Switched (e.g., On-off Control) Patents (Class 323/271)
  • Publication number: 20150130476
    Abstract: A direct-current regulator includes: a fuse, a high-side switch, and a low-side switch connected in series between a high potential side input voltage terminal and a low potential side input voltage terminal; and a control unit configured to control the high-side switch and the low-side switch, wherein the fuse is formed on a silicon substrate on which the high-side switch is formed, and the fuse includes: two electrodes separately formed on the silicon substrate; a plurality of band-shaped polysilicon films formed between the two electrodes; and a linking part of a polysilicon film provided so as to connect the neighboring band-shaped polysilicon films at intermediate portions.
    Type: Application
    Filed: September 25, 2014
    Publication date: May 14, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Yoshimasa TAKAHASHI, Yuji UCHIYAMA
  • Publication number: 20150130430
    Abstract: An output switching circuit includes a switching circuit having a first transistor connected to a high-voltage power supply, a second transistor connected to a low-voltage power supply, and an output s terminal at a connection node between the first and second transistors; a comparison unit that compares an input signal with a feedback signal obtained by feedback of an output signal of the output terminal via a low-pass filter to generate a comparison signal; and a drive pulse generating unit that generates first drive pulses for driving the first transistor and second drive pulses for driving the second transistor in accordance with the comparison signal.
    Type: Application
    Filed: January 16, 2015
    Publication date: May 14, 2015
    Applicant: Spansion LLC
    Inventors: Takeshi WAKII, Akihito YOSHIOKA
  • Publication number: 20150130428
    Abstract: A level shift circuit and a DC-DC buck converter controller for using the same are disclosed. The level shift circuit is capable of detecting a state of a converting circuit, and avoids a current leakage when determining that the converting circuit is operating under a light-load. Therefore, the level shift circuit and the DC-DC converting controller provided by the present invention can reduce power consumption under the light-load and have power-saving advantage.
    Type: Application
    Filed: March 9, 2014
    Publication date: May 14, 2015
    Applicant: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min LEE, Chao SHAO, Quan GAN, Yuan CAI
  • Patent number: 9030180
    Abstract: In order to provide a switching regulator having high efficiency even under light load, the switching regulator is configured so that ON/OFF of a switching element is controlled by an output signal of an oscillation circuit having an oscillation frequency controlled by an output signal from an error amplifier. Thereby, the oscillation frequency can be suppressed under light load, thus reducing a switching loss.
    Type: Grant
    Filed: June 1, 2012
    Date of Patent: May 12, 2015
    Assignee: Seiko Instruments Inc.
    Inventors: Michiyasu Deguchi, Kenji Yoshida
  • Patent number: 9030177
    Abstract: A ripple-control switched-mode power supply includes a control circuit to switch on/off a drive switching element. The control circuit includes a simulated voltage generation circuit that smoothes a voltage at a node connecting the drive switching element and an inductor and that generates a simulated voltage corresponding to an output voltage; a timer that measures a time corresponding to an input voltage and the simulated voltage; a voltage comparison circuit that compares a feedback voltage and a predetermined voltage; and a control pulse generation circuit that generates a control pulse having a pulse width corresponding to the time based on outputs from the timer and the voltage comparison circuit. The control circuit varies the pulse width of the control pulse in accordance with a variation in the input voltage to maintain a constant switching cycle.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: May 12, 2015
    Assignee: Mitsumi Electric Co., Ltd.
    Inventor: Heisuke Nakashima
  • Patent number: 9029909
    Abstract: Methods, systems, circuits, and devices for power-packet-switching power converters using bidirectional bipolar transistors (BTRANs) for switching. Four-terminal three-layer BTRANs provide substantially identical operation in either direction with forward voltages of less than a diode drop. BTRANs are fully symmetric merged double-base bidirectional bipolar opposite-faced devices which operate under conditions of high non-equilibrium carrier concentration, and which can have surprising synergies when used as bidirectional switches for power-packet-switching power converters. BTRANs are driven into a state of high carrier concentration, making the on-state voltage drop very low.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: May 12, 2015
    Assignee: Ideal Power Inc.
