Starting Circuits Patents (Class 323/901)
  • Patent number: 10686360
    Abstract: A power control circuit includes a detection device, a first control device, and a second control device. When the detection signal is changed from lower to higher than the first voltage, the first control device's output is changed to the second potential. When the detection signal is changed from higher to lower than the second voltage, the first control device's output is changed to the first potential. When the detection signal is changed from lower to higher than the third voltage, the second control device's output is changed to the fourth potential. When the detection signal is changed from higher to lower than the fourth voltage, the second control device's output is changed to the third potential. According to the first or second potentials, the circuit device turns on/off the first function. According to the third or fourth potentials, the circuit device turns on/off the second function.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: June 16, 2020
    Assignee: QUANTA COMPUTER INC.
    Inventor: Hsin-Chih Kuo
  • Patent number: 10581317
    Abstract: A device for supplying electric power to an electronic component, including a DC-to-DC converter able to operate using pulse width modulation with high states and low states, with an input and an output, the output being intended to supply power to the electrical component; and a protective circuit connected to the input of the DC-to-DC converter, with a storage capacitive component connected to a diode for protecting against polarity reversals. The protective circuit furthermore includes a bypass for bypassing the protective diode so as to allow the storage capacitive component to discharge during the low states of the pulse width modulation.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: March 3, 2020
    Assignee: VALEO VISION
    Inventors: Bernard Guillot, Irantzu Jauregi
  • 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: 10554148
    Abstract: Provided is a premagnetization device for a converter system that is connectable to a three-phase electrical grid that has a three-phase power transformer, a converter connected to the power transformer and a circuit-breaker on the grid side of the power transformer. The premagnetization device is premagnetizes the power transformer in a state isolated from the grid. The premagnetization device uses a single-phase reference voltage (Uref) that has a fixed relationship to the grid voltage (Ugrid) with regard to the voltage parameters, in order to generate, based on the measured instantaneous reference voltage (Uref) and the known fixed parameter relationships, by actuating the converter, a three-phase alternating voltage synchronous to the grid voltage (Ugrid) on the grid side of the power transformer.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: February 4, 2020
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LIMITED
    Inventors: Thomas Brueckner, Michael Bernhard Kocur, Peter Nadolny
  • Patent number: 10545524
    Abstract: A method and system includes receiving, at a computing device including a design tool application, design parameters indicative of a plurality of power supply loads to be powered. The method further includes generating power supply solutions that do not include multi-channel voltage regulators and generating power supply solutions that do include multi-channel voltage regulators. The method also includes ranking all power supply solutions and providing the ranked power supply solutions to a user.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: January 28, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Dien Mac, Satyanandakishore V. Vanapalli, Jeffrey Perry, Wanda C. Garrett, Jonathan J. Arzadon
  • Patent number: 10498246
    Abstract: The power supply apparatus includes a transformer, at least one switching element provided on a primary side of the transformer and configured to perform a switching operation to output an output voltage from a secondary side of the transformer, and a control unit configured to determine a turn-on time of a pulse signal for controlling the switching element for each of first cycles, and perform a predetermined control in which a change value of the turn-on time of the pulse signal for each of second cycles each including the first cycles becomes smaller than a change value of the turn-on time of the pulse signal for each of the first cycles, to change the second cycle depending on operation states.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: December 3, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yasuhiro Shimura, Hiroki Asano
  • Patent number: 10483869
    Abstract: Embodiments are directed to power conversion circuits including a bypass circuit for bypassing an inrush current limiting resistor. In one embodiment, a power conversion circuit is provided that includes a bridge rectifier, a current limiting resistor, a controllable current switching device, and a driver. The current limiting resistor has a first terminal coupled to an output terminal of the bridge rectifier and a second terminal coupled to an electrical ground. The controllable current switching device has conduction terminals coupled in parallel with respect to the current limiting resistor. The driver is coupled between the first terminal of the current limiting resistor and a control terminal of the current switching device, and the driver controls an operation of the current switching device based on a current through the current limiting resistor.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: November 19, 2019
    Assignee: STMICROELECTRONICS LTD
    Inventors: Laurent Gonthier, Kimi Lu, Jack Wang
  • Patent number: 10361624
