Patents Examined by Sisay G Tiku
  • Patent number: 10845833
    Abstract: A buck voltage converter comprising a high side switch, a low side switch, a capacitor, an inductor, a gate driver circuit having outputs coupled to the gate terminal of the high side switch and the gate terminal of the low side switch, and a separate voltage regulator circuit that powers circuitry internal to the buck voltage converter. The voltage regulator circuit includes a multiplexer having a first multiplexer input coupled to the input voltage source, a second multiplexer input coupled to the buck output of the buck voltage converter, and one or more multiplexer control inputs to select which of the two multiplexer inputs is coupled to a multiplexer output and pass transistor having a first terminal coupled to the multiplexer output of the multiplexer and having a second terminal coupled to the regulator output of the voltage regulator.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: November 24, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Stefan Dietrich, Christian Harder, Emil Cioran
  • Patent number: 10840795
    Abstract: A driver for driving a power transistor, the driver having: a first transistor, and a second transistor; wherein (1) when the first transistor is turned on, the second transistor is simultaneously turned on, and wherein after the second transistor remains on for a first time period, the second transistor is turned off for a second time period during when a switching voltage at a second terminal of the power transistor is rising, and the second transistor is turned on after the second time period is over; and (2) when the first transistor is turned off, the second transistor is simultaneously turned off.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: November 17, 2020
    Assignee: Monolithic Power Systems, Inc.
    Inventor: James Nguyen
  • Patent number: 10840063
    Abstract: A power supply system controls the source impedance of a generator in real time utilizing two amplifiers having asymmetrical power profiles in reference to a nominal load impedance that are diametrically opposite in reference to the nominal load impedance. Variations in power profiles may be achieved by using different topologies for each of the amplifiers or implementing a phase delay network. The output power from the first and second amplifiers may be combined using a combiner circuit or device and the output power from the combiner is transmitted to a plasma load. The output power of each amplifier may be independently controlled to alter one or more characteristics of the output power signal provided by the individual amplifiers. By changing the ratio of the output power of the first amplifier to the output power of the second amplified, the source impedance of the generators may be varied in real time.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: November 17, 2020
    Assignee: Advanced Energy Industries, Inc.
    Inventors: Gennady Gurov, Michael Mueller, Zebulun Whitman Benham
  • Patent number: 10826396
    Abstract: An automatic bandwidth control system for any switching frequency of a power converter is provided. A pulse generator outputs a preset clock signal according to a comparing signal. A control circuit controls a first switch and a second switch according to frequencies of the preset clock signal and an external clock signal. A first current mirror is connected to an input voltage source and a first terminal of the first switch. A second comparator compares an output voltage of a second reference voltage source with an output voltage of the first current mirror to output the comparing signal. A second current mirror is connected to the input voltage source, an error amplifier and a first terminal of the second switch. A transconductance gain of the error amplifier is controlled by a current of the second current mirror to adjust a bandwidth of the power converter.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: November 3, 2020
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Cheng-Han Wu, Fu-Chuan Chen
  • Patent number: 10826288
    Abstract: A power circuit including a switching circuit and a soft start control circuit is provided. A first terminal of the switching circuit is configured to receive an input voltage. A control terminal of the switching circuit receives a control signal. A second terminal of the switching circuit is configured to provide an output voltage. The soft start control circuit generates the control signal according to the output voltage and a first reference voltage to control a turn-on state of the switching circuit. The soft start control circuit switches a slope of the control signal from a first slope to a second slope after the switching circuit is turned on and when a voltage value of the control signal is equal to a second reference voltage, wherein the first slope is less than the second slope to reduce an inrush current at the time when the switching circuit is turned on.