    Inventors: Richard A. Blanchard, William C. Alexander
  • Publication number: 20150123631
    Abstract: In one embodiment, a method of over voltage protection control can include: (i) determining whether an output voltage of a buck-boost converter is in an over voltage condition, where the buck-boost converter includes a first switch coupled to an input terminal and an inductor, a second switch coupled to ground and a common node of the first switch and the inductor, a third switch coupled to ground and a common node of a fourth switch and the inductor, where the fourth switch is coupled to an output terminal of the buck-boost converter; and (ii) simultaneously controlling the first, second, third, and fourth switches in the buck-boost converter by turning on the second and third switches, and turning off the first and fourth switches, in response to the over voltage condition.
    Type: Application
    Filed: November 5, 2014
    Publication date: May 7, 2015
    Inventors: Kailang Hang, Liangwei Sun
  • Publication number: 20150123630
    Abstract: In one implementation, a voltage converter includes a driver providing a gate drive for a power switch and a sense circuit coupled across the power switch. The gate drive provides power to the sense circuit, and the sense circuit provides a sense output to the driver corresponding to a current through the power switch. In one implementation, the sense circuit includes a high voltage (HV) sense transistor coupled between a first sense input and a sense output, a delay circuit configured to be coupled to the gate drive to provide power to the HV sense transistor when the gate drive is high, and a pull-down transistor configured to couple the sense output to a second sense input when the gate drive is low.
    Type: Application
    Filed: September 19, 2014
    Publication date: May 7, 2015
    Inventor: Thomas J. Ribarich
  • Publication number: 20150123632
    Abstract: A DC-to-DC converter includes first and second switches connected to each other at a node and biased by PWM pulses. A timing module determines a first time difference between a first edge of a first signal at the node and a first edge of a second signal at a control terminal of the first switch, and a second time difference between a second edge of the first signal and a second edge of the second signal. The first and second edges of the second signal correspond to first and second edges of one of the PWM pulses, respectively. A delay module delays the first and second edges of the second signal based on the first and second time differences, respectively. The delay module delays an edge of one of the PWM pulses based on an amount of change in a voltage output by a charge pump.
    Type: Application
    Filed: January 12, 2015
    Publication date: May 7, 2015
    Inventors: Serhii M. Zhak, Brett A. Miwa
  • Publication number: 20150123629
    Abstract: In a high voltage power supply apparatus, e.g., for an electric or hybrid vehicle, current is supplied from a high-voltage DC power source to a load via a power FET. A voltage detecting circuit detects the drain-source voltage VDS of the power FET when the current flows through the power FET. A first overcurrent protection signal generating circuit outputs a first overcurrent protection signal based on the detected drain-source voltage VDS of the power FET. A second overcurrent protection signal generating circuit outputs a second overcurrent protection signal based on a detected rate of increase of the drain-source voltage VDS of the power FET. A control circuit protects the components of the power supply apparatus from overcurrents by turning off the FET when the first overcurrent protection signal and/or the second overcurrent protection signal is generated and output to the control circuit.