    Abstract: A power converter circuit includes a plurality of first converter cells, a plurality of second converter cells, and a plurality of DC link capacitors. Each of the plurality of first converter cells is coupled to a corresponding one of the plurality of DC link capacitors. Each of the plurality of second converter cells is coupled to a corresponding one of the plurality of DC link capacitors. At least one of the plurality of second converter cells is configured to, during start-up of the power converter, internally dissipate power received from the corresponding DC link capacitor while a cell output power of the at least one of the plurality of second converter cells is substantially zero.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: July 23, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Johann Kolar, Matthias Kasper
  • Patent number: 10320283
    Abstract: A power converter as disclosed herein includes circuitry to reduce switching current spikes as conventionally appear at startup, and control the current spikes in a predictable way, thereby improving reliability of the power converter. A controller generates drive signals to half-bridge switching elements, an output therefrom corresponding to a frequency of the gate drive signals. A resonant tank comprises a resonant capacitor, DC blocking capacitor, a resonant inductor, and a load. Pre-charge circuitry is coupled to the resonant tank and, after initially receiving power from the DC power source and prior to controller startup, pre-charges at least the DC blocking capacitor to a steady state operating value. By pre-charging the DC blocking capacitor to its steady state voltage even before startup of the controller, AC current is introduced into the resonant inductor after the low-side switching element is first turned on and soft switching is provided throughout.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: June 11, 2019
    Assignee: Universal Lighting Technologies, Inc.
    Inventor: Wei Xiong
  • Patent number: 10284107
    Abstract: An AC/DC converter includes a first terminal and a second terminal to receive an AC voltage and a third terminal and a fourth terminal to deliver a DC voltage. A rectifying bridge is provided in the converter. A controllable switching or rectifying element has a control terminal configured to receive a control current. A first switch is coupled between a supply voltage and the control terminal to inject the control current. A second switch is coupled between the control terminal and a reference voltage to extract the control current. The first and second switches are selectively actuated by a control circuit.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: May 7, 2019
    Assignees: STMicroelectronics (Tours) SAS, STMicroelectronics S.r.l.
    Inventors: Laurent Gonthier, Roberto Larosa, Giulio Zoppi
  • Patent number: 10243451
    Abstract: A circuit and method for regulating an internal power supply of a switching converter is presented. A switching converter with a depletion mode power switch coupled to an enhancement mode power switch via a switching node and an energy storing element coupled to the depletion mode power switch is provided. The energy storing element may be adapted to provide energy to the switching converter. For instance, the energy storing element may be a capacitor. Optionally, the switching converter may comprise an inductor coupled to the depletion mode transistor, the inductor being adapted to provide an inductor current.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: March 26, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Christoph N. Nagl, Nebojsa Jelaca
  • Patent number: 10193457
    Abstract: A DC-to-DC power converter includes a transformer having a primary side and a secondary side, and a primary circuit electrically coupled to the primary side of the transformer. The primary circuit includes a primary microcontroller configured to generate a first energizing signal that energizes a portion of the primary circuit. The DC-to-DC power converter also includes a secondary circuit electrically coupled to the secondary side of the transformer. The secondary circuit includes a secondary microcontroller communicatively coupled to the primary microcontroller, wherein the secondary microcontroller is configured to provide an instruction to the primary microcontroller that causes the primary microcontroller to relinquish control of the primary circuit to the secondary microcontroller, and wherein the secondary microcontroller is further configured to provide a second energizing signal to the portion of the primary circuit.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: January 29, 2019
    Assignee: ABB Schweiz AG
    Inventors: Abhiman Ananthakrishna Hande, Jouni Timo Uusitalo
  • Patent number: 10164538
    Abstract: A supply circuit includes a rectifying bridge arranged in series between two high voltage capacitors. An AC line provides an intermediate voltage to a low voltage capacitor through the two high voltage capacitors. A plurality of resistors mounted in series with the two high voltage capacitors. A voltage clamping device limits the intermediate voltage at the low voltage capacitor and a linear series regulator provides an output DC voltage.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: December 25, 2018
    Assignee: Mosway Semiconductor Limited
    Inventors: Chi-Keung Tang, Chiu-Sing Celement Tse, Ngai Wa Wong
  • Patent number: 10050516
    Abstract: An ACF power converter uses a soft start operation to reduce overheating and stress on components. The power converter includes a first transistor and second transistor. A high side driver controls the first transistor, and low side driver controls the second transistor. A first operating potential is provided to the low side driver during a first period of time. The second transistor switches based on an oscillator signal having a first rate of frequency change to generate a second operating potential for the high side driver, while attempting to hold the first transistor in the non-conductive state during a second time period. The first and second transistors switch based on the oscillator signal having a second rate of frequency change during a third time period. The power converter is held in ACF mode and inhibited from changing state for a period of time post soft start.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: August 14, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Bryan Wayne McCoy, Ajay Karthik Hari
