Switched (e.g., On-off Control) Patents (Class 323/271)
  • Patent number: 9887637
    Abstract: An adjustable threshold power limiter circuit. A number of switching elements are included with at least a first and second switching element that each has a first terminal, a second terminal, and an insulated gate terminal. The switching elements forming a conductive path between its first and second terminals based on a voltage between its insulated gate terminal and one of its first or terminal exceeding a threshold. A conductive path is present with a series connection of the switching elements between a signal input and a reference potential. A controller is included and is electrically coupled to each insulated gate terminal of each switching element to independently provide to each insulated gate terminal either an on voltage or an off voltage.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: February 6, 2018
    Assignee: Tagore Technology, Inc.
    Inventors: Manish N. Shah, Sudhir Gouni, Amitava Das
  • Patent number: 9880574
    Abstract: A power combining technique includes receiving a first voltage at a first input and a second voltage at a second input. The power combining technique further includes combining, with at least two power converters, power received from the first and second inputs into a single power rail. A power balancing technique further includes controlling the at least two power converters such that a first one of the power converters outputs an amount of current to the single power rail that is proportional to and/or equal to the amount of current output by another of the power converters.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: January 30, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Jeffrey Anthony Morroni
  • Patent number: 9882472
    Abstract: In at least one embodiment there is provided a method for managing bulk capacitance of a power supply system. The method includes precharging first and second bulk capacitors of the power supply system to approximately a first output voltage level and a second output voltage level, respectively; receiving a first command signal to generate, by the power supply, the first output voltage level; coupling the first bulk capacitance to load circuitry coupled to the power supply; receiving a second command signal to generate, by the power supply, the second output voltage level; and coupling the second bulk capacitance to the load circuitry coupled to the power supply.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: January 30, 2018
    Assignee: INTEL CORPORATION
    Inventors: Nicholas P. Cowley, Ruchir Saraswat, Richard J. Goldman, David T. Bernard, Gordon J. Walsh, Michael Langan
  • Patent number: 9882477
    Abstract: A variable efficiency and response buck converter is achieved. The device includes a multi-phase switch, the coupled coils, the filter capacitor, and the load. The multi-phase switch includes the phase control inputs, the circuit common reference, at least two pairs of complementary switches with each switch containing one upper switch and one lower switch, at least two phase control outputs from the complementary switches. The coupled inductive coils are coupled to the phase control outputs to enable weak couplings and strong couplings. Based on the working mode, equivalently the coupled coils can provide strong mutual inductances and weak mutual inductances. The filter capacitors connected to the output of the coupled coils provide high efficiency output to the load.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: January 30, 2018
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Mark Childs
  • Patent number: 9866118
    Abstract: One embodiment includes a power supply system. The system includes a pulse-width modulation (PWM) system configured to generate a PWM signal. The system also includes a power stage comprising a gate driver, a high-side switch, and a low-side switch. The gate driver can be configured to alternately activate the high-side and low-side switches to provide an output signal to a load in response to the PWM signal, and to provide an activation dead-time between the alternate activation of the high-side and low-side switches. The system further includes a digital delay system configured to measure the activation dead-time and to add the measured activation dead-time to the activation of the high-side switch.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: January 9, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Adam L. Shook
  • Patent number: 9843259
    Abstract: A circuit including: a three-level buck converter having: a plurality of input switches and an inductor configured to receive a voltage from the plurality of input switches, the plurality of input switches coupled with a first capacitor and configured to charge and discharge the first capacitor; a second capacitor at an output of the buck converter; and a switched capacitor at an input node of the inductor, wherein the switched capacitor is smaller than either the first capacitor or the second capacitor.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: December 12, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Chuang Zhang, James Thomas Doyle, Farsheed Mahmoudi, Amirali Shayan Arani
  • Patent number: 9831863
    Abstract: Some embodiments include apparatus and methods having a node to provide a signal, and a control unit arranged to control a value of an output voltage at an output node on an output path based on a duty cycle of the signal and a value of an input voltage. The control unit can also be arranged to cause a change in a resistance on the output path in order to determine a value of a current on the output path based at least on the change in the resistance.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: November 28, 2017