    Type: Application
    Filed: April 30, 2013
    Publication date: May 7, 2015
    Inventor: Shunzou OHSHIMA
  • Patent number: 9024542
    Abstract: In one embodiment, an LED driving circuit can include: (i) a sense circuit configured to sense an inductor voltage, and to generate a sense voltage signal; (ii) a protection control circuit configured to activate a first protection control signal in response to a comparison of the sense voltage signal against a first reference voltage to indicate an LED device is in a first load state; (iii) the protection control circuit being configured to activate a second protection control signal in response to a comparison of the sense voltage signal against a second reference voltage to indicate the LED device is in a second load state; and (iv) a PWM control circuit configured to control a power switch according to the first protection control signal or the second protection control signal, based on the load state of the LED device.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: May 5, 2015
    Assignee: Silergy Semiconductor Technology (Hangzhou) Ltd
    Inventor: Wei Chen
  • Patent number: 9024597
    Abstract: A constant-frequency current-mode-controlled boost converter circuit provides slope compensation of an inductor current, reduces reverse inductor current in light output load conditions, and reduces oscillation between a discontinuous current mode and a continuous current mode by enabling or disabling an inductor current threshold. The constant-frequency current-mode-controlled boost converter circuit is efficient and stable in light, medium, and heavy output load conditions.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: May 5, 2015
    Assignee: STMicroelectronics (Shenzhen) R&D Co. Ltd
    Inventors: Hai Bo Zhang, Jin Li, Yong Jun Wu
  • Patent number: 9024611
    Abstract: A controller with a multi-function pin, adapted to control a converting circuit according to a control signal for converting an input voltage into an output voltage, is disclosed. The controller has the multi-function pin, an enable unit, an over-current detecting unit and a logic control unit. The enable unit is coupled to the multi-function pin for receiving an enable signal and activates the controller in response to the enable signal. The over-current detecting is coupled to the multi-function pin and determines an over-current value according to an over-current set resistance coupled between the multi-function pin and a voltage source. The over-current detecting unit generates an over-current protection signal according to the over-current value and a current flowing through the converting circuit. The logic control unit determines whether executing an over-current protection according to the over-current protection signal.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: May 5, 2015
    Assignee: Green Solution Technology Co., Ltd.
    Inventors: Li-Min Lee, Quan Gan, Shian-Sung Shiu, Chung-Che Yu
  • Patent number: 9024610
    Abstract: A modulator with balanced slope compensation including a control network, a slope compensation network, an offset network and an adjust network. The control network receives a feedback signal indicative of an output voltage and provides a loop control signal. The slope compensation network develops a slope compensation signal. The offset network determines a DC offset of the slope compensation signal. The adjust network combines the DC offset, the slope compensation signal and the loop control signal to provide a balanced slope compensated control signal. The DC offset may be determined as a peak of the slope compensation signal. The slope compensation signal may be developed based on the output voltage and a pulse control signal, in which the pulse control signal is developed using the balanced slope compensated control signal.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: May 5, 2015
    Assignee: Intersil Americas LLC
    Inventors: Rhys S. A. Philbrick, Steven P. Laur, M. Jason Houston
  • Patent number: 9024593
    Abstract: A power supply unit includes a boost converter having an input node and output node. The output node is coupled to a high-side of an H-bridge that is for supplying power to a capacitive load that is coupled to a first node and to a second node of the H-bridge. A first diode is coupled in forward direction between the first node of the H-bridge and the input node of the boost converter. A second diode is coupled in forward direction between the second node of the H-bridge and the input node of the boost converter.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: May 5, 2015
    Assignee: Texas Instruments Deutschland GmbH
    Inventors: Thomas Keller, Joerg E. Goller, Erich J. Bayer
  • Publication number: 20150115915
    Abstract: A power switching voltage regulator includes a high-side switch, a low-side switch, an inductor, a detection circuit, and a gate voltage adjusting unit. The high-side switch is coupled to a voltage source; the low-side switch is coupled between the high-side switch and a ground. A connection node is located between the high-side switch and the low-side switch. The inductor is coupled between the connection node and a power output terminal of the power switching voltage regulator. The detection circuit detects an output voltage of the power output terminal, when the output voltage swings out of a predetermined range. The gate voltage adjusting unit dynamically adjusts a gate voltage on-resistances of the high-side switch and the low-side switch.
    Type: Application
    Filed: October 30, 2014
    Publication date: April 30, 2015
    Inventor: SHANG-CHENG YU
  • Publication number: 20150115911
    Abstract: In one implementation, a voltage converter includes a high side power switch, and first and second low side power switches. The voltage converter also includes a driver stage for driving the high side power switch and the first and second low side power switches, and an adaptive OFF-time control circuit coupled to the driver stage. The adaptive OFF-time control circuit is configured to sense a current through one of the first and second low side switches, and to determine an adaptive off time for the high side power switch based on the sensed current.
