Patents Examined by Jye-June Lee
  • Patent number: 10819074
    Abstract: According to an aspect, an overvoltage protection circuit includes a bias current generator configured to generate a bias current, and a current comparator configured to receive the bias current and a voltage associated with a data terminal of a connector. The current comparator includes a transistor. The transistor is configured to activate based on a level of the voltage associated with the data terminal. The current comparator is configured to compare a current of the transistor with the bias current. The overvoltage protection circuit includes an output circuit configured to generate an overvoltage protection signal in response to the current of the transistor being greater than the bias current.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: October 27, 2020
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Eric Wu, WeiMing Sun, Peng Zhu
  • Patent number: 10775826
    Abstract: Embodiments of the present disclosure provide a circuit structure including: a first tap node, a first operational element coupled to the first tap node, the first operational element including at least one transistor having a back-gate, a second tap node coupled to the first operational unit, a second operational element coupled to the second tap node, the second operational element including at least one transistor having a back-gate, and a first back-gate biasing voltage regulator coupled to the second operational element and the first tap node. The first back-gate biasing voltage regulator is configured to supply the at least one transistor of the second operational element with a back-gate biasing voltage level that is different than a voltage level available to the second operational element from the second tap node.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: September 15, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Ulrich G. Hensel, Jurgen Faul, Arif A. Siddiqi
  • Patent number: 10777863
    Abstract: There is provided a power converter unit that can include an inverter and a plurality of batteries. The power converter unit can include a battery energy storage system (BESS) and an inverter. The BESS and the inverter can share at least one protection circuit.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: September 15, 2020
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LTD
    Inventors: Robert Gregory Wagoner, John S Harrison, Lukas Mercer Hansen
  • Patent number: 10770965
    Abstract: This disclosure describes a flyback converter with a series-parallel mode (SPM) active clamp. The active clamp, coupled in parallel with the primary coil, may include a clamp switch, two or more snubber capacitors, and associated diodes. The active clamp may be configured to absorb and retain the leakage energy from the leakage inductance of the flyback converter. The clamp switch may be turned on selectively as the primary switch approaches one of a plurality peak values to adjust frequencies of the switching devices. With the active clamp circuit, the flyback converter may first re-capture the leakage energy in the active clamp circuit and then recover it back to the power source.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: September 8, 2020
    Assignee: Apple Inc.
    Inventors: Marco A. Davila, Joao L. Andres, Bogdan T. Bucheru, Vijay Phadke
  • Patent number: 10756648
    Abstract: A multiphase inverter for an electric vehicle drive has a plurality of drivers to provide drive signals to respective gate loops of upper and lower transistors in the phase legs. A transformer has a secondary winding in a first gate loop of a first transistor in one phase leg and a primary winding connecting a Kelvin-emitter of the first transistor to a Kelvin-emitter of a second transistor in the other phase leg. Switching transients of transistors are shortened because when gate signal is toggled to change a conduction state of a transistor in a first phase leg, a rate of current change in the first leg is sensed in a transformer primary winding connected across a stray inductance of the first leg. A voltage proportional to the sensed rate is added to the gate signal via a transformer secondary winding, thereby increasing a common source inductance of the transistor.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: August 25, 2020
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Zhuxian Xu, Chingchi Chen
  • Patent number: 10756618
    Abstract: A regulator device includes a first switch, a second switch, a protecting circuit, and a driving circuit. The first switch is configured to receive power supply voltage. One terminal of the second switch and the first switch are coupled at a node. The other terminal of the second switch is coupled to ground. The protecting circuit is coupled to the node, and outputs at least one protecting signal according to the turn on/off state of the first switch and the second switch and the voltage of the node. The driving circuit is coupled to the first switch, the second switch, and the protecting circuit, and turns off the first switch or the second switch according the at least one protecting signal.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: August 25, 2020
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventors: Wei-Wen Ou, Shih-Chieh Chen, Chien-Sheng Chen
  • Patent number: 10756636
    Abstract: A power control device that acts as a principal controlling agent in an isolating switching power supply has a controller configured to monitor a first output detection signal commensurate with a direct-current output voltage to a load and a second output detection signal commensurate with the difference between the direct-current output voltage and its target value switch among a plurality of operating modes with varying power consumption according to the results of monitoring of the two output detection signals. The power control device may instead have a peak current switch configured to raise the peak current value of a primary current passing in an output switch on detecting a light load.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: August 25, 2020
    Assignee: Rohm Co., Ltd.