    Assignee: Intel Corporation
    Inventors: Santosh Nene, Tarun Mahajan, Venkataraman Srinivasan, Ramnarayanan Muthukaruppan
  • Patent number: 9819202
    Abstract: A battery charging apparatus for charging batteries of fixed voltage charge receiving batteries and flexible voltage charge receiving batteries. A wall receptacle charger outlet, an “all-in-one” vehicle or home charger, a hands-free docking station charger, a wall mountable USB charging strip and a holder for multiple charger receiving devices that includes a charger are disclosed.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: November 14, 2017
    Assignee: MAGNADYNE CORPORATION
    Inventors: Barry L. Caren, Wen-Tsan Yeh
  • Patent number: 9812957
    Abstract: A DC/DC converter (100) includes a voltage conversion unit (20) having an input node to receive an input voltage and an output node to output an output voltage and configured to convert the input voltage to the output voltage to output the output voltage from the output node, and an electrical energy storage unit (GC2) including a first electrode to be a positive electrode and a second electrode to be a negative electrode. The first electrode is electrically connected to the input node of the voltage conversion converter. The DC/DC converter (100) further includes a switching unit (S1) configured to electrically connect the second electrode of the electrical energy storage unit to one of ground and the output node of the voltage conversion unit alternatively. The switching unit (S1) connects the second electrode of the electrical storage unit (GC2) to the output node when the input voltage is lower than a predetermined voltage.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: November 7, 2017
    Assignee: THOMSON LICENSING
    Inventor: Jiangbin Zhu
  • Patent number: 9806523
    Abstract: A switching circuit for extracting power from an electric power source includes (1) an input port for electrically coupling to the electric power source, (2) an output port for electrically coupling to a load, (3) a first switching device configured to switch between its conductive state and its non-conductive state to transfer power from the input port to the output port, (4) an intermediate switching node that transitions between at least two different voltage levels at least in part due to the first switching device switching between its conductive state and its non-conductive state, and (5) a controller for controlling the first switching device to maximize an average value of a voltage at the intermediate switching node.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: October 31, 2017
    Assignee: Volterra Semiconductor LLC
    Inventors: Anthony J. Stratakos, Michael D. McJimsey, Ilija Jergovic, Alexandr Ikriannikov, Artin Der Minassians, Kaiwei Yao, David B. Lidsky, Marco A. Zuniga, Ana Borisavljevic
  • Patent number: 9798340
    Abstract: A circuit is provided with inrush current protection through control of the output current at start-up by a current source that does not rely on the output capacitor and which provides a smooth transition from a controlled current mode during a start-up phase to a voltage regulation mode.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: October 24, 2017
    Assignee: Dialog Semiconductor GmbH
    Inventors: Ambreesh Bhattad, Frank Kronmueller
  • Patent number: 9786773
    Abstract: B-TRAN bipolar power transistor devices and methods, using a drift region which is much thinner than previously proposed double-base bipolar transistors of comparable voltage. This is implemented in a high-bandgap semiconductor material (preferably silicon carbide). Very high breakdown voltage, and fast turn-off, are achieved with very small on-resistance.
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: October 10, 2017
    Assignee: Ideal Power, Inc.
    Inventor: William C. Alexander
  • Patent number: 9778671
    Abstract: An integrated regulator, in particular a voltage regulator, for a personal protection arrangement in a vehicle, includes a regulating element that converts an input signal into an output signal having a defined value, and a control application circuit that applies control to the regulating element to generate the output signal having the defined value. The control application circuit outputs the output signal via the regulating element with at least two different selectable values as a function of a specifying signal, such that for selection of the value of the output signal, a configuration circuit receives at least one configuration signal and, as a function of a configuration ascertained in the context of evaluation, selects one of at least two different specifying signals and applies it to the control application circuit to output the output signal having the selected value.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: October 3, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventors: Carsten List, Hartmut Schumacher, Falko Sievers
  • Patent number: 9780653
    Abstract: A DC-DC converter having a coupling network is provided, in which the coupling network is so configured as to forcibly add a noise source to a feedback output voltage of the DC-DC converter. The coupling network includes one coupling resistor and two coupling capacitors to include the switching voltage of a power switch and inductor output voltage into the output voltage, and transmit the result together with the feedback output voltage to the comparator. Accordingly, it is easier to compare the reference voltage and the feedback voltage, and stably maintain the output voltage of the DC-DC converter operating in constant on-time (COT).