    Type: Application
    Filed: September 9, 2014
    Publication date: April 30, 2015
    Inventors: Parviz Parto, Amir M. Rahimi
  • Publication number: 20150115913
    Abstract: A bidirectional AC series voltage regulator that regulates an output AC voltage level regardless of the varying AC input voltage utilizing high frequency series inductors that only process a proportion of the total output power. The AC series voltage regulator detects the power inductor current direction data signal and can generate power inductor current direction data signals for its control to determine the AC input voltage polarity at all time; wherein the determination of the AC input voltage polarity is unambiguous during the AC input voltage zero crossover and near zero points; and wherein the determination of the AC input voltage polarity allows normal switching sequence of the AC bidirectional switches during the AC input voltage zero crossover and near zero points to prevent power “shoot-through.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 30, 2015
    Inventors: Neal George STEWART, Wing Ling CHENG
  • Publication number: 20150115914
    Abstract: A control circuit and a control method for a switching converter. The control circuit has a clock circuit and a comparing circuit. The clock circuit is configured to generate a clock signal to make at least one switch to operate in a first state once a rising edge of the clock signal arrives. The comparing circuit is configured to compare a feedback signal with a reference signal to generate a comparing signal, and wherein the comparing signal is configured to make the at least one switch to start to operate in a second state when the feedback signal is larger than the reference signal. The control circuit makes a switching converter to operate in a high dynamic speed with a constant switching frequency.
    Type: Application
    Filed: October 29, 2014
    Publication date: April 30, 2015
    Inventor: Junchang Chang
  • Publication number: 20150115912
    Abstract: Provided is a reference voltage generator having flat temperature characteristics. The reference voltage generator includes a resistor (3) surrounding a periphery of a depletion MOS transistor (1) of a first conductivity type which is connected so as to function as a current source for causing a constant current to flow, and an enhancement MOS transistor (2) of the first conductivity type diode-connected thereto, and also includes a current source capable of being trimmed with high precision under a preset temperature environment and a diode connected in series to the current source. The reference voltage generator can operate under a given preset temperature environment because a voltage consumed in the resistor becomes approximately constant in accordance with a signal output from the diode.
    Type: Application
    Filed: October 23, 2014
    Publication date: April 30, 2015
    Inventors: Masayuki HASHITANI, Yoshitsugu HIROSE
  • Publication number: 20150115910
    Abstract: A system, power supplies, controller and method for enhanced phase current sharing are disclosed. For example, a power supply for enhanced phase current sharing is disclosed, which includes a plurality of power modules, a communication bus coupled to an input of each power module of the plurality power modules, and an output voltage node coupled to a first side of an inductor of each power module of the plurality of power modules, wherein each power module of the plurality of power modules includes a digital controller coupled to the input of the power module, and an RC circuit enabled to generate a feedback signal, coupled to a second side of the inductor and the output voltage node. In some implementations, the power supply is at least part of a power management integrated circuit (PMIC) or at least part of a power supply formed on a semiconductor IC, wafer, chip or die.
    Type: Application
    Filed: August 22, 2014
    Publication date: April 30, 2015
    Inventors: Shuai Jiang, Jian Yin, Zhixiang Liang
  • Patent number: 9018927
    Abstract: A portable electronic apparatus and a power management method are provided. The portable electronic apparatus includes a power manager and a controller. The power manager is used to receive a supply power generated by a power adapter. The power manager determines whether to generate a detecting signal by detecting whether a voltage value variation of the supply power is greater than a preset range. The power manager generates a current detecting value according to an input current provided by the supply power. The controller receives the detecting signal and the current detecting value, and generates an input current limit value according to a receiving status of the detecting signal and the current detecting value. The power manager controls the input current according to the input current limit value.