  • Patent number: 9991790
    Abstract: A current control apparatus arranged to regulate an electric current flowing between a load and an external electric circuit includes a current control loop having a current regulator arranged to manipulate an amount of the electric current flowing between the load and the external electric circuit; and a voltage control loop having a voltage regulator arranged to manipulate a voltage across the current regulator.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: June 5, 2018
    Assignee: City University of Hong Kong
    Inventors: Shu Hung Henry Chung, Kuen Faat Yuen, Wing To Fan
  • Patent number: 9955547
    Abstract: A load control device for controlling the amount of power delivered to an electrical load may include a rectifier circuit configured to receive a phase-control voltage and produce a rectified voltage. A power converter may be configured to receive the rectified voltage at an input and generate a bus voltage. An input capacitor may be coupled across the input of the power converter. The input capacitor may be adapted to charge when the magnitude of the phase control voltage is approximately zero volts. The power converter may be configured to operate in a boost mode, such that the magnitude of the bus voltage is greater than a peak magnitude of the input voltage. The power converter may be configured to operate in a buck mode to charge the input capacitor from the bus voltage when the magnitude of the phase-control voltage is approximately zero volts.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: April 24, 2018
    Assignee: LUTRON ELECTRONICS CO., INC.
    Inventors: Mark Taipale, Matthew Robert Blakeley, Johnathan Paul Ross, Russell L. MacAdam
  • Patent number: 9941783
    Abstract: An electronic device is provided. The electronic device includes a power supply module, a system load, a soft start unit, a unidirectional conducting unit and a connector. The system load is electrically coupled with the power supply module. The soft start unit is electrically coupled with the system load and the power supply module. The unidirectional conducting unit is electrically coupled between the soft start unit and the power supply module, so as to prevent the energy from the power supply module from entering the soft start unit. The connector has a power input terminal. The power input terminal is electrically coupled with the soft start unit.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: April 10, 2018
    Assignee: QUANTA COMPUTER INC.
    Inventors: Hsin-Chih Kuo, Ming-Chieh Lee
  • Patent number: 9917528
    Abstract: An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and is adapted to receive a control signal and to produce an alternating current power signal. The frequency of the alternating current power signal is responsive to the control signal. The frequency dependent reactive device is electrically coupled to the pair of transistors for receiving the alternating current power signal and producing an output power signal. The frequency dependent reactive device is chosen to achieve a desired voltage of the output power signal relative to the frequency of the alternating current power signal. The control element senses an actual voltage of the direct current power signal and modifies the control signal delivered to achieve the desired voltage of the direct current power signal.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: March 13, 2018
    Assignee: Advanced Charging Technologies, LLC
    Inventors: W. J. Weaver, Jr., Michael H. Freeman, Mitchael C. Freeman, Robert Dieter, Brian Santee
  • Patent number: 9882481
    Abstract: A method of regulating an output voltage of a buck converter during a startup period in which the buck converter is first enabled includes regulating the output voltage of the buck converter to a reference voltage under current-mode control during a first part of the startup period, and regulating the output voltage of the buck converter to the reference voltage under voltage-mode control during a second, later part of the startup period. The reference voltage ramps up from an initial voltage at the beginning of the startup period to a target voltage at the end of the startup period. Buck converter embodiments are also described.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: January 30, 2018
    Assignee: Infineon Technologies Austria AG
    Inventors: Matthew Mascioli, Mattia Oddicini, Herbert Zojer
  • Patent number: 9876439
    Abstract: An ultra high voltage regulator includes a rectifying circuit, a first transistor, a second transistor, an output capacitor, a bootstrap diode, a bootstrap capacitor, and a gate driver circuit. The ultra high voltage regulator converts a received alternative current into a direct voltage to an electrical component. The ultra high voltage regulator is capable of providing a larger current becomes more compact and thinner in size without cooperating with a mass transformer/high voltage capacitor, which satisfies the request for miniaturization of the electrical components.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: January 23, 2018
    Assignee: DiWIN technology CO. LTD
    Inventor: Ching-Yueh Hsu
  • Patent number: 9806631
    Abstract: An apparatus for controlling paralleled inverter is disclosed. In the apparatus for controlling paralleled inverter, one synchronization signal is shaped by at least two inverters to respectively transmit a voltage command and an operation command.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: October 31, 2017
    Assignee: LSIS CO., LTD.