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: October 3, 2017
    Assignee: Magnachip Semiconductor, Ltd.
    Inventors: Tim Yu, Greg Wardle
  • Patent number: 9772636
    Abstract: Controlling the output voltage of a power supply involve determining a remote load coupled to the power supply and setting the output voltage based on the determined remote load and a predetermined maximum current for the power supply. The remote load may be measured, for example, by applying a predetermined current to the load, measuring the voltage across the load, and computing the effective load (resistance) value based on the supplied current and the measured voltage. Such measurement may be done using an analog-to-digital converter.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: September 26, 2017
    Assignee: Analog Devices, Inc.
    Inventor: Colm F. Slattery
  • Patent number: 9768689
    Abstract: Thermal levels in an inductor of a boost converter may be managed by implementing peak current limits for the boost converter. For example, an inductor may be allowed to conduct above a certain peak current limit for a certain period of time before the current is reduced by a controller to a low current limit. The controller may hold the low current limit in place for a certain period of time, after which the current through the inductor is allowed to again exceed the low current limit. However, if the high current limit is again exceeded or sustained for a certain period of time, the low current limit may be again imposed by the controller.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: September 19, 2017
    Assignee: CIRRUS LOGIC, INC.
    Inventors: Ullas Pazhayaveetil, Jeffrey May, Gautham D. Kamath, Michael Kost
  • Patent number: 9762219
    Abstract: A switched driver for a power supply includes a high-side switch and a low-side switch coupled to the high-side switch. An output is coupled between the high-side switch and the low-side switch. A switch controller is coupled to either the high-side switch or the low-side switch and has a switch controller input for receiving a switch control signal and an output for controlling a switch. The switch controller initially reduces the resistance of the switch, increases the resistance of the switch, and then reduces the resistance of the switch in response to a signal received at the input.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: September 12, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Nathan Schemm, Rajarshi Mukhopadhyay
  • Patent number: 9755519
    Abstract: A switching power converter with good stability and transient response is presented. There is provided a controller for a switching power converter of the type comprising one or more power switches. The controller contains a pulse width modulation comparator arranged to output a digital control signal to control the power switches of the switching power converter. A first input of the pulse width modulation comparator is derived from an output voltage of the switching power converter via a first feedback path. A second input of the pulse width modulation comparator is derived from the output voltage of the switching power converter via a second feedback path. One of the feedback paths has a signal extractor and a differential amplifier arranged to filter the output voltage and to provide good ground noise rejection.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: September 5, 2017
    Assignee: PowerVenture Semiconductor Limited
    Inventor: Chi-Chia Huang
  • Patent number: 9755548
    Abstract: A bootstrap compensation circuit includes: a plurality of resistors series-connected between a floating potential corresponding to a high-voltage-side potential and a reference potential; a second capacitor that has one end connected to a divided potential extraction point and has the other end connected to the reference potential, the divided potential extraction point located between the plurality of resistors; and an output circuit which supplies current to a first capacitor, according to a potential of the divided potential extraction point.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: September 5, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroshi Yoshida, Kyoko Oyama
  • Patent number: 9755515
    Abstract: In one embodiment, a switching regulator includes an inductor, a first switch, and a second switch. The first and second switches generate current in the inductor. Inductor current may flow through the second switch with both a positive and negative polarity. Voltages on terminals of the second switch may be sensed, and an offset applied to generate a level shifted signal. In one embodiment, the switching regulator is a boost switching regulator, and the offset is generated using a current source. Matched MOS transistor switches may be used to couple voltages on terminals of the second switch to amplifier inputs, and the offset is introduced across an MOS switch coupled between one amplifier input and the output.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: September 5, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Joseph Rutkowski, Yikai Wang, Jiwei Chen
  • Patent number: 9742395
    Abstract: The present application teaches, inter alia, methods and circuits for operating a B-TRAN (double-base bidirectional bipolar junction transistor). Exemplary base drive circuits provide high-impedance drive to the base contact region on the side of the device instantaneously operating as the collector. (The B TRAN is controlled by applied voltage rather than applied current.) Current signals operate preferred implementations of drive circuits to provide diode-mode turn-on and pre-turnoff operation, as well as a hard ON state with low voltage drop (the “transistor-ON” state). In some preferred embodiments, self-synchronizing rectifier circuits provide adjustable low voltage for gate drive circuits. In some preferred embodiments, the base drive voltage used to drive the c-base region (on the collector side) is varied while base current at that terminal is monitored, so no more base current than necessary is applied. This solves the difficult challenge of optimizing base drive in a B-TRAN.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: August 22, 2017
    Assignee: Ideal Power Inc.