    Type: Grant
    Filed: July 4, 2013
    Date of Patent: April 28, 2015
    Assignee: Wistron Corporation
    Inventors: Wei-Chih Lin, Chih-Chuan Kung
  • Publication number: 20150108954
    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: Application
    Filed: April 23, 2014
    Publication date: April 23, 2015
    Applicant: MAGNACHIP SEMICONDUCTOR, LTD.
    Inventors: Tim YU, Greg Wardle
  • Publication number: 20150108957
    Abstract: A voltage generation circuit supplies an internal power supply voltage to an internal circuit via an output terminal and includes a regulator, a second drive element, and a control circuit The regulator includes a first drive element disposed between an external power supply VDD (first power supply) and an output terminal, and supplies a voltage based on a reference voltage to the output voltage by controlling the first drive element. The second drive element is disposed between the external power supply VDD and the output terminal, and supplies a voltage of the external power supply VDD to the output terminal when activated. When a voltage of the external power supply is a previously set detection voltage value or less, the control circuit activates the first and the second drive element, and when the voltage of the external power supply exceeds the detection voltage value, deactivates the second drive element.
    Type: Application
    Filed: December 22, 2014
    Publication date: April 23, 2015
    Inventor: Shingo Nakashima
  • Publication number: 20150108956
    Abstract: A peak efficiency detection system may include a switched power supply (SPS) module providing an output supply signal. The SPS module may have an internal node, and a plurality of SPS circuits configured to generate the output supply signal on the internal node. A dead type module may generate control signals. A central node external to the SPS module may deliver the output supply signal to a load module. A power stage size control module may generate control signals for controlling the SPS module. A peak-efficiency detection (PED) module may receive the output supply signal from the central node, the control signals from the SPS module, and the control signals from the power stage size control module. The PED module may generate a signal representative of an efficiency of the SPS module.
    Type: Application
    Filed: October 20, 2014
    Publication date: April 23, 2015
    Applicant: STMicroelectronics International N.V.
    Inventor: Vratislav Michal
  • Publication number: 20150108955
    Abstract: A charge transfer circuit for capacitive sensing is disclosed. The charge transfer circuit for capacitive sensing includes a variable capacitor, an X-drive unit, and an active output voltage feedback (AVF) part. The variable capacitor is disposed between the output terminal of an X-drive line and the input terminal of a Y-drive line. The X-drive unit is connected between the input unit of the X-drive line and a voltage input terminal. The active output voltage feedback (AVF) part is connected between the output terminal of the Y-drive line and a voltage output terminal. The output terminal of the AVF part is connected to the output terminal of the Y-drive line.
    Type: Application
    Filed: July 31, 2014
    Publication date: April 23, 2015
    Applicant: Hanshin University Industry-Acadamic Cooperation Foundation
    Inventor: Hyeop Goo Yeo
  • Patent number: 9013158
    Abstract: A switched mode power supply provides a reduction of switching losses and increased efficiency. The switched mode power supply includes a first switch coupled to an input terminal configured to receive an input voltage, a second switch, an inductor and an output capacitor. The first switch and the second switch are coupled together at a node, the inductor is coupled between the node and an output terminal, and the output capacitor is coupled to the output terminal. The switched mode power supply further includes a transformer coupled between a control input of the first switch and the node and a pulse generator connected to a control input of the second switch. Further, the transformer includes at most two windings, in particular a primary winding and a secondary winding which are not directly connected to each other.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: April 21, 2015
    Assignee: Intel Mobile Communications GmbH
    Inventors: Svetozar Broussev, Jani Jaervenhaara, Nikolay Tchamov
  • Publication number: 20150102788
    Abstract: A system and method are provided for controlling a switching voltage regulator circuit. An energy difference between a stored energy of a switching voltage regulator and a target energy is determined. A control variable of the switching voltage regulator is computed based on the energy difference and the control variable is applied to a current control mechanism of the switching voltage regulator. In one embodiment, the control variable is pulse width of a control signal.
