Patents Examined by Jye-June Lee
  • Patent number: 11515799
    Abstract: A resonant converter controller circuit is provided. Each period in drive control has a drive time interval and a pause time interval for driving/pausing the resonant converter. The resonant converter controller circuit includes a first oscillating means for generating a clock signal, a second oscillating means for generating a sawtooth wave signal, a third oscillating means for generating a rectangular wave signal, comparison means for outputting a comparison signal indication the rive time interval, by comparing the sawtooth wave signal with a threshold signal, which is generated based on a difference voltage between an output voltage of the resonant converter and a target voltage, and which indicates a ration of the drive time interval to the pause time interval, and a logical operation means for generating a drive control signal based on the comparison signal and the rectangular wave signal to drive and control the resonant converter.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: November 29, 2022
    Assignee: OMRON CORPORATION
    Inventor: Takeshi Uematsu
  • Patent number: 11515781
    Abstract: A current source inverter, including: a first switching cell including at least first and second power switches coupling a same first input node of the inverter respectively to first and second output nodes of the inverter; and a circuit of protection against a placing in open circuit of an input current source of the inverter.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: November 29, 2022
    Assignee: Commissariat à l'Énergie Atomique et aux Énergies Alternatives
    Inventors: Gaëtan Perez, Anthony Bier, Stéphane Catellani
  • Patent number: 11509225
    Abstract: This power supply IC is a semiconductor integrated circuit device serving as a main part for controlling a switching power supply and is formed by integrating a feedback resistor and an output feedback control unit on a single semiconductor substrate, said feedback resistor generating a feedback voltage by dividing the output voltage of the switching power supply (or the induced voltage appearing across an auxiliary winding provided on the primary side of a transformer included in an insulation-type switching power supply), said output feedback control unit performing output feedback control of the switching power supply in accordance with the feedback voltage. The feedback resistor is a polysilicon resistor having a withstand voltage of 100 V or more. A high-voltage region having higher withstand voltage in the substrate thickness direction than the other region is formed in the semiconductor substrate, and the feedback resistor is formed on the high-voltage region.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: November 22, 2022
    Assignee: Rohm Co., Ltd.
    Inventors: Satoru Nate, Yoshinori Sato
  • Patent number: 11496037
    Abstract: A power supply having a bidirectional gate driving impulse transformer. The power supply includes a transformer, a first Buck converter, the bidirectional gate driving impulse transformer, a primary side controller, a secondary side controller, a first optocoupler, and a second optocoupler; the transformer voltage-transforms a power input from a power inlet and generates an output voltage; the first Buck converter bucks the power input from the power inlet and generates a power voltage; the bidirectional gate driving impulse transformer is powered by either the output voltage or the power voltage; the primary side controller is powered by the power voltage, and the secondary side controller is powered by the output voltage; wherein the bidirectional gate driving impulse transformer drives the transformer according to either a primary side control signal from the primary side controller or a secondary side control signal from the secondary side controller.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: November 8, 2022
    Assignee: ACBEL POLYTECH INC.
    Inventor: Chia-Chih Hsiang
  • Patent number: 11487312
    Abstract: A low dropout voltage regulator that in one configuration provides a drive signal to regulate an output voltage in response thereto includes an error amplifier, an intermediate amplifier, a buffer amplifier, and a compensation network. The error amplifier has a first input for receiving a reference voltage, a second input for receiving a feedback signal representative of the output voltage, a first output, and a second output. The intermediate amplifier has a first input coupled to the first output of said error amplifier, a second input coupled to the second output of the error amplifier, and an output. The buffer amplifier has a first input coupled to the output of the intermediate amplifier, and an output for providing the drive signal. The compensation network has a first terminal coupled to the first input of the intermediate amplifier, and a second terminal coupled to the output of the intermediate amplifier.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: November 1, 2022
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Paolo Migliavacca
  • Patent number: 11482922
    Abstract: An electronic circuit comprises a first and second comparators and a first summer. The first comparator is configured to perform a first comparison to compare a first current reference signal with a signal representing an input current and configured to generate a first current error signal based on the first comparison. The second comparator is configured to perform a second comparison to compare a second current reference signal with the signal representing the input current and configured to generate a second current error signal based on the second comparison. The first summer is configured to adjust a first summer input error signal based on a second summer input error signal. The first summer input error signal is based on the first current error signal, and the second summer input error signal is based on the second current error signal.