    Inventor: Jong Je Park
  • Patent number: 9781807
    Abstract: An OVP circuit includes a voltage boost circuit, for boosting an input voltage into an output voltage in need and providing the output voltage to a load, a voltage control module for controlling the voltage boost circuit to boost an input voltage into an output voltage in need and for providing the output voltage to the load, an overvoltage protection module for monitoring a voltage of a positive terminal of the load to enable or disable the voltage control module, and an overvoltage adjusting module for monitoring an operation voltage of the load to adjust the overvoltage. It effectively prevents from the abnormal operation attributed by over practical operation voltage or prevents components from damage attributed by tardy protection. The present invention also proposes an LED backlight driving circuit using the OVP circuit and an LCD having the LED backlight driving circuit.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: October 3, 2017
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Dan Cao
  • Patent number: 9660552
    Abstract: An apparatus for controlling paralleled inverter is disclosed. In the apparatus for controlling paralleled inverter, one synchronization signal is shaped by at least two inverters to respectively transmit a voltage command and an operation command.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: May 23, 2017
    Assignee: LSIS CO., LTD.
    Inventor: Jong Je Park
  • Patent number: 9626259
    Abstract: A user device is provided. The device includes a main power supply, and an auxiliary power supply. The main power supply provides a main power. The auxiliary power supply cuts off the main power according to a power level of the main power supply and provides an auxiliary power upon Sudden Power-Off (SPO).
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: April 18, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hwan-Jin Yong, Donghyun Song, Janghwan Kim, Young-Goo Ko, Hyuck-Sun Kwon, Taek-Sung Kim, Kwang-Ho Kim, Byungjin Ahn, Dongjin Lee, Byungse So, Jong-Gyu Park, Kyoungsub Oh, Kwan-Jong Park, Jong-Soo Seo, Tae-Hwa Yoo, Min-Ho Kim
  • Patent number: 9603205
    Abstract: Embodiments described herein describe a power supply controller configured to control a power supply that provides power to an output load via a power supply transformer. The power supply controller includes a first terminal that provides supply voltage to the controller. The controller also includes a second terminal coupled to a switch external to the controller, the switch is part of a power converter controlled by the controller, wherein the second terminal is used for an initial power up of the power converter when the switch is turned on and used for a second functionality when the switch is turned off.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: March 21, 2017
    Assignee: Dialog Semiconductor Inc.