    Type: Application
    Filed: October 16, 2013
    Publication date: April 16, 2015
    Applicant: NVIDIA Corporation
    Inventor: William J. Dally
  • Publication number: 20150102789
    Abstract: Provided is a voltage regulator capable of keeping the accuracy of an output voltage thereof even at high temperature. The voltage regulator includes: a reference voltage circuit configured to output a reference voltage; an output transistor configured to output an output voltage; a voltage divider circuit configured to divide the output voltage to output a divided voltage; an error amplifier circuit configured to amplify a difference between the reference voltage and the divided voltage, and output the amplified difference to control a gate of the output transistor; a switching circuit configured to switch the divided voltage of the voltage divider circuit; and a temperature detection circuit configured to output a signal in accordance with temperature to control the switching circuit.
    Type: Application
    Filed: October 13, 2014
    Publication date: April 16, 2015
    Inventors: Yuji KOBAYASHI, Manabu FUJIMURA
  • Publication number: 20150102790
    Abstract: A method identifies a short-line fault or line interruption in a circuit configuration having a series circuit of inductive load and controllable switching element. The series circuit is connected between high and low potentials of a supply voltage source. A connecting point between load and switching element is connected through at least one zener element to the high or low potential of the voltage source or the control connection of the switching element so that upon interruption of current flow through the load due to switching off the switching element, magnetic energy stored in the load can be reduced by a zener element becoming conductive. After switching off the switching element, the voltage at the connecting point is ascertained and a voltage pulse duration is compared with a first prescribed duration. If the duration is shorter than the first prescribed duration, a line interruption or a short is inferred.
    Type: Application
    Filed: October 14, 2014
    Publication date: April 16, 2015
    Inventors: GUNTHER WOLFARTH, HARALD SCHMAUSS
  • Patent number: 9007042
    Abstract: In a DC/DC converter, a first operation section calculates a first operation value, based on a difference voltage between an instruction value for a high-voltage-side voltage and a detected value of a high-voltage-side voltage, a second operation section calculates a second operation value, based on a difference voltage between a voltage instruction value for a charge-discharge capacitor and a voltage detected value of the charge-discharge capacitor, and a switching control section obtains a conduction ratio, based on the first operation value and the second operation value, and controls, based on the conduction ratio, switching operations of first to fourth semiconductor circuits, thereby controlling the high-voltage-side voltage, and the voltage of the charge-discharge capacitor.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: April 14, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tatsuya Okuda, Takahiro Urakabe, Masaru Kobayashi, Matahiko Ikeda, Hirotoshi Maekawa
  • Patent number: 9007039
    Abstract: Provided is a single inductor multiple output (SIMO) direct current-to-direct current (DC/DC) converter that may perform DC/DC conversion by transferring, to output nodes, input current that is input and thereby stored in a single inductor. An output selection unit of the SIMO DC/DC converter may select, from output nodes, a first output node to be supplied with current from a driving unit, and provide output voltage of the first output node and reference voltage of the first output node to a hysteresis comparison unit. The hysteresis comparison unit may control on-time and/or inductor peak current by determining whether the output voltage of the first output node is higher than the reference voltage of the first output node by at least a first threshold, and whether the output voltage of the first output voltage is lower than the reference voltage of the first output voltage by at least a second threshold.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: April 14, 2015
    Assignee: Korea University Research and Business Foundation
    Inventors: Chul Woo Kim, Jung Moon Kim
  • Patent number: 9007038
    Abstract: A direct-current stabilized power supply device for stepping down an input voltage from a solar cell, including: a first constant voltage power supply circuit connected to the solar cell and including a constant current limiter circuit; a switch circuit; a switching-type second constant voltage power supply circuit connected to the switch circuit; and a voltage detection circuit that detects the output voltage of the first constant voltage power supply circuit. When the detected output of the first power supply circuit is equal to or higher than a first determination voltage, the switch circuit is closed, and power is supplied to the load from the second power supply circuit, and when the detected voltage is equal to or lower than a second, lower, determination voltage the switch circuit is opened, and the power supplied from the second power supply circuit is stopped.