    Type: Grant
    Filed: February 4, 2021
    Date of Patent: October 25, 2022
    Assignee: Astec International Limited
    Inventor: Yancy Fontanilla Boncato
  • Patent number: 11482940
    Abstract: A high-efficiency LLC resonant converter is disclosed. During a normal operation of the LLC resonant converter, an error amplifier unit generates a modulated voltage signal to a first control unit after receives a data of voltage difference from a detection unit, and then the first control unit calculates an immediate load rate based on the modulated voltage signal. Subsequently, the second control unit receives a first adjustment signal that is outputted by the first control unit, so as to correspondingly generate a switch element controlling signal to a switch element of a DC power supplying unit of the LLC resonant converter, thereby achieving an output voltage modulation of the DC power supplying unit. As such, the LLC resonant converter is controlled to exhibit a conversion efficiency of at least 98% in case of working at any one load state.
    Type: Grant
    Filed: January 20, 2021
    Date of Patent: October 25, 2022
    Assignee: CHANNEL WELL TECHNOLOGY CO., LTD.
    Inventor: Yi-An Pan
  • Patent number: 11476765
    Abstract: An illustrative example embodiment of a buck-boost converter includes at least three input/output ports, at least three sets of switches, and at least two ripple current limiters. One of the sets of switches is associated with each of the input/output ports. Each of the ripple current limiters is associated with a respective one of the sets of switches between the associated set of switches and another one of the sets of switches.
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: October 18, 2022
    Assignee: OTIS ELEVATOR COMPANY
    Inventor: Ben Guo
  • Patent number: 11469679
    Abstract: In a power conversion device, cable connection positions of connections in which a plurality of bus bars is respectively connected to external line cables are non-overlapping with each other as viewed from a side on which the external line cables are pulled out.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: October 11, 2022
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Keita Koshii
  • Patent number: 11463018
    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: May 19, 2020
    Date of Patent: October 4, 2022
    Assignee: Solaredge Technologies Ltd.
    Inventors: Tzachi Glovinsky, Ilan Yoscovich, Guy Sella, Milan Ilic, Jaya Deepti Dasika
  • Patent number: 11460875
    Abstract: A bandgap circuit generates a substantially constant output voltage. The bandgap circuit can be integrated with other circuits of an integrated circuit and its absolute output voltage value can be calibrated to a desired voltage level. As such, the variation in absolute voltage levels which may be caused by variation in devices' parameters subject to different fabrication processes is minimized or substantially eliminated. The bandgap circuit includes a bandgap core that generates a temperature independent voltage. The bandgap circuit also includes a resistor ladder that is coupled in parallel to the bandgap core and scales the temperature independent voltage into voltage levels proportional to the temperature independent voltage. An output switch of the bandgap circuit selects the voltage level on the resistor ladder that is substantially equal to a desired voltage level. The bandgap circuit also includes a current mirror that outputs a proportional to absolute temperature current.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: October 4, 2022
    Assignee: MARVELL ASIA PTE LTD.
    Inventors: Nicola Codega, Fabio Giunco, Giovanni Cesura
  • Patent number: 11456667
    Abstract: A system includes an input voltage node configured to provide an input voltage. The system also includes a load and a switching converter coupled between the input voltage node and the load. The switching converter is configured to provide an output voltage to the load based on the input voltage. The switching converter includes gate driver circuitry and a comparator coupled to the gate driver circuitry. The switching converter also includes a constant ripple injection circuit coupled to the comparator. The constant ripple injection circuit is configured to provide a positive current sense signal and a negative current sense signal to the comparator based on the input voltage and the output voltage.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: September 27, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Liang Zhang, Weibing Jing, Dan Li, Qi Yang
  • Patent number: 11431249
    Abstract: A power converter circuit that includes a switch node coupled to a regulated power supply node via an inductor is configured to regulate a voltage level of a power supply node using a particular one of multiple available operating modes. In response to receiving a command to reduce the voltage level of the power supply node, the power converter circuit begins to reduce the voltage level of the power supply node, while autonomously selecting different ones of available operating modes. The power converter circuit may compare to the voltage level of the power supply node to boundary levels and select a different operating mode when the voltage level of the power supply node exceeds one of the boundaries. By switching operating modes during the negative slew of the voltage level of the power supply node, the power converter may maintain a target efficiency during the reduction in voltage.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: August 30, 2022
    Assignee: Apple Inc.
