With Starting Arrangement Patents (Class 363/49)
  • Patent number: 10530248
    Abstract: The present disclosure relates to a head-wearable hearing device comprising a multiple-output switched capacitor DC-DC converter. Said multiple-output switched capacitor DC-DC converter comprises a switch matrix comprising a plurality of individually controllable semiconductor switches and a plurality of flying capacitors connected between respective sets of circuit nodes of the switch matrix. A controller is connected to respective control terminals of the plurality of individually controllable semiconductor switches of the switch matrix to configure first and second converter sections to form first and second converter topologies, respectively.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: January 7, 2020
    Assignee: GN Hearing A/S
    Inventors: Dennis Øland Larsen, Martin Vinter
  • Patent number: 10523132
    Abstract: A method and apparatus for start-up of a voltage source converter (VSC) which is connected to an energized DC link (DC+, DC?). The VSC is connected to a first AC network via a first transformer and an AC isolation switch, the AC isolation switch being coupled between the first transformer and the AC network. The method involves using an auxiliary AC power supply to generate an AC supply to energize the first transformer with the AC isolation switch open. The VSC is then started, with a VSC controller using the AC supply generated by the auxiliary AC power supply as a reference for controlling the VSC. The auxiliary AC power supply may also be used to supply power to at least one VSC load, such as the controller and/or an auxiliary load such as a cooling system. Once the VSC is started the isolation switch 204 can be closed.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: December 31, 2019
    Assignee: General Electric Technology GmbH
    Inventors: Robert Whitehouse, Carl Barker
  • Patent number: 10483870
    Abstract: A power conversion method comprising: charging a plurality of energy storage devices of a power converter from an input power source; and sequentially coupling and decoupling energy storage devices of the plurality of energy storage devices to an output. Charging the plurality of energy storage devices comprises maintaining at least two of the plurality of energy storage devices at substantially different potentials.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: November 19, 2019
    Assignee: Offshore Renewable Energy Catapult
    Inventors: Chong Hwa Ng, Paul McKeever, Michael Edward Smailes
  • Patent number: 10431262
    Abstract: A method for controlling operations of a memory device, the memory device and the controller thereof, and the associated electronic device are provided. The method can comprise: before a voltage-drop event regarding a driving voltage occurs, mapping a rising reference voltage and a falling reference voltage to a first reference voltage and a second reference voltage, respectively; when the voltage-drop event occurs, pausing at least one access operations to a non-volatile (NV) memory, and mapping the rising reference voltage and the falling reference voltage to another first reference voltage and another second reference voltage, respectively; and when the voltage-drop event ends, mapping the rising reference voltage and the falling reference voltage to the first reference voltage and the second reference voltage, respectively.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: October 1, 2019
    Assignee: Silicon Motion Inc.
    Inventors: Yu-Wei Chyan, Li-Shuo Hsiao
  • Patent number: 10401929
    Abstract: A control circuit for a programmable power supply is provided. It comprises a reference generation circuit generating a voltage-reference signal and a current-reference signal for regulating an output voltage and an output current of the power supply. A feedback circuit detects the output voltage and the output current for generating a feedback signal in accordance with the voltage-reference signal and the current-reference signal. A switching controller generates a switching signal coupled to switch a transformer for generating the output voltage and the output current in accordance with the feedback signal. A micro-controller controls the reference generation circuit. The micro-controller, the reference generation circuit, and the feedback circuit are equipped in the secondary side of the transformer. The switching controller is equipped in the primary side of the transformer. The control circuit can achieve good performance for the programmable power supply.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: September 3, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Ta-Yung Yang
  • Patent number: 10368166
    Abstract: The present invention provides an apparatus for managing power within a voltage regulating circuit of a battery-powered hearing aid device includes an input terminal of a voltage regulator that receives an input voltage supplied by a battery. An output terminal of the voltage regulator provides an output voltage to a hearing aid terminal that is electrically connected to one or more electrical components of the hearing aid device. A sensing terminal of the voltage regulator senses an electrical connection between the charging device is and charging contacts of the voltage regulating circuit. The voltage regulator is configured to reduce a magnitude of the input voltage when the magnitude of the input voltage exceeds an input voltage threshold to generate the output voltage having a magnitude that is less than a maximum output voltage.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: July 30, 2019
    Assignee: ZPower, LLC
    Inventors: Troy W. Renken, Don Barrett, Timothy W. Powers
  • Patent number: 10263532