    Type: Grant
    Filed: June 14, 2010
    Date of Patent: April 14, 2015
    Assignee: Onamba Co., Ltd.
    Inventors: Osamu Shizuya, Yukitaka Miyata, Yasufumi Konishi
  • Patent number: 9007041
    Abstract: A controller for protectively reducing an output of a converting circuit includes a feedback circuit, a logic control circuit, an over-state judgment circuit, and a protection control circuit, is disclosed. The feedback circuit generates a modulation signal according to an output of a converting circuit. The logic control circuit is coupled to the feedback circuit and controls the converting circuit according to the modulation signal for stabilizing the output of the converting circuit. The over-state judgment circuit receives an over-state reference signal and a detecting signal, and generates a protection signal in response to levels of the detecting signal and the over-state reference signal. The protection control circuit is coupled to the logic control circuit and the over-state judgment circuit and controls the logic control circuit to lower the output of the converting circuit when receiving the protection signal.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: April 14, 2015
    Assignee: Green Solution Technology Co., Ltd.
    Inventors: Li-Min Lee, Chung-Che Yu, Shian-Sung Shiu, Quan Gan
  • Patent number: 9007040
    Abstract: Disclosed is a DC-DC power conversion apparatus (10) including two or more switching units (SU1, SU2) each of which further includes two semiconductor switching elements (Sa, Sb), and wherein each of the semiconductor switching elements (S1a, S1b, S2a, S2b) of each of the switching units are all connected in series, and which also includes an energy transition capacitor (C1) for conducting charging/discharging, and an inductor (L). The DC-DC power conversion apparatus (10) is also provided with a control unit that makes the semiconductor elements execute operations in four types of switching modes, according to the ratio (V2/V0) of the input/output voltages of the power conversion apparatus and the direction of the power transmission, and that also makes the elements carry out a current-discontinuing operation wherein the inductor current will become zero during switching operation, upon low load.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: April 14, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Matahiko Ikeda, Masaru Kobayashi, Hirotoshi Maekawa, Naoki Moritake, Takao Mitsui
  • Patent number: 9008251
    Abstract: The present invention discloses an adaptive phase-shifted synchronization clock generation circuit and a method for generating phase-shifted synchronization clock. The adaptive phase-shifted synchronization clock generation circuit includes: a current source generating a current which flows through a node to generate a node voltage on the node; a reverse-proportional voltage generator coupled to the node for generating a voltage which is reverse-proportional to the node voltage; a ramp generator receiving a synchronization input signal and generating a ramp signal; a comparator comparing the reverse-proportional voltage to the ramp signal; and a pulse generator for generating a clock signal according to an output from the comparator.
    Type: Grant
    Filed: November 2, 2013
    Date of Patent: April 14, 2015
    Assignee: Richtek Technology Corporation
    Inventors: Isaac Chen, An-Tung Chen
  • Publication number: 20150097536
    Abstract: An electromechanical energy conversion system includes a variable capacitor, an electronic charging/discharging unit and a power source/sink; the power source/sink being coupled to the electronic charging/discharging unit which is coupled to the variable capacitor; the variable capacitor including first and second electrodes that are separated by an intermediate medium providing a gap distance therebetween; the gap distance being adjustable between a minimal distance and a maximal distance as a function of an externally applied mechanical force; the electronic charging/discharging unit being arranged for charging the variable capacitor from the power source/sink at substantially a state of the variable capacitor when the gap distance is minimal and the area of the elastically deformed body maximal, and for discharging the variable capacitor to the power source/sink at substantially a state of the variable capacitor when the gap distance is maximal and the area of the elastically deformed body minimal.