    Inventors: Xiaolin Gao, Ping Lo, Juyoung Yoon
  • Patent number: 9591712
    Abstract: An OVP circuit includes a voltage boost circuit, for boosting an input voltage into an output voltage in need and providing the output voltage to a load, a voltage control module for controlling the voltage boost circuit to boost an input voltage into an output voltage in need and for providing the output voltage to the load, an overvoltage protection module for monitoring a voltage of a positive terminal of the load to enable or disable the voltage control module, and an overvoltage adjusting module for monitoring an operation voltage of the load to adjust the overvoltage. It effectively prevents from the abnormal operation attributed by over practical operation voltage or prevents components from damage attributed by tardy protection. The present invention also proposes an LED backlight driving circuit using the OVP circuit and an LCD having the LED backlight driving circuit.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: March 7, 2017
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Dan Cao
  • Patent number: 9584029
    Abstract: An apparatus includes a voltage regulation module that controls output voltage of a bidirectional DC to DC converter to an output voltage reference over an output current range between a positive power reference and a negative power reference. A positive power regulation module controls output power of the converter to the positive power reference over a positive constant power range between the output voltage reference and a positive output current reference. A negative power regulation module controls output power of the converter to the negative power reference over a constant power range between the output voltage reference and a maximum negative power limit, and a constant current module limits output current to a positive output current reference in a range between a minimum output voltage and output power of the converter reaching the positive power reference.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: February 28, 2017
    Assignee: UTAH STATE UNIVERSITY
    Inventors: Regan A Zane, Daniel Seltzer, Dragan Maksimovic, Boris Jacobson, Donald Desrosiers
  • Patent number: 9577535
    Abstract: A power conversion apparatus includes a switch circuit which drives switching elements based on a control signal, a feedback section which performs feedback control, a signal output section which outputs the control signal based on a controlled variable of the feedback control, an output value detecting section which detects an output value outputted from the switch circuit, and an operation determining unit which has an operation stop determination section which determines whether to stop operation of the switching elements based on a rate of change of the output value, and an operation start determination section which determines whether to start operation of the switching elements based on the controlled variable.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: February 21, 2017
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Norihito Kimura, Kimikazu Nakamura, Yuji Hayashi
  • Patent number: 9577517
    Abstract: A DCDC converter includes a transconductance amplifier, a comparator, a current driving component, an output impedance, a switch, a clamp resistor and a p-channel FET. The transconductance amplifier outputs a transconductance current and a switch control signal. The comparator has a two n-channel FET inputs forming a differential pair and outputs a compared signal. The current driving component generates an output current based on the compared signal. The output impedance component generates an output DC voltage based on the output current. The switch is between the two n-channel FETs and can open and close based on the switch control signal. The clamp resistor is arranged in series with the switch. The p-channel FET is in series with the clamp resistor and is controlled by the output DC voltage.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: February 21, 2017
    Assignee: Texas Instruments Deutschland GmbH
    Inventors: Gerhard Thiele, Erich Bayer
  • Patent number: 9531254
    Abstract: A method of controlling a start-up sequence of a DC/DC Buck converter includes continuously comparing the Buck converter's output voltage with an internal reference voltage and continuously monitoring for a Buck converter start-up signal. If the output voltage is greater than the reference voltage when a Buck converter start-up signal is detected, the Buck converter is switched off and an output capacitor of the Buck converter is discharged through a pull-down unit until the output voltage substantially equals the internal reference voltage and then restarting the Buck converter.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: December 27, 2016
    Assignee: OPTIS CIRCUIT TECHNOLOGY, LLC
    Inventor: Philippe Pignolo
  • Patent number: 9531251
    Abstract: A quick discharge circuit includes a reference voltage source, a power supply voltage monitoring circuit, a control circuit, and a discharge circuit. The reference voltage source provides a threshold voltage for quick discharge; the power supply voltage monitoring circuit collects change conditions of a power supply voltage; the control circuit performs logical control according to the power supply voltage collected by the power supply voltage monitoring circuit and the threshold voltage provided by the reference voltage source to determine whether the discharge circuit is ON. With the quick discharge circuit, when a terminal product is powered off, an input bulk capacitor of a DC-DC circuit is discharged quickly so that the voltage thereof rapidly drops to a safe voltage range. When the terminal product is powered on again quickly, it is guaranteed that a soft start circuit works normally so as to implement slow increase of power-on voltage and current.