    Abstract: An electronic system includes two power supplies to supply an operating voltage to a switching power converter. The first power supply, referred to as a start-up power supply, includes a first source follower transistor to conduct a start-up current for a controller and supply an operating voltage for the controller. The controller controls operation of the switching power converter. A second power supply, referred to as an auxiliary power supply, includes a second source follower transistor to conduct a steady-state operational current for the controller and supply an operating voltage for the controller. In at least one embodiment, once the second power supply begins supplying the operating voltage to the controller, the start-up power supply automatically ceases supplying the start-up current to the controller.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: April 16, 2019
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: John L. Melanson, Eric J. King
  • Patent number: 10224823
    Abstract: An integrated circuit used for a switching converter has a power supply circuit for providing a power supply voltage, and a control circuit. The switching converter has a switching circuit converting a DC input voltage into an output signal. The power supply circuit has a protection circuit, an UVLO unit and a current source coupled to a power supply capacitor. The protection circuit detects whether the DC input voltage is at a brown-in state. The UVLO unit generates a lock out signal by comparing the power supply voltage with a upper threshold voltage and a lower threshold voltage. The lower threshold voltage is selectively limited to one of a first value or a second value based on the detection. The second value is less than the first value. The current source provides the power supply voltage under the control of the lock out signal.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: March 5, 2019
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Yuedong Chen
  • Patent number: 10199932
    Abstract: A reference signal generator includes a voltage reference, an amplifier coupled to the voltage reference, and a precharge circuit coupled to the amplifier. The voltage reference is configured to generate a constant voltage. The amplifier is configured to receive the constant voltage from the voltage reference and generate a regulating primary output signal and a non-regulating secondary output signal. The precharge circuit is configured to charge a noise reduction capacitor with the non-regulating secondary output signal.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: February 5, 2019
    Assignee: Texas Instruments Incorporated
    Inventor: Roy Alan Hastings
  • Patent number: 10186955
    Abstract: Ideal switch bridgeless PFC topologies are presented with the purpose of increasing the efficiency in power factor correction circuits and inverter applications. The topology also leverages the new GaN switches that are available. This patent offers also a very good solution for the Zero crossing distortion problem improving greatly the THD both in power factor correction and inverter applications.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: January 22, 2019
    Assignee: ROMPOWER TECHNOLOGY HOLDINGS, LLC
    Inventors: Ionel Jitaru, Marco Antonio Davila, Cosmin Andrei Tamas
  • Patent number: 10186869
    Abstract: A method for testing an electric system and an electric system comprising a first inverter (10) and one or more second inverters (11, 12, 1N), and control means (40) configured to start the first inverter (10), provide and sustain with the first inverter (10) an AC voltage of a predetermined magnitude and a predetermined frequency at an AC output of the first inverter, start at least one second inverter (11, 12, 1N), and supply with the first inverter (10) reactive power to the started at least one second inverter (11, 12, 1N).
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: January 22, 2019
    Assignee: ABB Schweiz AG
    Inventors: Mikko Myller, Tomi Riipinen
  • Patent number: 10177673
    Abstract: Generally speaking, a timing circuit helps determine diode conduction time of an LLC converter. In some examples, the circuit includes an LLC converter having a secondary side and a timing circuit, the timing circuit coupled to the LLC converter on the secondary side. The timing circuit includes a first branch, second branch, gate, and microprocessor. The gate is configured to receive an output of the first branch's comparator and a blanking signal from the second branch. The microprocessor is configured to receive, from the gate, a signal and determine, based at least in part on the signal, a diode conduction time for the LLC converter.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: January 8, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Shanguang Xu, Yitzhak Bolurian, Vaibhav Ramakant Desai
  • Patent number: 10170975
    Abstract: A controller for a switching power converter is provided with a single detection pin through which the controller monitors whether the switching power converter is connected to an AC mains. Should a voltage for the detection pin indicate that the switching power converter is disconnected from the AC mains, the controller asserts the detection pin voltage to trigger a bleeder circuit to discharge an X class capacitor.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: January 1, 2019
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Guang Feng, Qifeng Shi, Jiang Yu, Qiu Sha, Yong Xiong Lin
  • Patent number: 10162404