    Inventors: William C. Alexander, Richard A. Blanchard
  • Patent number: 9742280
    Abstract: In order to accelerate the response of buck converters to load transients buck converters having asymmetric phase designs having a load step detection are used. When a relatively large and fast load step is detected, the clock frequency of “fast”valley mode phases is reduced, which are populated with fast, low value inductors. The clock frequency is returned to its normal rate when the current in the “slow” phases has reached a suitable level.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: August 22, 2017
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Mark Childs, Jens Masuch
  • Patent number: 9735681
    Abstract: A voltage converter is provided. The voltage converter includes a compensation circuit, a first comparator circuit, a first inductor, a first driver circuit, and a phase-lag circuit. The compensation circuit generates a first compensation signal according to a loading state of the voltage converter. The first comparator circuit compares the first compensation signal and a first reference signal to generate a first comparison signal. The first driver circuit generates a first driving voltage to the first inductor according to the first comparison signal. The phase-lag circuit is coupled between the first comparison circuit and the first driver. The phase-lag circuit modifies a duty of the first comparison signal for changing a first inductor current following the first inductor.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: August 15, 2017
    Assignee: MEDIATEK INC.
    Inventors: Chien-Wei Kuan, Yen-Hsun Hsu, Tun-Shih Chen
  • Patent number: 9727072
    Abstract: Photovoltaic system maximum power point tracking methods and apparatus are disclosed. Output power samples from one or more photovoltaic (PV) cells are obtained. The output power samples include perturbed samples for which a perturbation is applied to an operating voltage or current of the PV cell(s) and non-perturbed samples for which no perturbation is applied to the operating voltage or current. A control output, to change the operating voltage or current of the PV cell(s) for a next perturbed sample by a next perturbation, is generated. The next perturbation could be based on an estimated change in output power due to a previous perturbation. The next perturbation could also or instead be in a direction based on a change in output power samples, and of a magnitude based on the direction and a direction of perturbations applied for one or more perturbed samples preceding the next perturbed sample.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: August 8, 2017
    Assignee: SOLANTRO SEMICONDUCTOR CORP.
    Inventor: Tudor Lipan
  • Patent number: 9705554
    Abstract: Circuits, devices and methods for achieving fast changes in voltage regulator outputs. In some embodiments, a voltage regulation system can include a voltage regulator configured to receive an input voltage Vin and generate an output voltage Vout at an output node, and to transition Vout between V1 and V2. The voltage regulation system can further include a transition circuit coupled to the output node. The transition circuit can include a first voltage source that is switchably coupled to the output node and configured to provide a voltage associated with one of the V1 and V2 voltages to the output node during at least the transition of the voltage regulator. The voltage provided by the first voltage source can be substantially equal to one of the V1 and V2 voltages.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: July 11, 2017
    Assignee: Skyworks Solutions, Inc.