    Type: Grant
    Filed: May 7, 2012
    Date of Patent: December 27, 2016
    Assignee: ZTE Corporation
    Inventor: Zhong Zhang
  • Patent number: 9500691
    Abstract: An apparatus and method for detecting a disconnection of lamps are provided. The apparatus includes a power supply that is configured to supply power to a vehicle and a controller. The controller receives operation power for at least one lamp mounted within the vehicle and supplies the operation power to the at least one lamp. In addition, the controller measures an inrush current value generated from the at least one lamp for a plurality of time intervals and detects the disconnection of the at least one lamp based on the inrush current value.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: November 22, 2016
    Assignee: Hyundai Motor Company
    Inventor: Hyun Chul Yun
  • Patent number: 9474124
    Abstract: There is provided an output circuit for supplying an output current to a load coupled to an output terminal in response to an input signal. The output circuit includes an output transistor for supplying the output current to the output terminal, an output-drive circuit for driving the output transistor, a constant-current limiting circuit for generating a current control signal for limiting the output current to a predetermined current value, and a control circuit for implementing a control such that the output current is controlled on the basis of the current control signal if a voltage at the output terminal is at a predetermined voltage, or less after the input signal is supplied while the output transistor is driven by the output-drive circuit if the voltage at the output terminal is in excess of the predetermined voltage.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: October 18, 2016
    Assignee: Renesas Electronics Corporation
    Inventor: Takashi Yamauchi
  • Patent number: 9461546
    Abstract: An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and is adapted to receive a control signal and to produce an alternating current power signal. The frequency of the alternating current power signal is responsive to the control signal. The frequency dependent reactive device is electrically coupled to the pair of transistors for receiving the alternating current power signal and producing an output power signal. The frequency dependent reactive device is chosen to achieve a desired voltage of the output power signal relative to the frequency of the alternating current power signal. The control element senses an actual voltage of the direct current power signal and modifies the control signal delivered to achieve the desired voltage of the direct current power signal.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: October 4, 2016
    Assignee: ADVANCED CHARGING TECHNOLOGIES, LLC
    Inventors: Michael H. Freeman, W. J. “Jim” Weaver, Jr., Mitchael C. Freeman, Robert Dieter, Brian Santee
  • Patent number: 9419532
    Abstract: An electric power conversion system includes: a primary circuit including a first port, a second port and a primary electric power conversion unit; and a secondary circuit magnetically coupled to the primary circuit by a transformer and including a third port, a fourth port and a secondary electric power conversion unit. The electric power conversion system is configured to convert electric power between any two of the four ports with the use of the primary and secondary electric power conversion units, and convert electric power between the first and second ports and between the third and fourth ports with the use of electric power conversion circuit portions other than a faulty electric power conversion circuit portion among a plurality of electric power conversion circuit portions configured in the primary and secondary electric power conversion units.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: August 16, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Takahiro Hirano
  • Patent number: 9379618
    Abstract: An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and is adapted to receive a control signal and to produce an alternating current power signal. The frequency of the alternating current power signal is responsive to the control signal. The frequency dependent reactive device is electrically coupled to the pair of transistors for receiving the alternating current power signal and producing an output power signal. The frequency dependent reactive device is chosen to achieve a desired voltage of the output power signal relative to the frequency of the alternating current power signal. The control element senses an actual voltage of the direct current power signal and modifies the control signal delivered to achieve the desired voltage of the direct current power signal.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: June 28, 2016
    Assignee: ADVANCED CHARGING TECHNOLOGIES, LLC
    Inventors: Michael H. Freeman, W. J. “Jim” Weaver, Jr., Mitchael C. Freeman, Robert Dieter, Brian Santee
  • Patent number: 9379637
    Abstract: An ultra high voltage regulator for converting includes a rectifying circuit, a first transistor, a second transistor, an output capacitor, a first resistor, a second resistor, and a third resistor. The ultra high voltage regulator converts a received alternative current into a direct voltage to an electrical component. The ultra high voltage regulator capable of providing a larger current becomes more compact and thinner in size without cooperating with a mass transformer/high voltage capacitor, which satisfies the request for miniaturization of the electrical components.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: June 28, 2016
    Assignee: DiWIN technology CO. LTD
    Inventor: Ching-Yueh Hsu
  • Patent number: 9367072