    Abstract: The present technology relates to a control apparatus, a control method, a cable, an electronic apparatus, and a communication apparatus that are capable of increasing the variation of a connection mode of an electronic apparatus to which a predetermined cable such as a USB cable can be connected. An electronic apparatus receiving a baseband signal of a baseband to start initialization processing for causing the electronic apparatus to be in a state of being capable of establishing connection or to turn on or off a power source based on detection results of power of a modulation signal obtained by frequency-converting the baseband signal into a signal of a predetermined frequency band higher than the baseband is controlled. The present technology can be applied to a cable connected to an electronic apparatus to which a cable capable of supplying a power source by bus power such as a USB cable.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: December 25, 2018
    Assignee: Sony Semiconductor Solutions Corporation
    Inventors: Hirosada Miyaoka, Katsuhisa Ito
  • Patent number: 10158281
    Abstract: In an embodiment, a power-supply controller includes a control circuit, a drive circuit, and a signal-drop-reducing circuit. The control circuit is configured to generate a drive signal having a duty cycle, and the drive circuit is configured to cause a phase circuit of a power supply to generate, in response to the drive signal, an output signal having a magnitude. And the signal-drop-reducing circuit is configured to disable the driver circuit in response to the duty cycle corresponding to a signal magnitude that is lower than the magnitude of the output signal. For example, where a power supply has a non-zero residual output signal (e.g., output voltage) on its output node after the power supply is deactivated, such a power-supply controller can reduce or eliminate a drop in the residual output signal caused by, or that would be caused by, a restarting of the power supply.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: December 18, 2018
    Assignee: INTERSIL AMERICAS LLC
    Inventors: Harold William Satterfield, James White
  • Patent number: 10141763
    Abstract: A soft start amplifier provides a soft-start function that controls a battery charging current in a feedback loop charging circuit by selecting the lowest voltage between a soft start voltage and an error derived control voltage. The lowest voltage is used as a control signal for controlling the battery charging current in the feedback loop charging circuit. The error voltage is a difference between a voltage proportional to the charging current and a voltage proportional to the target charging current while the soft start voltage is a voltage configured to ramp up with time. Using the lower voltage of the error voltage and the soft start voltage reduces the inrush current that may occur when the error derived control voltage spikes to the supply voltage in an attempt to correct the initial difference between the target charging current and a measured charging current.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: November 27, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Sandro Herrera, Alan K Jeffery
  • Patent number: 10141837
    Abstract: Device and method for energy harvesting using a self-oscillating power-on reset start-up circuit. The device for energy harvesting comprises a start-up circuit for generating self-oscillation and initial boosting of an input voltage from an energy source during a start-up phase; a main boost circuit for boosting the input voltage during a steady state phase; a clock generator circuit for generating clock signals which control voltage boosting of the main boost circuit during the steady state phase; and a switching circuit coupled to the start-up circuit, the main boost circuit and the clock generator circuit for switching powering of the clock generator circuit between the start-up circuit and the main boost circuit such that the clock generator circuit is powered by only one of the start-up circuit and the main boost circuit at any point in time.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: November 27, 2018
    Assignees: Agency for Science, Technology and Research, Nanyang Technological University
    Inventors: Yuan Gao, Abhik Das, Tae-Hyoung Kim
  • Patent number: 10122282
    Abstract: An electronic system and method include a controller to actively control power transfer from a primary winding of a switching power converter to an auxiliary-winding of an auxiliary power supply. The switching power converter is controlled and configured such that during transfer of power to the auxiliary-winding, the switching power converter does not transfer charge to one or more secondary-windings of the switching power converter. Thus, the switching power converter isolates one or more secondary transformer winding currents from an auxiliary-winding current. By isolating the charge delivered to the one or more secondary-windings from charge delivered to the auxiliary-winding, the controller can accurately determine an amount of charge delivered to the secondary-windings and, thus, to a load.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: November 6, 2018
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: John L. Melanson, Prashanth Drakshapalli, Siddharth Maru
  • Patent number: 10038377
    Abstract: One example includes a power supply system. The system includes a power stage comprising at least one power switch that is periodically activated during an on-time of a duty-cycle based on a switching signal to generate an output voltage at an output. The system also includes a switching controller configured to generate the switching signal based on an amplitude of a capacitor voltage at a control node associated with a capacitor that defines the on-time of the duty-cycle as a function of the capacitor being periodically charged. The switching controller includes a pre-bias stage configured to apply a pre-bias charge to the capacitor via an offset voltage prior to a start of the on-time to pre-charge parasitic capacitance associated with the power supply system prior to the start of the on-time.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: July 31, 2018