    Type: Grant
    Filed: September 8, 2019
    Date of Patent: November 3, 2020
    Assignee: Excelliance MOS Corporation
    Inventors: Ming-Hung Chien, Ching-Tsan Lee
  • Patent number: 10826395
    Abstract: A voltage converter includes a third switch element and a second energy storage element, and an energy storage circuit comprising a first switch element, a second switch element, and a first energy storage element. In a time period, the first switch element is in an on state, the second switch element and the third switch element are in an off state, and a voltage source coupled to the voltage converter charges the first energy storage element and the second energy storage element, and in a following time period, the first switch element is in an off state, the second switch element and the third switch element are in an on state, the first energy storage element and the second energy storage element discharge to a load coupled to the voltage converter.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: November 3, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD
    Inventors: Jun Song, Pengfei Wang
  • Patent number: 10819224
    Abstract: A power factor correction circuit can include: a power meter configured to measure a power factor at an input port; a switching-type regulator that is controllable by a switching control signal in order to adjust the power factor of an input AC power; an EMI filter disposed between the switching-type regulator and the input port; and a controller configured to generate the switching control signal to maximize the power factor by adjusting a current reference signal according to a measured power factor, where the current reference signal represents an expected inductor current of the switching-type regulator.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: October 27, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Chen Zhao, Zhaofeng Wang, Xiaodong Huang
  • Patent number: 10819249
    Abstract: Disclosed is a method for controlling phase currents of a plurality of three-phase inverters connected in parallel. The phase currents of each inverter are controlled by direct hysteresis current control wherein an actual current space vector for actual values of the phase currents of each inverter is maintained about a target current space vector within a hysteresis window. The measured current space vector of a first inverter is formed by all three phase currents of the first inverter. The actual current space vector of each additional inverter is formed from exactly two phase currents of the respective additional inverter under the proviso that all three phase currents of the additional inverters add up to zero. The selection of the two phase currents from which the actual current space vector is formed, is varied.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: October 27, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Harald Wiessmann, Bernd Dressel, Maximilian Schmitt
  • Patent number: 10819241
    Abstract: A converter for controlling power flows between three electricity networks with different operating voltages. The converter includes, in one implementation, three terminals and two converter cells. Each of the three terminals are configured to electrically contact-connect one of the three electricity networks. Each of the two converter cells includes a transformer having three converter cells. One of the terminals is connected to a series circuit of the converter cells. Another of the terminals is connected to a parallel circuit of the converter cells.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: October 27, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Dominik Bortis, Jannik Robin Schaefer, Johann W. Kolar
  • Patent number: 10809752
    Abstract: A technique for improving the stability of a voltage reference is provided. The implementation of technique is simple and elegant and does not involve a noise penalty. A compensation resistor is provided on one end of a string of resistors used to set a ?VBE in a PTAT cell and to set a gain applied to the PTAT cell voltage.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: October 20, 2020
    Assignee: Analog Devices International Unlimited Company
    Inventors: Jonathan Ephraim David Hurwitz, Gergely Toldi
  • Patent number: 10811962
    Abstract: A multi-level switching power converter includes a multi-level power stage circuit which converts an input power to an output power. The power stage circuit includes an inductor, a conversion capacitor and plural power switches. The controller circuit controls the multi-level power stage circuit and includes: a feedback pulse generator circuit which generates a trigger pulse; a first timer circuit and a second timer circuit which determine a first time period and a second time period respectively according to the trigger pulse; and an adjusting circuit which adjusts the first time period according to a difference between the voltage across the conversion capacitor and a reference voltage such that an average of the voltage across the conversion capacitor is substantially equal to a level of the reference voltage.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: October 20, 2020
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Yung-Chun Chuang, Tsung-Wei Huang
  • Patent number: 10802519
    Abstract: One or more of the present embodiments allows multiple controllers to be automatically configured as a single or multi-rail voltage regulator system using a local bus that can communicate between controllers with a minimal set of pinstraps. This allows the system to be configured with a reduced set of configuration pins and without the need for stored configurations in the controller's own memory or configurations performed by an external host.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: October 13, 2020
    Assignee: Renesas Electronics America Inc.
    Inventor: Michael Lyndon Payne
  • Patent number: 10797598
    Abstract: According to an aspect of one or more exemplary embodiments, there is provided a constant on-time controller for a buck converter with calibrated ripple injection in continuous conduction mode. The constant on-time controller may include a pulse width modulator (PWM) comparator that generates an on-time request, an error amplifier that regulates an average feedback voltage to an internal reference voltage, and passes a feedback node ripple signal to an input of the PWM comparator, an on-time generator that outputs an on-time signal that controls an on-time of the buck converter based on the on-time request, a MOSFET driver that drives the buck converter based on the output of the on-time generator, and an injection signal generator coupled to the on-time generator, wherein the injection signal generator may include a first switch and a second switch, a fixed signal generator, and a bias current source.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: October 6, 2020
    Assignee: Microchip Technology Incorporated
    Inventors: Venkata Murali Krushna Malla, Surya Prakash Rao Talari, Ioan Stoichita, Matthew Weng
  • Patent number: 10797582
    Abstract: An apparatus comprises: a voltage converter, a first switch, a second switch, and a controller. The voltage converter includes a combination of a primary winding and an auxiliary primary winding magnetically coupled to a secondary winding. The auxiliary primary winding is operable to generate a feedback voltage signal. The secondary winding is operable to receive energy from the primary winding to produce an output voltage to power a load. The controller controls switching operation of the first switch and the second switch to control a flow of current through the primary winding. The controller is further operable to: i) via a feedback voltage signal from the auxiliary primary winding, monitor a flow of current through a body diode of the second switch, and ii) control subsequent activation of the first switch to an ON state based on the monitored flow of current through the body diode of the second switch.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: October 6, 2020
    Assignee: Infineon Technologies Austria AG
    Inventor: Alfredo Medina-Garcia
  • Patent number: 10797604
    Abstract: An LLC converter includes a switch module, a transformer, an output circuit, a resonant circuit and a safety capacitor. The switch module is connected between an input voltage and a ground. The transformer has a primary side winding and at least one secondary side winding. The output circuit is connected between the at least one secondary side winding and a load. The resonant circuit is coupled between the primary side winding and the switch module and includes at least one leakage inductor. The safety capacitor is connected between the at least one leakage inductor and the switch module.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: October 6, 2020
    Assignee: ASIAN POWER DEVICES INC.