    Inventors: Yoshinori Sato, Satoru Nate, Yuta Shiroishi
  • Patent number: 10749428
    Abstract: A switched mode power supply (SMPS) having a DC bus supplied by an power input, a first transformer with a first primary connected to the DC bus, and a second transformer with a second primary connected in series with the first primary, a first switching device connected in parallel with the second primary, a second switching device connected in series between the first switching device and a circuit ground. The SMPS also includes a snubber and hold up circuit having a diode and a holdup capacitor connected in parallel with the second switching device. The SMPS also includes a first control circuit connected to the first switching device and a second control circuit connected to the second switching device, wherein the output of the first control circuit is based at least in part on the output of the second control circuit.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: August 18, 2020
    Assignee: HAMILTON SUNSTRAND CORPORATION
    Inventor: Rajkumar Sengodan
  • Patent number: 10734907
    Abstract: Based on a control voltage outputted by a secondary-side control circuit and a drain voltage of a second transistor that has a drain electrode connected to a primary winding of a transformer and performs switching operations based on a gate voltage, a control voltage generating circuit of a synchronous rectifier circuit generates the gate voltage of a first transistor. The gate voltage turns off the first transistor irrespective of the control voltage at timing where the drain voltage falls from a first value to a second value.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: August 4, 2020
    Assignee: FUJITSU LIMITED
    Inventor: Tatsuya Hirose
  • Patent number: 10727756
    Abstract: Provided is a circuit module having less noise, and an inverter using the same. The circuit module 2 is provided with a circuit part 4, an input terminal part 5, an output terminal part 6, and a support 21. The circuit part 4 includes a conversion circuit, and a switch circuit. The output terminal part 6 includes a first output terminal 61 and a second output terminal 62 that are respectively electrically connected to a pair of output points of the circuit part 4. The arrangement of the output terminal part 6 on one surface of the support 21 is such that the first output terminal and the second output terminal are positioned around the circuit part 4 on the same side with respect to the circuit part 4, or the first output terminal and the second output terminal are adjacent to one another around the circuit part 4.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: July 28, 2020
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Shusaku Goto, Yusuke Iwamatsu, Akira Yoshitake
  • Patent number: 10727760
    Abstract: A power conversion circuit is provided. The power conversion circuit includes a bridge circuit connected between power input terminals, a drive circuit supplied with power from a DC power source via the power input terminals, a boost circuit for, when the DC power source is reversely connected, starting up and supplying power to a control circuit, and a reverse voltage detection circuit for detecting a reverse voltage generated when the DC power source is reversely connected.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: July 28, 2020
    Assignee: DENSO CORPORATION
    Inventor: Takashi Imura
  • Patent number: 10719096
    Abstract: A reference generator provides a reference output voltage that is continuously available while providing certain efficiencies of a duty-cycled voltage regulator. The reference output voltage is generated by a sample-and-hold circuit that is coupled to a voltage regulator. On command, the sample-and-hold circuit samples a low dropout voltage regulator that may be referenced by a bandgap circuit. During hold periods of the sample-and-hold circuit, the voltage regulator, in particular the bandgap circuit, may be disabled in order to conserve power. A sample cycle by the sample-and-hold circuit may be triggered by a signal received from a configurable finite state machine. The reference generator is effectively duty cycled in a manner that conserves available battery power, while still providing a constant reference output that is always available. The reference generator is especially suited for low-power, battery operated applications.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: July 21, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: James Murdock, Danielle Griffith, Per Torstein Roine
  • Patent number: 10720838
    Abstract: Embodiments provide forced-burst voltage regulation for burst mode direct-current-to-direct-current (DC-DC) converters in integrated circuits. The DC-DC converter generates an output voltage and operates in a burst mode to raise the output voltage to a threshold voltage. A controller is coupled to the DC-DC converter. In operation, the DC-DC converter is configured to perform the burst mode based upon a low-voltage detection for the output voltage. The DC-DC converter is further configured to perform the burst mode when a force-burst command is asserted by the controller to the DC-DC converter regardless of a state for the low-voltage detection. For one embodiment, the force-burst command is asserted as a burst control signal from the controller to the DC-DC converter to generate a long quiet period for sensitive actions. For another embodiment, the force-burst command is asserted using enable and refresh control signals to facilitate low-power operation.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: July 21, 2020
    Assignee: NXP B.V.