    Inventors: Thomas Zoki Li, Lui Lam, Ghader Razmafrouz
  • Patent number: 9696350
    Abstract: Described is an apparatus having a non-linear control to manage power supply droop at an output of a voltage regulator. The apparatus comprises: a first inductor for coupling to a load; a capacitor, coupled to the first inductor, and for coupling to the load; a first high-side switch couple to the first inductor; a first low-side switch coupled to the first inductor; a bridge controller to control when to turn on and off the first high-side and first low-side switches; and a non-linear control (NLC) unit to monitor output voltage on the load, and to cause the bridge controller to turn on the first high-side switch and turn off the first low-side switch when a voltage droop is detected on the load.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: July 4, 2017
    Assignee: Intel Corporation
    Inventors: Edward A. Burton, Gerhard Schrom, Michael W. Rogers, Alexander Lyakhov, Ravi Sankar Vunnam, Jonathan P. Douglas, Fabrice Paillet, J. Keith Hodgson, William Dawson Kesling, Chiu Keung Tang, Narayanan Raghuraman, Narayanan Natarajan, Samie Samaan, George Geannopoulos
  • Patent number: 9679999
    Abstract: A two-surface bidirectional power bipolar transistor is constructed with a two-surface cellular layout. Each emitter/collector region (e.g. doped n-type) is a local center of the repeated pattern, and is surrounded by a trench with an insulated field plate, which is tied to the potential of the emitter/collector region. The outer (other) side of this field plate trench is preferably surrounded by a base connection region (e.g. p-type), which provides an ohmic connection to the substrate. The substrate itself serves as the transistor's base.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: June 13, 2017
    Assignee: Ideal Power, Inc.
    Inventor: Richard A. Blanchard
  • Patent number: 9673702
    Abstract: A switching mode power supply (SMPS) is capable of clearing an overvoltage condition. The overvoltage is determined by detecting that the output voltage has exceeded the input voltage by a limited amount. The overvoltage is cleared by repetitively turning on and then off the switches controlling the flow of energy to the SMPS in sequence until the excess charge resulting from the overvoltage is couple to circuit ground, and the output is reduced to within acceptable limits.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: June 6, 2017
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Mark Childs, Paul Collins
  • Patent number: 9660530
    Abstract: A booster for a digital circuit block provides speed and reliability at lower static power supply voltages, reducing overall power consumption of the circuits. The booster includes a transistor that couples a dynamic power supply node to a static power supply and is disabled in response to a boost clock. An inductor and capacitance, which may be the block power supply shunt capacitance, coupled to the dynamic power supply resonates so that the voltage of the dynamic power supply increases in magnitude to a value greater the static power supply voltage. A boost transistor is included in some embodiments to couple an edge of the clock to the dynamic power supply, increasing the voltage rise. Another aspect of the booster includes multiple boost transistors controlled by different boost clock phases so that the resonant boost circuit is successively stimulated to increase the amount of voltage rise.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: May 23, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Rajiv V. Joshi, Matthew M. Ziegler
  • Patent number: 9654008
    Abstract: A regulator circuit includes a regulator output node, at least (N+1) regulator control circuits, and N drivers. N is an integer greater than 1. Each one of the N drivers includes a multiplexer, a driver stage, and a pre-driver stage. The multiplexer includes an input port and an output port, where the input port of the multiplexer is coupled with output nodes of the at least (N+1) regulator control circuits. The driver stage is coupled with the regulator output node. The pre-driver stage is configured to control the driver stage based on a signal on the output port of the multiplexer.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: May 16, 2017
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Alan Roth, Eric Soenen, Russell Kinder
  • Patent number: 9647544
    Abstract: A magnetic component has a core on which windings are wound. The windings are electrically connected in series to constitute a coil of a first reactor. The winding constitutes a coil of a second reactor. The core has a leg portion on which the winding is wound, a leg portion on which the winding is wound, and a leg portion on which the winding is wound. When a current flows through the windings, magnetic fluxes produced from the windings, respectively, and flowing through the winding counteract each other. Furthermore, when a current flows through the winding, induced voltages produced from the windings, respectively, by the magnetic flux produced by the winding counteract each other.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: May 9, 2017
    Assignees: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masanori Ishigaki, Shuji Tomura, Takaji Umeno, Masaki Okamura, Daigo Nobe
  • Patent number: 9641075
    Abstract: Embodiments of current feedback circuits for Direct Current (DC)-DC converters and methods for operating current feedback circuits for DC-DC converters are described. In one embodiment, a current feedback circuit for a DC-DC converter includes a current replication circuit configured to provide current feedback to the DC-DC converter based on an on-time of the DC-DC converter and an alternating current (AC)-coupling circuit configured to add the current feedback to a regulation circuit of the current feedback circuit and to remove a DC voltage from the current replication circuit. The regulation circuit includes a filter circuit configured to compensate for an offset of an output voltage of the DC-DC converter caused by the current feedback. Other embodiments are also described.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: May 2, 2017
    Assignee: NXP B.V.