    Inventors: Tsung-Liang Hung, Yeu-Torng Yau
  • Patent number: 10790764
    Abstract: A power conversion device includes an MMC-type power conversion circuit and a central controller. The central controller limits an active power command value and a reactive power command value to a value corresponding to an active power limit value and a value corresponding to a reactive power limit value, respectively, and controls an operation of the power conversion circuit according to the limited active power command value and the limited reactive power command value. The central controller includes: an index value calculation unit configured to calculate an index value that shows an extent of a variation among voltages of energy storage devices included in a plurality of converter cells; and a limiter controller configured to change the active power limit value to a value smaller than the active power limit value when the index value exceeds a threshold value.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: September 29, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tomohiro Adachi, Masahiro Hario, Noriyuki Imada
  • Patent number: 10790740
    Abstract: Techniques for improving efficiency of a switched-capacitor voltage regulator are provided. In an example, a switched-capacitor voltage regulator can include a switched-capacitor network having multiple gain configurations, a clock configured to switch capacitors of the switched-capacitor network between a charge state and a discharge state to provide a scaled output voltage, and a controller configured to select a capacitor configuration associated with a gain of the multiple gain configurations to provide the scaled output voltage within a desired output voltage range while continuously switching the capacitor configuration, and to interrupt switching of the capacitor configuration to permit an output voltage of the switched-capacitor voltage regulator to fall below the scaled output voltage but to remain above a lower limit of the desired output voltage range to save power by reducing losses due to the switching.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: September 29, 2020
    Assignee: Analog Devices Global Unlimited Company
    Inventors: Amit Kumar Singh, Sriram Ganesan, Miguel A. Ruiz, Jose Tejada
  • Patent number: 10770984
    Abstract: A drive circuit is connected to a gate terminal of an FET connected to a DC power supply to be transformed and controlled to be turned on or off, and applies a voltage to the gate terminal to turn on the FET, the FET including a drain terminal to which a current is input, a source terminal that outputs the current input from the drain terminal, and the gate terminal that controls the current flowing from the drain terminal to the source terminal. A reverse bias circuit includes a capacitor connected to the source terminal of the FET, and a coil having one end connected between the drive circuit and the gate terminal and the other end connected between the capacitor and the source terminal.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: September 8, 2020
    Assignee: YAZAKI CORPORATION
    Inventor: Satoshi Ito
  • Patent number: 10756621
    Abstract: A voltage regulator provides an output voltage and an output current. The output voltage decreases with an increase of the output current when the output current is lower than a current breaking point, and the output voltage is maintained when the output current reaches the current breaking point.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: August 25, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Binci Xu, Yongliang Wang, Tao Zhao, Lijie Jiang
  • Patent number: 10756615
    Abstract: A power supply conversion circuit is provided, which includes: a first voltage clamping module configured to decrease an input voltage to a preset low voltage; a boost module configured to increase the input voltage or the preset low voltage to a target voltage; a second voltage clamping module configured to maintain the target voltage within a preset voltage range; a filter module configured to filter out ripples in the target voltage; and at least one output module, each of which is configured to supply power to a load. Compared with a conventional LDO integrated circuit, the circuit can provide multiple output power supplies, and it is only required to additionally arrange one field effect transistor for one more output power supply. Therefore, the power supply conversion circuit has a simple structure, is expandable easily and is applicable to an analog integrated circuit requiring multiple output power supplies.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: August 25, 2020
    Assignee: Shanghai Awinic Technology Co., LTD
    Inventors: Xucheng Luo, Jianwei Hu, Jiantao Cheng