    Assignee: Texas Instruments Incorporated
    Inventors: Bhaskar Ramachandran, Sujan Kundpur Manohar, Jae Won Choi
  • Patent number: 10038365
    Abstract: A control circuit for a step-up converter includes a soft start module configured to control states of N transistor pairs of the step-up converter, where N is an integer greater than two. A driver module is in communication with the soft start module and configured to generate a first signal when N transistor pairs of the step-up converter are ready to switch. A first charging circuit is configured to charge (N-1) capacitors of the step-up converter to an input voltage of the step-up converter in response to the first signal and to generate a second signal when charging is complete. A second charging circuit is configured to sequentially charge the (N-1) capacitors of the step-up converter to (N-1) predetermined voltage values in response to the first signal and the second signal and before operation of the step-up converter begins.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: July 31, 2018
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Serhii Mikhailovich Zhak, Mark Anthony Belch, Brett A. Miwa, David Harrington, Jonathan King
  • Patent number: 9991814
    Abstract: A pre-charging circuit of inverter is disclosed, the pre-charging circuit of inverter including a relay arranged between an output node of the rectifier and an input node of the DC-link capacitor, and a pre-charging resistor arranged between an output node of the rectifier and an input node of the inverter unit, whereby a degree of freedom for PCB design can be obtained.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: June 5, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Tae Suk Bae, Jae Moon Lee
  • Patent number: 9985542
    Abstract: An integrated circuit (IC) for controlling the discharge of a capacitor coupled across first and second input terminals of a power converter circuit, wherein the first and second terminals for receiving an ac line voltage. The IC includes a switching element coupled across the first and second input terminals and a detector circuit. The detector circuit including first and second comparators that produce first and second output signals responsive to a zero-crossing event of the ac line voltage. The first and second output signals being used to generate a reset signal coupled to a timer circuit responsive to the zero-crossing event. When the reset signal is not received within a delay time period, the timer circuit outputs a discharge signal that turns the switching element on, thereby discharging the capacitor.
    Type: Grant
    Filed: September 24, 2016
    Date of Patent: May 29, 2018
    Assignee: Power Integrations, Inc.
    Inventors: Leif Lund, David Kung
  • Patent number: 9960668
    Abstract: The present disclosure provides a method for controlling soft start of a switching rectifier, which comprises: acquiring an external environmental parameter of the switching rectifier and a power supply characteristic parameter of an object to be powered, establishing a voltage start strategy and/or a current start strategy for the switching rectifier according to the external environmental parameter and the power supply characteristic parameter, and controlling a voltage and/or a current of the switching rectifier to start to a full-load voltage and/or a full-load current according to the voltage start strategy and/or the current start strategy. The present disclosure further provides a device for controlling soft start of a switching rectifier. The technical scheme of the present disclosure is able to provide a suitable voltage and/or current start approach for a switching rectifier according to power supply requirements of an object to be powered and operating environment of the switching rectifier.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: May 1, 2018
    Assignee: ZTE CORPORATION
    Inventors: Mingjin Wang, Dacheng Zheng, Yundong Yang, Qiong Wu, Zhe Liu
  • Patent number: 9923365
    Abstract: Disclosed is a short-circuit protection circuit for a voltage sampling resistor of a primary side converter, comprising a high voltage power transistor, a high voltage starting resistor, a first voltage dividing resistor of a port VDD, a second voltage dividing resistor of the port VDD, an NMOS transistor, a diode, a first comparator, a second comparator, a third comparator, a time delay circuit, a filter, a first logic circuit, a second logic circuit, a current supply, a first AND gate and a first inverter. The chip of the present disclosure is capable of correctly and effectively detecting whether the sampling resistor is shorted or not before the chip works normally, thereby avoiding the risk of damaging the chip by large current from the voltage feedback port FB due to turn-on of the switching transistor when the upper voltage sampling resistor is shorted, and greatly reducing the input power.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: March 20, 2018
    Assignee: Wuxi Chipown Micro-Electronics Limited
    Inventors: Haisong Li, Changshen Zhao, Yangbo Yi
  • Patent number: 9887618
    Abstract: There is provided a power supply device sensing an AC-off state. The power supply device includes a rectifier configured to rectify AC power into DC power, a transformer configured to supply output voltage by converting voltage of the DC power rectified by the rectifier, and a Pulse Width Modulation (PWM) control module configured to output voltage by switching a power switching device connected to the transformer, configured to drive the power supply device by connecting power of an HV pin to a VCC pin, and configured to determine an AC-off state by sensing voltage rectified by the rectifier.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: February 6, 2018
    Assignee: Magnachip Semiconductor, Ltd.