    Inventors: Ralf Beier, Gerhard Osterloh, Rodrigo Mora-Sanchez
  • Patent number: 9634552
    Abstract: A solid state power transformer is described for converting an input power signal at a first phase or voltage to an output signal of a second voltage or opposite phase by the use of bidirectional solid state switches switched at a high carrier frequency to produce a double-sideband, suppressed-carrier representation of the input power signal, which is then synchronously demodulated using further similar switches to produce the desired output. It is further disclosed that multiple instances of the above with relative phase-staggering of the switching frequency may be operated in parallel and activated or deactivated according to output current demand to provide maximum efficiency over a wide range of current and power levels.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: April 25, 2017
    Inventor: Paul Wilkinson Dent
  • Patent number: 9627973
    Abstract: A highly efficient and low-cost switching power supply device includes a high withstand voltage transistor and a low withstand voltage transistor. When current flows from a second node to a first node, the high withstand voltage transistor turns on and the low withstand voltage transistor turns off, causing current to flow through a built-in diode of the low withstand voltage transistor. Since current does not flow through the parasitic diode of the high withstand voltage transistor, the recovery current is reduced. Furthermore, since a first delay circuit including resistors and a diode is connected to the gate electrode of the high withstand voltage transistor, and a second delay circuit including resistors and a diode is connected to the gate electrode of the low withstand voltage transistor, precise adjustment of the switching speed during switching operation is possible, and losses are reduced.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: April 18, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Akihide Shibata, Shuji Wakaiki, Kohtaroh Kataoka, Takeshi Shiomi, Hiroki Igarashi, Hiroshi Iwata
  • Patent number: 9590501
    Abstract: The present disclosure is directed to a fast load transient response power supply system using dynamic reference voltage generation. A system may comprise, for example, at least power supply circuitry, voltage reference circuitry and dynamic reference generation circuitry. The power supply circuitry may be configured to generate an output voltage (e.g., for driving a load) based on a power supply input voltage. The voltage reference circuitry may be configured to generate a reference voltage for use in controlling the generation of the output voltage. The dynamic reference generation circuitry may be configured to generate a dynamic reference voltage as the input voltage for the power supply circuitry based on the reference voltage and the output voltage.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: March 7, 2017
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Bin Zhao, Siqiang Fan
  • Patent number: 9584005
    Abstract: Systems and methods are provided for regulating a power conversion system. An example system controller includes: a signal generator configured to receive a converted signal and a first compensation signal and generate a second compensation signal based at least in part on the converted signal and the first compensation signal, the converted signal being associated with an input signal for a power conversion system; a modulation component configured to receive the second compensation signal and a ramping signal and generate a modulation signal based at least in part on the second compensation signal and the ramping signal; and a drive component configured to receive the modulation signal and output a drive signal based at least in part on the modulation signal to a switch to affect the first current, the drive signal being associated with an on-time period, the switch being closed during the on-time period.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: February 28, 2017
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Lieyi Fang, Jun Zhou, Qian Fang
  • Patent number: 9577518
    Abstract: The present invention discloses a voltage control method. First, the load voltage of the load is divided to generate a feedback voltage. Then, an absolute value of a periodic triangular wave signal is retrieved to generate a positive feedback signal, which and the feedback voltage are then combined to produce a sum signal. The sum signal is then compared with a target voltage and when the sum signal is less than the target voltage, a control signal is generated and thus the load voltage is updated and stabilized using an input voltage. In an alternative method, the feedback voltage and the periodic triangular wave signal are combined to generate a sum signal, which is compared with the target voltage. When sum signal is less than the target voltage, a control signal is generated and thus the load voltage is for updated and stabilized using an input voltage.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: February 21, 2017
    Assignee: Alpha & Omega Semiconductor (Cayman), Ltd.
