number: 11264900
    Abstract: The present disclosure is directed to a pulse frequency modulation (PFM) control method for a boost converter and apparatus for carrying out the method. A boost converter includes an inductor and a transistor coupled thereto. A control circuit is arranged to control the transistor to cause current pulsed to be sourced through the inductor. When operating in a PFM mode, the control circuit may control the timing of pulses such that, at the beginning of a specified time period, current pulses may be sourced with no spacing between successive pulses. After a desired number of pulses have been sourced, no pulses are sourced for the remainder of the specified time period. Nevertheless, the number of pulses sourced over the time period corresponds to a desired average frequency of pulses.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: March 1, 2022
    Assignee: Apple Inc
    Inventors: Bogdan-Eugen Matei, Alessandro Molari, Fabio Ongaro, Giovanni Saccomanno, Hao Zhou
  • Patent number: 11258251
    Abstract: A protective arrangement includes an input configured to receive an input current from a current supply; one or more outputs configured to connect to one or more connection lines to supply current to one or more electric loads; one or more current supply paths arranged between the input and the one or more outputs; a first path circuit breaker and a second path circuit breaker in a series connection in a current supply path of the one or more current supply paths and configured to interrupt a current flow in the current supply path; and one or more setting units configured to set a trip current for at least one of the first path circuit breaker or the second path circuit breaker.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: February 22, 2022
    Assignee: Phoenix Contact GmbH & Co. KG
    Inventors: Michael Heinemann, Hartmut Henkel, Schmidt Olaf
  • Patent number: 11251717
    Abstract: An integrated silicon carbide rectifier circuit with an on chip isolation diode. The isolation diode can be a channel-to-substrate isolation diode or a channel to channel isolation diode. the circuit teaches an integrated diode rectification circuit for use with a two phase center tap transformer having a first voltage output, a second voltage output, and a center tap output with a single chip having a first half-wave rectifier connected to the first voltage output, a second half-wave rectifier connected to the second voltage output, and a floating substrate connection connected to the center tap output and an on chip first channel-to-substrate isolation diode electrically connected between the first half-wave rectifier and the floating substrate.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: February 15, 2022
    Inventors: Matthew Barlow, James A. Holmes
  • Patent number: 11251704
    Abstract: A single-inductor, multiple-output, DC-DC converter has regulation circuitry that controls switches to alternately charge at least two capacitors associated with at least two DC output voltages via the single inductor from a DC input port. The regulation circuitry determines whether the DC-DC converter is operating in continuous conduction mode (CCM) or discontinuous conduction mode (DCM). In CCM mode, the regulation circuitry regulates the charging duty cycle for a first output voltage and generates the initial charging duty cycle for regulating each other output voltage by scaling the first output voltage duty cycle. In DCM mode, the regulation circuitry independently regulates the charging duty cycles for each output voltage and stores each duty cycle to be used for the next charging period for the same output voltage. The regulation circuitry detects and handles undershoot and overshoot conditions to accelerate recovery at the output ports.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: February 15, 2022
    Assignee: NXP USA, Inc.
    Inventors: Xiaowen Wu, Lei Tian
  • Patent number: 11251603
    Abstract: Systems and methods are provided for providing thermal protection to a power backplane printed circuit board. A distributed hotspot detection grid is included in the printed circuit board, the distributed hotspot detection grid comprising a plurality of passive temperature sensors spread across the printed circuit board to measure temperature increases. The plurality of passive temperature sensors are connected to a detection circuit for comparing signals from the passive temperature sensors to a reference signal. If the temperature increases on the PCB, electrical characteristics of at least one passive temperature sensor will change, resulting in a change of the input signal to the detection circuit. When the threshold is exceeded (indicating a potential short circuit or hotspot), the detection circuit outputs a shut down signal to the one or more power supplies connected to the of the backplane printed circuit board, to avoid catastrophic damage to the printed circuit board.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: February 15, 2022
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Vincent W. Michna, David G. Carpenter, Patrick Raymond
  • Patent number: 11239746
    Abstract: A two-stage converter, a method for starting the two-stage converter, an LLC converter, and an application system are provided. A controller of the LLC converter of the two-stage converter first controls a main circuit of the LLC converter to perform hiccup charging on a direct current bus of a later-stage converter at a preset interval, so that the direct current bus voltage of the later-stage converter gradually increases, until an auxiliary power supply of the later-stage converter starts to operate, to supply power to the controller of the later-stage converter. After the controller of the later-stage converter reports the detected direct current bus voltage, the controller of the LLC converter determines whether the output voltage of the LLC converter increases to a hiccup starting voltage. If so, the controller of the LLC converter controls the main circuit to operate in a hiccup voltage stabilization phase.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: February 1, 2022
    Assignee: Sungrow Power Supply Co. Ltd.
    Inventors: Tao Zhao, Fushuai Zhuang, Xinyu Wang, Jiacai Zhuang, Mingda Wang, Yuan Zhuang
  • Patent number: 11226646
    Abstract: An electronic device may include a main circuit including multiple sub-circuits powered by a direct-current (DC) power supply circuit. The main circuit has a main circuit current demand being a time-varying demand for a DC voltage-regulated supply current being a function of a number of the sub-circuits being active. The DC power supply circuit may include multiple DC voltage regulators to provide the main circuit with the supply current and a command decoding and power management circuit to control enablement of the voltage regulators. The command decoding and power management circuit may be configured to detect an instant value of the main circuit current demand and to selectively enable one or more of the voltage regulators based on the detected instant value.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: January 18, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Si Hong Kim, Ki-Jun Nam
  • Patent number: 11223279
    Abstract: An electronic converter comprises first and second electronic switches that are connected between positive input and output terminals, where an intermediate node between the first and second electronic switches represents a first switching node. Third and fourth electronic switches are connected between the positive output terminal and a negative input terminal, where an intermediate node between the third and fourth electronic switches represents a second switching node. A first terminal of a primary winding of a transformer is connected to the second switching node, and a capacitor and inductance are connected in series between a second terminal of the primary winding and the first switching node. Fifth and sixth electronic switches are connected between the positive output terminal and a negative output terminal, where a first terminal of the secondary winding is connected to an intermediate node between the fifth and sixth electronic switches.
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: January 11, 2022
    Inventor: Osvaldo Enrico Zambetti