    Inventors: Zhi Yuan Cui, James Jung, Hae Wook Kim, Young Gi Ryu, Julie Jang
  • Patent number: 9853564
    Abstract: A synchronous rectifier includes: a rectifying circuit including transistors, the rectifying circuit being configured to generate rectified power by rectifying input power input to an input terminal of the rectifying circuit depending on switching operations of the transistors, and output the rectified power to an output terminal of the rectifying circuit; and a controller configured to apply a gate signal to each of the, and adjust a pulse width of the gate signal depending on a difference between the input power and the gate signal.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: December 26, 2017
    Assignees: Samsung Electro-Mechanics Co., Ltd., Research & Business Foundation Sungkyunkwan University
    Inventors: Chang Soo Kang, Chul Gyun Park, Young Jun Park, Kang Yoon Lee
  • Patent number: 9820339
    Abstract: A part is inductively heated by multiple, self-regulating induction coil circuits having susceptors, coupled together in parallel and in series with an AC power supply. Each of the circuits includes a tuning capacitor that tunes the circuit to resonate at the frequency of AC power supply.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: November 14, 2017
    Assignee: THE BOEING COMPANY
    Inventors: Marc Rollo Matsen, William Preston Geren, Robert James Miller, Mark Alan Negley, William Chet Dykstra
  • Patent number: 9793846
    Abstract: A power conversion device has an internal power supply switch and a bias power supply switch connected in parallel with the internal power supply switch, wherein, when an output voltage of an internal power supply circuit is greater than a predetermined value when a power supply is started up, the bias power supply switch opens a current path, and when the power supply is stopped, the step-up power supply circuit is stopped based on a stop signal output by the internal power supply circuit and the internal power supply switch closes the current path, and when the output voltage of the internal power supply circuit becomes lower than a predetermined value, the bias power supply switch closes the current path.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: October 17, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenichi Fujie, Katsuya Tsujimoto, Takamasa Asai
  • Patent number: 9713960
    Abstract: A power supply system and method for providing uninterrupted low voltage electrical power to control circuitry in an electric or hybrid-electric vehicle. A transformer includes a first primary side configured to receive a low voltage input from a vehicle battery and a second primary side configured to receive a rectified AC high voltage input. A first controller coupled to the low voltage input is operational to drive a first switching device to regulate a low voltage output using energy from the low voltage input when the rectified AC high voltage input is absent. A second controller connectable to the rectified AC high voltage input is operational to drive a second switching device to regulate the low voltage output using energy from the rectified AC high voltage input and deactivate or activate the first controller using a switching signal when the rectified AC high voltage input is present or absent, respectively.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: July 25, 2017
    Assignee: Lear Corporation
    Inventor: Zhonghui Bing
  • Patent number: 9696776
    Abstract: A switch circuit includes a voltage follower module, a comparison module and a switch module coupled to the voltage follower module, the comparison module and a power supply. The voltage follower can receive a first control signal and a second control signal. The comparison module can receive the first control signal and the second control signal. The comparison module compares a voltage of the first control signal and the second control signal with a reference voltage. When the comparison module outputs a first signal to turn on the switch module, the first power supply unit and the second power supply unit work in the first operation mode. When the comparison module outputs a second signal to turn off the switch module, the first power supply unit and the second power supply unit work in the second operation mode.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: July 4, 2017
    Assignees: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: Meng-Liang Yang
  • Patent number: 9673696
    Abstract: At least one embodiment provides a method for a nanopower boost regulator to startup from an ultra-low-voltage (such as 0.3V˜0.5V) for energy harvesting applications. The method does not necessarily require a special process or any external components such as mechanical switches. The startup circuit can include an asynchronous boost circuit to charge up an output with stacked power NMOS transistors, a ring oscillator, and/or a charge pump, along with accompanying circuitry.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: June 6, 2017
    Assignee: ANALOG DEVICES TECHNOLOGY
    Inventors: Yanfeng Lu, Bin Shao
  • Patent number: 9660518
    Abstract: A switching converter in which deterioration and breakage can be suppressed is provided. A switching converter whose area can be reduced is provided. The switching converter includes a switch connected to a power supply portion; a transformer connected to the power supply portion; a first rectifying and smoothing circuit and a second rectifying and smoothing circuit each connected to at least the transformer; and a switching control circuit which is connected to the first rectifying and smoothing circuit and the second rectifying and smoothing circuit and which controls operation of the switch. The switching control circuit includes a control circuit controlling on/off of the switch and operation of a starter circuit; and the starter circuit controlling startup of the control circuit. The starter circuit includes a transistor and a resistor each including a wide-gap semiconductor.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: May 23, 2017
    Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Masumi Nomura, Kosei Noda
  • Patent number: 9621021
    Abstract: The invention relates to the control of auxiliary power supply connected in parallel with a switch of a switching regulator. A switch and a diode are included within the connection to the auxiliary supply. The auxiliary supply switch enables a flow of current to the auxiliary supply when the auxiliary supply switch is on and the switch in parallel is off. The auxiliary diode prevents a reverse flow of current when the switch in parallel is on. The auxiliary power supply is suitable to supply of current in both stages of switching regulator operation, to configurations with a common node carrying either type of potential, steady or switching, provides supply of current at high efficiency in the switching stage of switching regulator operation, and provides high efficiency over a wide range of operating conditions of the switching regulator.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: April 11, 2017
    Assignee: Microchip Technology Inc.