    Inventors: Kong Soon Ng, Wei-Chi Huang, Jean-Shin Wu
  • Patent number: 9570927
    Abstract: GaN-based half bridge power conversion circuits employ control, support and logic functions that are monolithically integrated on the same devices as the power transistors. In some embodiments a low side GaN device communicates through one or more level shift circuits with a high side GaN device. Both the high side and the low side devices may have one or more integrated control, support and logic functions. Some devices employ electro-static discharge circuits and features formed within the GaN-based devices to improve the reliability and performance of the half bridge power conversion circuits.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: February 14, 2017
    Assignee: Navitas Semiconductor, Inc.
    Inventors: Daniel M. Kinzer, Santosh Sharma, Ju Jason Zhang
  • Patent number: 9568932
    Abstract: A household appliance (1) is provided with an electronic command device (3) for reducing standby-state energy consumption of the electric household appliance (1). The electronic command device (3) includes an electronic control unit (20) and a switching mode low power supply unit (6) designed to supply a predetermined supply voltage (VB) to the electronic control unit (20). The switching mode low power supply unit (6) has at least a first control terminal (12) and at least an output terminal (9) supplying the main prefixed supply voltage (VB) to the electronic control unit (20). The switching mode low power supply unit (6) is further configured to switch from a operating state to a standby state, when the first control terminal (12) receives a command signal (Soff). The electronic control unit (20) has a sensing terminal (23) and is configured to generate the command signal (Soff) when it detects a predetermined voltage variation on the sensing terminal (23).
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: February 14, 2017
    Assignee: Electrolux Home Products Corporation N.V.
    Inventor: Giuliano Lovisotto
  • Patent number: 9553539
    Abstract: At least one example embodiment discloses a method of generating an output variable voltage. The method includes obtaining a selected mode of operation, the selected mode of operation being one of an voltage control mode and a frequency mode, determining an input voltage command based on the selected mode of operation, determining an input frequency command based on the selected mode of operation, adjusting at least one of the input frequency command and the input voltage command based on the selected mode of operation, generating a pulse width modulation reference based on the adjusted at least one of the input frequency command and the input voltage command and generating the output variable voltage based on the pulse width modulation reference.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: January 24, 2017
    Assignee: DEERE & COMPANY
    Inventors: Oleg Vodyakho, Kent Wanner
  • Patent number: 9548728
    Abstract: A time signal generating circuit and a time signal generating method are provided. The time signal generating method includes following steps: receiving a feedback voltage and a reference voltage to provide a first control signal, wherein the feedback voltage is related to an output voltage of a power converter; receiving an input voltage and a default voltage to provide a second control signal; and adjusting an on-time of a pulse width modulation signal according to the first control signal and the second control signal.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: January 17, 2017
    Assignee: uPI Semiconductor Corp
    Inventor: Kun-Min Huang
  • Patent number: 9525348
    Abstract: A converter for connecting a voltage source to a load includes a plurality of ICBT (integrated capacitor blocked transistor) cells configured as switches and connected in series to form a series connection path, a main capacitor connected across the series connection path, and a controller. Each ICBT cell includes a main transistor disposed in the series connection path and a series connected auxiliary transistor and auxiliary capacitor coupled in parallel with the main transistor. The controller is operable to develop a voltage across the main capacitor which exceeds a voltage rating of the ICBT cells, by switching the ICBT cells so as to commutate current within the individual ICBT cells without the ICBT cells providing active power to the load so that power flow is from the voltage source, to the main capacitor, to the load and not through the auxiliary transistors and the auxiliary capacitors.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: December 20, 2016
    Assignee: ABB Schweiz AG
    Inventors: Eddy Aeloiza, Francisco Canales, Rolando Burgos
  • Patent number: 9496852
    Abstract: Some embodiments include apparatus and methods having a node to provide a signal, and a control unit arranged to control a value of an output voltage at an output node on an output path based on a duty cycle of the signal and a value of an input voltage. The control unit can also be arranged to cause a change in a resistance on the output path in order to determine a value of a current on the output path based at least on the change in the resistance.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: November 15, 2016
    Assignee: Intel Corporation
    Inventors: Santosh Nene, Tarun Mahajan, Venkataraman Srinivasan, Ramnarayanan Muthukaruppan
  • Patent number: 9496792
    Abstract: A controller used in a multi-phase switching converter, including: a bias current generator that generates a plurality of bias current signals; a temperature balance modulating circuit that generates a plurality of on time signals based on the plurality of the bias current signals; and a logic circuit that generates a plurality of control signals based on the plurality of on time signals. The plurality of the control signals is used to control a plurality of switching circuits of the multi-phase switching converter.