    Abstract: An AC-DC power converter includes a rectifying unit, an output stage, a controller and a soft-start circuit. The rectifying unit is configured to rectify an AC voltage to a rectified voltage. The output stage is coupled to the rectifying unit and configured to convert the rectified voltage into a DC voltage for a load. The controller is coupled to the output stage and configured to control the output stage. The soft-start circuit is coupled to the rectifying unit to receive the rectified voltage. The soft-start circuit is configured to detect whether the rectified voltage is at or below a predetermined level, and to enable the controller if the rectified voltage is detected to be at or below the predetermined level.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: June 14, 2016
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Mohammad Al-Shyoukh, Percy Neyra
  • Patent number: 9337720
    Abstract: A power converter startup circuit establishes an operating voltage for control circuitry during startup and is then disabled to reduce no-load power dissipation. The startup circuit has a normally on characteristic to automatically provide startup charging current for a startup capacitor. The control circuitry begins operating as the startup capacitor voltage reaches an operating value, and it generates an inhibitory signal that disables the startup circuit to stop the startup charging current and reduce power dissipation. The normally on characteristic is achieved by an emitter switched current source employing a normally on device such as a depletion-mode J-FET. A resistor divider network provides both biasing for the startup current source and a point of monitoring the power supply input voltage during steady state operation.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: May 10, 2016
    Assignee: Bel Fuse (Macao Commercial Offshore) Limited
    Inventor: Mark Jutras
  • Patent number: 9041379
    Abstract: A bootstrap assist circuit and a startup circuit comprising a voltage controlled switch and a startup ramp voltage generator connected to the voltage controlled switch that will control a high side switch, a dimming interface or an enable/disable input function. Said system is used to provide a bootstrap technique to continuously switch a floating high side switch (MOSFET) by continuously charging a capacitor and then “level shifting” said capacitor voltage across the gate and source of the said high side switch to turn the switch on.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: May 26, 2015
    Assignee: Lumastream Canada ULC
    Inventor: Steven Lyons
  • Patent number: 9030186
    Abstract: A bandgap voltage reference and voltage regulator system includes a bandgap voltage reference circuit and a voltage regulator circuit that share a single, common amplifier. The amplifier acts as a gain stage for the reference circuit and as an error amplifier for a driver stage of the regulator circuit. The regulator circuit has an input reference generated by the reference circuit, and the reference circuit acts as a load to the driver stage, obviating the need for a bias resistance network. By sharing the amplifier and obviating the need for a resistance network, the area and overall quiescent current of the system are reduced. The system can be implemented in CMOS/BiCMOS technology and is suited for low power applications.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: May 12, 2015
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Rakesh K. Gupta, Jaideep Banerjee, Sanjay K. Wadhwa
  • Patent number: 9030855
    Abstract: A semiconductor device, a start-up circuit, and an operating method for the same are provided. The start-up circuit comprises a semiconductor unit, a first circuit, a second circuit, a voltage input terminal and a voltage output terminal. The first circuit is constituted by one diode or a plurality of diodes electrically connected to each other in series. The second circuit is constituted by one diode or a plurality of diodes electrically connected to each other in series. The semiconductor unit is coupled to a first node between the first circuit and the second circuit. The voltage input terminal is coupled to the semiconductor unit. The voltage output terminal is coupled to a second node between the semiconductor unit and the first circuit.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: May 12, 2015
    Assignee: Macronix International Co., Ltd.
    Inventors: Wing-Chor Chan, Chih-Min Hu, Li-Fan Chen
  • Patent number: 9024614
    Abstract: In a power supply device, the controller outputs a control signal specifying a voltage value. The voltage conversion unit converts a first voltage to a second voltage in response to a control signal specifying a voltage value output from the controller. The voltage conversion unit converts the first voltage to a start voltage, as the second voltage, in response to a first control signal specifying a start voltage value output from the controller and further converts the first voltage to a target voltage, as the second voltage, in response to a second control signal specifying a target voltage value output from the controller. A transition period of time is intervened between generation of the start voltage and generation of the target voltage during which the controller outputs a third control signal specifying the intermediate voltage value between the start voltage value and the target voltage value.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: May 5, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Tsuyoshi Maruyama, Katsumi Inukai
  • Patent number: 9018923