    Inventors: Marc Tan, Alexander Mednik, Simon Krugly, Wilson Wai-Sum Chan
  • Patent number: 9564798
    Abstract: Disclosed is a display apparatus including an image processor configured to process an image signal, a display configured to display an image based on the image signal, a controller configured to control the display of the image, and a power supply configured to supply actuating power to the controller, the power supply including a power circuit configured to receive alternating current (AC) power and output the actuating power by a switching mode, a noise reducer configured to reduce high-frequency noise due to the switching mode, and a discharging circuit configured to supply a residual voltage of the noise reducer to the power circuit when the AC power is input, and discharge the residual voltage of the noise reducer when the AC power is shut off. Thus, it is possible to decrease power consumption caused when the residual voltage of the noise reducer is discharged.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: February 7, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-yong Joo, Jin-hyung Lee
  • Patent number: 9557757
    Abstract: Technologies are generally described for scaling a voltage regulator implemented as an integrated circuit (IC) that includes a power transistor configured to convert an input voltage to an output voltage, and a feedback loop configured to regulate the output voltage in response to a voltage change. At least one component of the voltage regulator may be selected for scaling, and a range of scaling factors may be identified for the component. An optimal coefficient may be determined for the scaling factors within the identified range through an empirical formulation and/or by running a circuit simulation based on parameters associated with voltage, load current, and load capacitance, for example. The optimal coefficient may be a coefficient that when applied to the component optimizes the performance of the IC and thus, the component may be scaled based on the optimal coefficient to achieve an optimized performance of the IC.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: January 31, 2017
    Assignee: Vivid Engineering, Inc.
    Inventors: Vladislav Potanin, Elena Potanina, George McLean, Pavel Biryulin
  • Patent number: 9537420
    Abstract: A method and apparatus for modifying power produced by a power converter. In one embodiment, the method comprises comparing a line voltage level to a first threshold and a second threshold, wherein the line voltage level is a level of a line voltage at an output of a power converter; and modifying power produced by the power converter by (i) a first modification when the line voltage level is between the first and the second thresholds, and (ii) a second modification when the line voltage level exceeds the second threshold.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: January 3, 2017
    Assignee: Enphase Energy, Inc.
    Inventors: Andrew Barnes, Tibor Bolfan
  • Patent number: 9535440
    Abstract: There are provided a DC-DC converter and an organic light emitting display device using the same. A DC-DC converter includes a converting module and a sensing unit. The converting module includes a switching module and a control module. The switching module has a plurality of switches, and each of the plurality of switches converts an input voltage into a first voltage and outputs the first voltage while being turned on/off in response to a corresponding pulse width modulation (PWM) signal. The control module controls a switching operation of the switching module by generating the PWM signal. The sensing unit senses driving current supplied to a load to which the first voltage is provided.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 3, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jeong-Min Seo, Sung-Cheon Park
  • Patent number: 9531156
    Abstract: A light source assembly includes multiple light emitters having output that are focused and mixed onto a optical fiber leading to an endoscope or other device. The emitters can be LEDs or solid state lasers that emit different colors. A driver circuit controls the relative output intensities of the light emitters so as to produce a desired light spectrum. A driver circuit includes a buck topology connected to a controller that provides current mode control. Pulse width modulation of the buck current is provided by a semiconductor switch across a solid state laser. A second order filter, formed by the an external inductor and the output capacitance of the buck topology, minimizes AC current ripple to the laser.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: December 27, 2016
    Assignee: Versatile Power, Inc.