    Type: Grant
    Filed: June 28, 2014
    Date of Patent: November 15, 2016
    Assignee: CHENGDU MONOLITHIC POWER SYSTEMS CO., LTD.
    Inventor: Qian Ouyang
  • Patent number: 9471077
    Abstract: Compensation capacitor voltages of DC-to-DC converters are pre-set without switching to enable smooth transition from sleep mode to active mode. Appropriate compensation capacitor voltages are set regardless of the length of no-switching sleep period or input voltage change. Therefore the converter can always start with appropriate error amplifier and duty conditions, and avoid output voltage disturbance when the PWM control loop takes over in active mode the control of buck converter. The appropriate capacitor voltages are enabled by creating a local PWM feedback loop of a PWM control loop without enabling the output stage. This local PWM feedback loop works intermittently and always sets the appropriate voltage for the error amplifier and compensation capacitor.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: October 18, 2016
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Hidenori Kobayashi
  • Patent number: 9473073
    Abstract: A voltage converter can be switched among two or more modes to produce an output voltage tracking a reference voltage that can be of an intermediate level between discrete levels corresponding to the modes. One or more voltages generated from a power supply voltage, such as a battery voltage, can be compared with the reference voltage to determine whether to adjust the mode. The reference voltage can be independent of the power supply voltage.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: October 18, 2016
    Assignee: Skyworks Solutions, Inc.
    Inventors: Hui Liu, David Steven Ripley
  • Patent number: 9455632
    Abstract: A voltage converter including a constant turned-on time signal generator, a first transistor, a second transistor, an inductor, a ripple signal compensator, and a ripple injection circuit is provided. The ripple signal compensator is coupled to an output terminal of the voltage converter and a second terminal of the first transistor, and generates an adjusted ripple signal according to a switching voltage on a second terminal of the first transistor and an output signal of the voltage converter. The ripple rejection circuit generates a ripple injection signal according to the adjusted ripple signal. Wherein, the constant turned-on time signal generator generates a first and second driving signals for respectively driving the first and second transistors according to the ripple injection signal.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: September 27, 2016
    Assignee: Excelliance MOS Corporation
    Inventors: Meng-Ju Hsieh, Pao-Chuan Lin
  • Patent number: 9444336
    Abstract: A switching regulator includes a load determination circuit. The load determination circuit feeds, to an offset voltage generation circuit, a different load determination signal at the time of light load or at the time of heavy load. The offset voltage generation circuit applies an offset voltage corresponding to whether a load is light or heavy to the inverting input terminal of a PWM comparator to acquire the responsiveness and the stability of the switching regulator.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: September 13, 2016
    Assignee: Rohm Co., Ltd.
    Inventor: Yosuke Fukumoto
  • Patent number: 9436205
    Abstract: An apparatus and method for a voltage reference circuit and oscillator which operates for a low voltage power supply. The voltage reference circuit is used in an “always on” mode of operation, and have low power usage. The operational range is 1.1V to 3.6 V, and must allow for sub-bandgap voltage conditions as well as voltage tolerant for higher voltages. The circuit minimizes the number of current branches by avoiding complexity of operational amplifiers and comparator networks. The circuit avoids stacking of more than 2 devices to allow for low voltage operation.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: September 6, 2016
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Guillaume De Cremoux
  • Patent number: 9431890
    Abstract: Apparatuses and methods for providing output power are disclosed. In an example method, a control signal is received at an output stage. The control signal may be provided by a control circuit. The method further includes providing a first power to a filter responsive to the received control signal having a first value, and providing a second power to the filter responsive to the received control signal having a second value. The method further includes decoupling the first power and second power from the filter responsive to the received control signal having a third value.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: August 30, 2016
    Assignee: Micron Technology, Inc.
    Inventor: Shaun A. Stickel