    Inventors: Alberto Alessandro Angelo Puggelli, Ofir Gilad, Floyd L. Dankert, Hubert Attah, Sanjay Pant, Shawn Searles, Georg Diebel
  • Patent number: 11424686
    Abstract: A converter with half-bridge circuit is disclosed. The converter includes a voltage source, a first switch, a second switch, a first resonant capacitor, a second resonant capacitor, a resonant inductor, a transformer and a control unit. The control unit is configured to generate a first control signal for turning on/off the first switch and a second control signal for turning on/off the second switch. When the half-bridge converter is turned on or reopened, a first duty rate of a first pulse being the first pulse of the first control signal for turning on the first switch is less than 50%, and a second duty rate of a second pulse being the first pulse of the second control signal for turning on the second switch after the end of the first pulse of the first control signal is greater than 50%.
    Type: Grant
    Filed: November 5, 2020
    Date of Patent: August 23, 2022
    Inventors: En-Yong Yang, I-Hung Lamn, Yu-Jen Chen, Chin-Pin Chen
  • Patent number: 11416015
    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: July 1, 2020
    Date of Patent: August 16, 2022
    Assignee: Texas Instruments Incorporated
    Inventors: James Murdock, Danielle Griffith, Per Torstein Roine
  • Patent number: 11398768
    Abstract: A semiconductor module arrangement includes an input stage including a first output terminal and a second output terminal, wherein a first inductive element is coupled to the first output terminal; an output stage including at least one first controllable semiconductor element, a third input terminal coupled to the first inductive element such that the first inductive element is coupled between the first output terminal and the third input terminal, a fourth input terminal coupled to the second output terminal, a third output terminal, and a fourth output terminal; a second controllable semiconductor element and a first capacitive element coupled in series and between a first common node coupled between the first inductive element and the third input terminal, and a second common node coupled between the second output terminal and the fourth input terminal; and a first diode element coupled in parallel to the second controllable semiconductor element.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: July 26, 2022
    Inventor: Michael Schlueter
  • Patent number: 11398769
    Abstract: A semiconductor device includes an upper switching element, a lower switching element, an upper capacitor, and a lower capacitor. The upper switching element is formed by a wide-gap semiconductor and includes a first upper terminal, a second upper terminal, and an upper control terminal. The lower switching element is formed by a wide-gap semiconductor and includes a first lower terminal, a second lower terminal, and a lower control terminal. The upper capacitor is provided between the first upper terminal and the upper control terminal separately from the upper switching element. The lower capacitor is provided between the first lower terminal and the lower control terminal separately from the lower switching element. The second upper terminal and the first lower terminal are electrically connected.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: July 26, 2022
    Assignee: ROHM CO., LTD.
    Inventor: Hirotaka Otake
  • Patent number: 11387734
    Abstract: Aspects of the disclosure provide for a circuit. In at least some examples, the circuit includes a high-side power transistor, a low-side power transistor, a first transistor, a second transistor, and a third transistor. The high-side transistor is adapted to couple between an input node and a switch node. The low-side transistor is coupled between the switch node and ground. The first transistor is adapted to couple between a first node and the switch node. The second transistor is coupled between the first node and an output node. The third transistor is coupled between the first node and ground.
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: July 12, 2022
    Assignee: Texas Instruments Incorporated
    Inventors: Riazdeen Buhari, Roy Alan Hastings, Nghia Trong Tang
  • Patent number: 11381151
    Abstract: A driving circuit for driving a synchronous rectifier device. The driving circuit may include a controllable charging circuit and a slope sensing circuit. The slope sensing circuit may sense whether an abrupt rising change in a voltage drop from a sensing terminal to a reference ground terminal of the driving circuit is occurring, and provide a slope sensing signal in response to a rising edge of the abrupt rising change in the voltage drop. The controllable charging circuit may receive the slope sensing signal and provide a charging current to a supply terminal of the driving circuit in response to each rising edge of the abrupt rising change in the voltage drop.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: July 5, 2022
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Jiayou Ye, Yuedong Chen, Hui Li
  • Patent number: 11381169
    Abstract: The technology described herein is directed to a DC input power supply unit with an auxiliary boost control circuit (or controller) that facilitates continuous supply of power to a standby output load of the power supply unit in a bootloader mode. More specifically, the auxiliary boost circuit (or controller) is configured to assume control of a primary power boost stage from a primary controller in a bootloader mode so that the power supply unit can continue to supply power to the standby output with a protection function regardless of the state of the power supply unit or primary controller.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: July 5, 2022
    Assignee: Astec International Limited
    Inventors: Chih-hao Hsu, Chang-Chieh Yu, Carl Walker, Chun-Wei Chang, Po-Tso Chen