    Inventors: David Hoffman, Alexandr Ikriannikov
  • Patent number: 9509210
    Abstract: For starting-up a power converter, an AC rectified voltage is generated upon power-up of the power converter. A depletion mode transistor generates a first voltage from the rectified voltage. The first voltage is inputted to a controller of the power converter to provide power for operation of the controller before an output stage of the power converter starts outputting power. A gate biasing voltage is generated from the first voltage and supplied to a gate terminal of the depletion mode transistor to bias the gate terminal of the depletion mode transistor.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: November 29, 2016
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Mohammad Al-Shyoukh, Percy Neyra
  • Patent number: 9496781
    Abstract: A soft start circuit for a switching converter, the soft start circuit has an internal soft start voltage generating circuit, an amplifier circuit and a buffer circuit, the internal soft start voltage generating circuit provides an internal soft start voltage, the amplifier circuit has a first input terminal receiving the internal soft start voltage, a second input terminal receiving a soft start reference signal and an output terminal, the buffer circuit has an input terminal coupled to the output terminal of the amplifier circuit and an output terminal providing the soft start reference signal. An external soft start capacitor coupled to the output terminal of the amplifier circuit is charged to provide an external soft start voltage, and the soft start reference signal is provided based on the internal soft start voltage and the external soft start voltage.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: November 15, 2016
    Assignee: CHENGDU MONOLITHIC POWER SYSTEMS CO., LTD.
    Inventor: Lei Li
  • Patent number: 9484832
    Abstract: An electronic system and method include a controller to actively control power transfer from a primary winding of a switching power converter to an auxiliary-winding of an auxiliary power supply. The switching power converter is controlled and configured such that during transfer of power to the auxiliary-winding, the switching power converter does not transfer charge to one or more secondary-windings of the switching power converter. Thus, the switching power converter isolates one or more secondary transformer winding currents from an auxiliary-winding current. By isolating the charge delivered to the one or more secondary-windings from charge delivered to the auxiliary-winding, the controller can accurately determine an amount of charge delivered to the secondary-windings and, thus, to a load.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: November 1, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: John L. Melanson, Prashanth Drakshapalli, Siddharth Maru
  • Patent number: 9484801
    Abstract: A power converter system includes first and second input terminals; a converter connected to the first and second input terminals and including an output terminal; a start-up circuit connected to a first capacitor and configured to charge the first capacitor during start-up and hiccup conditions; a voltage source connected to the first and second input terminals and configured to provide, during the start-up and hiccup conditions, a voltage proportional to a voltage applied to the first and second input terminals; and a voltage buffer including a MOSFET with a gate connected to the voltage source, a source connected to the start-up circuit, and a drain connected to one of the first and second input terminals.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: November 1, 2016
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Alexander Asinovski, Joseph Gonsalves, Conor Rochford
  • Patent number: 9450484
    Abstract: An AC-DC power converter includes a rectifying unit for generating a rectified voltage, an output stage for converting the rectified voltage into a DC voltage for a load, a controller for controlling the output stage, and a start-up circuit. The start-up circuit includes a start-up voltage generator coupled to the rectifying unit and configured to generate a start-up voltage from the rectified voltage and to output the start-up voltage to the controller to provide power for operation of the controller before the output stage starts outputting power. The start-up voltage generator includes a first depletion mode transistor having a first terminal configured to receive the rectified voltage, a second terminal configured to output at least partially the start-up voltage, and a gate terminal which is grounded.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: September 20, 2016
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Mohammad Al-Shyoukh, Percy Neyra
  • Patent number: 9431392
    Abstract: A transistor device includes at least one first type transistor cell including a drift region, a source region, a body region arranged between the source region and the drift region, a drain region, a gate electrode adjacent the body region and dielectrically insulated from the body region by a gate dielectric, and a field electrode adjacent the drift region and dielectrically insulated from the drift region by a field electrode dielectric. A gate terminal is coupled to the gate electrode, a source terminal is coupled to the source region, and a control terminal is configured to receive a control signal. A variable resistor is connected between the field electrode and the gate terminal or the source terminal. The variable resistor includes a variable resistance configured to be adjusted by the control signal received at the control terminal.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: August 30, 2016
    Assignee: Infineon Technologies Austria AG