    Abstract: Apparatus and methods operate to disable a dynamically biased apparatus and a dynamic bias current source providing dynamic bias current to the apparatus at the beginning of a static bias startup period shortly after power-on. The dynamically biased apparatus is then gradually enabled in a static bias mode of operation during the static bias startup period. Following the end of the static bias startup period, operation of the dynamically biased apparatus in a dynamic transconductance mode is gradually enabled during a dynamic bias startup period. Such startup sequence operates to prevent damaging in-rush currents in a system employing the dynamically biased apparatus in a feedback control loop.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: April 28, 2015
    Assignee: Texas Instruments Incorporated
    Inventors: Charles Parkhurst, Mark Hamlyn
  • Patent number: 9013169
    Abstract: A control circuit for controlling a soft-start time of a DC power supply includes a digital potentiometer, a first drive circuit, and a controller. The digital potentiometer includes a first potentiometer. The first drive circuit includes a first driver, a first MOSFET, and a first charge capacitor. The first driver charges the first charge capacitor via the first potentiometer when the DC power supply is first switched on, and the first MOSFET is switched on to connect the DC power supply to the load when the first charge capacitor is fully charged. The controller regulates resistance of the first potentiometer to regulate a charge time constant of the first charge capacitor, enabling a gradual rise in voltage supplied, from approximately zero to full power, within a desired period of time.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: April 21, 2015
    Assignees: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Ying-Bin Fu, Yuan-Xi Chen, Ya-Jun Pan
  • Patent number: 9000742
    Abstract: A signal generating circuit includes: a first signal amplifying circuit arranged to generate a first amplified signal according to a first supply current, a reference signal, and an output signal of the signal generating circuit; a soft-start circuit arranged to generate a control signal according to a soft-start signal; a current controlled circuit arranged to generate the first supply current according to the soft-start signal; and a pass transistor arranged to generate an output signal according to an error amplified signal and the control signal. The error amplified signal is derived from the first amplified signal.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: April 7, 2015
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Xi Chen, Chien-Wei Kuan
  • Patent number: 8975883
    Abstract: A soft start circuit includes an error amplifier for generating a control signal according to an input voltage, a feedback voltage and a reference voltage, a feedback circuit for generating the feedback voltage according to an output voltage, an internal voltage source for generating a soft start voltage, and a sink circuit including a first transformation module for generating a first transformation current according to the soft start voltage, a second transformation module for generating a second transformation current according to the feedback voltage, a comparison module coupled to the first transformation module and the second transformation module for generating a comparison result according to the first transformation current and the second transformation current, and an output module coupled to the comparison module for generating a sink current according to the comparison result, so as to control the control signal.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: March 10, 2015
    Assignee: Anpec Electronics Corporation
    Inventors: Chih-Ning Chen, Yen-Ming Chen
  • Patent number: 8957710
    Abstract: The present relates to a start-up circuit, which is used for starting up a variable power supply circuit, which comprises a detection circuit and a transition circuit. The detection circuit is used for detecting an output voltage of the variable power supply and producing a detection signal. The transition circuit is coupled to the detection circuit. It transits the level of the detection signal and produces a control signal for starting up or cutting off the variable power supply. Thereby, the problem of incapability in transition can be avoided as well as achieving the purpose of low power consumption.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: February 17, 2015
    Assignee: Sitronix Technology Corp
    Inventor: Ping Lin Liu
  • Patent number: 8942012
    Abstract: At least one embodiment is directed to a semiconductor voltage controller comprising: a start-mode circuit associated with a start-mode; and an off-mode circuit associated with an off-mode, where the voltage controller can be configured to receive a feedback signal and an off-mode signal from a single input and provide an output voltage, where the voltage controller can be configured to be in the off-mode when the feedback signal is less than a skip level and the feedback signal is less than a HV control level, and where the voltage controller can be configured to be in start mode when the feedback signal is greater than HV control level and Vcc is below a Vcc-start.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: January 27, 2015
    Assignee: Semiconductor Components Industries, LLC
    Inventor: Jean-Paul Louvel
  • Patent number: 8934271
    Abstract: A startup circuit includes a MOSFET that is connected between a startup power source and an auxiliary power source made of a smoothing capacitor and passes a startup current from the startup power source to the smoothing capacitor, a JFET that has a drain terminal connected to a drain terminal of the MOSFET and a source terminal connected through a resistor to a gate terminal of the MOSFET, and a pinch-off voltage controller that controls a pinch-off voltage of the JFET to a first reference voltage at startup and to a second reference voltage, which is lower than the first reference voltage, after startup.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: January 13, 2015
    Assignee: Sanken Electric Co., Ltd.
    Inventors: Hideyuki Kubota, Satoshi Kondou