    Inventors: Jitendra Prabhakar Harshey, Olivier Trescases, Edevaldo Pereira Da Silva Junior, Stefano Pietri, Jurgen Geerlings, Hendrik Johannes Bergveld
  • Patent number: 10700593
    Abstract: A step-down chopper circuit having a filter reactor includes: a capacitor series circuit having a first capacitor and a second capacitor; a first series circuit having a semiconductor switching element and a diode, which is connected in parallel with the first capacitor, and a second series circuit having a diode and a semiconductor switching element, which is connected in parallel with the second capacitor; a chopper reactor whose one end is connected to a connection point of the first series circuit; and an output capacitor connected between the other end of the chopper reactor and a connection point of the second series circuit, in which a bypass current path with respect to the capacitor, which is configured to bypass a short-circuit current, is formed when one of the first series circuit and the second series circuit becomes a short-circuit state.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: June 30, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Motoyoshi Kubouchi
  • Patent number: 10700618
    Abstract: An apparatus includes a DC-to-AC converter comprising a first output terminal and a second output terminal. The apparatus also includes a DC-to-DC converter comprising a third output. The DC-to-AC converter is configured to receive a DC input voltage from a DC power source, and to produce a first alternating output voltage at the first output terminal, and a second alternating output voltage at the second output terminal. The DC-to-DC converter is configured receive a DC input voltage from the DC power source, and to step down the DC input voltage at the third output.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: June 30, 2020
    Assignee: Solaredge Technologies Ltd.
    Inventors: Tzachi Glovinsky, Ilan Yoscovich, Guy Sella, Milan Ilic, Jaya Deepti Dasika
  • Patent number: 10684637
    Abstract: a reference voltage generating circuit that includes a bandgap reference voltage generating circuit main body (10) configured to generate a substantially constant reference voltage at room temperature, a high temperature correction circuit (30) configured to increase a reference voltage generated by the reference voltage generating circuit main body at a high temperature by supplying a high temperature correction current that increases as the temperature increases to the resistor, a low temperature correction circuit (40) configured to increase a reference voltage generated by the reference voltage generating circuit main body at a low temperature by supplying a low temperature correction current that increases as the temperature decreases to the resistor, and a bias circuit (20) configured to generate a bias voltage according to the temperature, so as to control the high temperature correction current and the low temperature correction current at the same time.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: June 16, 2020
    Assignee: NEW JAPAN RADIO CO., LTD.
    Inventor: Haruhiko Yoshida
  • Patent number: 10680528
    Abstract: Controllers, systems and methods are presented related to resonant converters. In case of a load imbalance between the resonant converters, an on-time of a synchronous rectifier switch of one of the resonant converters is reduced.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: June 9, 2020
    Assignee: Infineon Technologies Austria AG
    Inventors: David Meneses Herrera, Matteo-Alessandro Kutschak
  • Patent number: 10673317
    Abstract: A soft-switching and low input current ripple inverter circuit is disclosed. It includes two paralleled dual-switch forward inverter circuits with a single transformer, two clamping diodes, and one coupling capacitor. It has voltage-clamping function on the switches with a lossless snubber at the turn-off instant and provides enough leakage energy to achieve zero-voltage switching operation with low input current ripple feature. Two set of the driver signals with 180 phase shift each other are used to control the switches of said first and second dual-switch forward inverters, respectively. Each set of driver signals includes one PWM signal (D) and one near 50% duty cycle driver signal. Employing the proposed inverter circuit, the switch's turn-on voltage can be reduced to half input voltage compared to its prior art circuits. Consequently, the switching losses are thus reduced and efficiency is improved, especially in light-load operation.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: June 2, 2020
    Inventor: Ching-Shan Leu
  • Patent number: 10669989
    Abstract: Disclosed herein are an apparatus for driving converters in a wind power generation system, an apparatus for controlling converters in a wind power generation system, an apparatus for driving switching element modules in a wind power generation system, and an apparatus for controlling switching element modules in a wind power generation system. The apparatus for driving converters in a wind power generation system includes a converter control unit configured to drive a plurality of converters connected in parallel between a generator and a grid, wherein the converter control unit sequentially drives the converters one by one when output power of the grid increases and sequentially stops the operations of the converters one by one when output power of the grid decreases.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: June 2, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Sanghoey Lee, Jeonghoon Lee
  • Patent number: 10666159
    Abstract: A single-phase converter control method and apparatus, includes calculating on a voltage corresponding to a first level output by a single-phase converter, a voltage corresponding to a second level output by the single-phase converter, and a voltage reference value about the voltage corresponding to the first level and the voltage corresponding to the second level to obtain a common-mode modulated-wave change rate of the single-phase converter, where the first level is a direct-current-side positive-bus level, and the second level is a direct-current-side negative-bus level, calculating on a first-phase initial modulated wave of the single-phase converter, a second-phase initial modulated wave of the single-phase converter, and the common-mode modulated-wave change rate to obtain a common-mode modulated wave of the single-phase converter, and calculating on the first-phase initial modulated wave, the second-phase initial modulated wave, and the common-mode modulated wave to obtain a pulse width modulated wave
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: May 26, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Fangcheng Liu, Kai Xin, Yunfeng Liu