    Inventors: Walter Rieger, Hans Weber, Michael Treu, Gerhard Nöbauer, Martin Pölzl, Martin Vielemeyer, Franz Hirler
  • Patent number: 9425682
    Abstract: An AC-DC power converter includes a rectifying unit for generating a rectified voltage, an output stage for converting the rectified voltage into a DC voltage for a load, a controller for controlling the output stage, and a start-up circuit. The start-up circuit includes a first power section coupled to the rectifying unit and configured to generate a first voltage from the rectified voltage and to output the first voltage to the controller to enable the controller before the output stage starts outputting power. The first power section includes a depletion mode transistor having a first terminal configured to receive the rectified voltage and a second terminal configured to output the first voltage.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: August 23, 2016
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Mohammad Al-Shyoukh, Percy Neyra
  • Patent number: 9419431
    Abstract: One example includes a power converter system. The system includes a switching circuit configured to activate at least one power supply switch in response to a driver signal to provide an output voltage at an output based on an input voltage at an input and based on an inductor current associated with an inductor. The at least one power supply switch includes a parasitic diode that interconnects the inductor and the output. The system also includes a short-circuit protection system configured to detect a short-circuit condition and to deactivate the at least one power supply switch in response to the detection of the short-circuit condition to provide the inductor current from the inductor to the output through the parasitic diode in response to the deactivation of the at least one power supply switch.
    Type: Grant
    Filed: May 14, 2014
    Date of Patent: August 16, 2016
    Assignee: TEXAS INSTRUMENTS DEUTSCHLAND GMBH
    Inventors: Franz Prexl, Mariangela De Martino
  • Patent number: 9391510
    Abstract: There is disclosed an envelope tracked power supply comprising a high bandwidth, low delay closed loop switch mode power supply stage comprising: a pulse width modulator for generating a width modulated pulse in dependence on an input signal and an output voltage of the switch mode power supply stage; a wideband transformer, having a winding of a first side connected to receive the modulated pulse, and a winding of a second side; and an output stage connected to the winding of the second side of the transformer, and for generating the output voltage in dependence on the modulated pulse induced in the winding of the second side.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: July 12, 2016
    Assignee: SNAPTRACK, INC.
    Inventor: Gerard Wimpenny
  • Patent number: 9362821
    Abstract: The present invention provides a power system and controlling method thereof. The power system includes: pulse width modulation (PWM) power source, voltage detection unit, current detection unit and feedback signal generation unit. PWM power source receives external DC input, performs PWM on received external DC input, and supplies PWM output obtained through PWM from the DC output terminal to a device expecting power supply. Voltage detection unit detects voltage amplitude of PWM output. Current detection unit detects current amplitude of PWM output. Feedback signal generation unit generates feedback signal and supplies generated feedback signal to PWM power source. PWM power source adjusts the voltage amplitude and current amplitude of the PWM output based on the received feedback signal.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: June 7, 2016
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Xueliang Yang
  • Patent number: 9318964
    Abstract: A power supply system includes: a switching power supply configured to convert an AC voltage from an AC power supply into predetermined DC voltages, and outputs the DC voltages; a switch circuit provided on an AC input line, the switch circuit being configured to be switched on and off and supply AC power to the power supply when the switch circuit is turned on; a low-capacity power supply circuit connected. to the AC input line at a front stage of the switch circuit, the low-capacity power supply circuit being configured to supply electric power to the switch circuit if the power supply is active and supply predetermined electric power if the power supply is not used; and a control device configured to receive the predetermined electric power from the low-capacity power supply circuit. When the power supply is not used, the control device turns off the switch circuit.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: April 19, 2016
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Katsumi Inukai
  • Patent number: 9298288
    Abstract: A driving apparatus of a display panel comprises a display panel for displaying an image according to an image signal; a DC-DC converter configured to output a voltage supplied from an external power source as a driving power source voltage for driving the display panel; a signal controller configured to generate a power supply enable signal for controlling an operation of the DC-DC converter and transfer it to the DC-DC converter; and a driving controller configured to determine an operation of the DC-DC converter according to a state of the driving power source voltage by receiving the driving power source voltage and comparing the received driving power source voltage with a pulse voltage of the power supply enable signal, and drive the DC-DC converter by adjusting the power supply enable signal in case the DC-DC converter is not operated.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: March 29, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sung-Cheon Park