    Type: Application
    Filed: May 8, 2013
    Publication date: April 9, 2015
    Applicant: SINGLE BUOY MOORINGS INC.
    Inventor: Rick Van Kessel
  • Publication number: 20150097492
    Abstract: Disclosed are various embodiments for a power stage that can drive various types of loads. The power stage includes a first capacitor and a second capacitor that are coupled to the load. The power stage also includes switches that are operable in a first power stage state and a second power stage state. When the switches are in the first power stage state, the first capacitor discharges to the load, and the second capacitor charges. When the switches are in the second power stage state, the second capacitor discharges to the load, and the first capacitor charges.
    Type: Application
    Filed: June 28, 2013
    Publication date: April 9, 2015
    Inventors: Dongsheng Brian Ma, Yikai Wang, Rajdeep Bondade
  • Publication number: 20150097535
    Abstract: In a switched mode inductive DCDC converter having a first mode that conducts a first current path through an inductor and through a first switch, and a second mode that conducts a second current path through the inductor and through a second switch, a detecting component detects a parameter. The detecting component outputs a biasing signal extend the turn OFF time of one of the switches in order to decrease a voltage build up on the other switch.
    Type: Application
    Filed: June 4, 2014
    Publication date: April 9, 2015
    Inventors: Hans Schmeller, Erich Bayer
  • Publication number: 20150097537
    Abstract: A fast transient switching voltage regulator includes a reference signal generator to provide a reference in a feedback path to control switching. The reference signal generator is operative to incorporate a voltage offset into the reference signal timed with the control pulses used to control the switching. The voltage offset moves the reference signal out of the way of pulses introduced in the feedback path due to capacitance ESL in the output capacitor of the switching voltage regulator.
    Type: Application
    Filed: October 2, 2014
    Publication date: April 9, 2015
    Inventors: Marko Harry Koski, Visu Vaithiyanathan Swaminathan
  • Publication number: 20150097538
    Abstract: The present disclosure includes a feedback system that can control hybrid regulator topologies that have multiple converters or regulators connected in series. The hybrid regulator can include at least two regulators: a switched inductor regulator and a switched-capacitor regulator. The disclosed embodiments of the feedback system can simplify feedback design for the hybrid regulator that can include multiple converter stages. These disclosed embodiments can control the feedback to improve the efficiency of a hybrid regulator.
    Type: Application
    Filed: October 7, 2014
    Publication date: April 9, 2015
    Inventors: Hanh-Phuc LE, John CROSSLEY, Alberto PUGGELLI, Wonyoung KIM
  • Publication number: 20150097539
    Abstract: A switching converter having a high-side switching transistor and a low-side switching transistor and an inductor, having a circuit for generating a simulated waveform representing a sawtooth inductor current waveform. A circuit for monitoring and voltage at a switch node between the high-side and low-side transistors to determine a time during which the inductor current is increasing and a time during which the inductor current is decreasing wherein voltage across the low-side transistor when it is conducting represents a first portion of the simulated sawtooth inductor current waveform. A circuit for utilizing the time when the inductor current is increasing, the time when the inductor current is decreasing and the voltage across the low-side transistor when it is conducting to generate a portion of the simulated inductor current waveform when the high-side transistor is conducting. A method and a power supply utilizing this circuit are also disclosed.
    Type: Application
    Filed: October 20, 2014
    Publication date: April 9, 2015
    Inventors: Scott E. Ragona, Rengang Chen, David Jauregui
  • Patent number: 9000745
    Abstract: A switching regulator includes a high side driver electrically coupled with a power line that is configured to provide a supply voltage. A low side driver is electrically coupled between the high side driver and ground. A regulator control circuit is electrically coupled with a gate of the high side driver and a gate of the low side driver. The regulator control circuit is configured to pre-charge a first node between the regulator control circuit and the gate of the high side driver to a first voltage level and to boost the first node to a second voltage level that is higher than the first voltage level to turn on the high side driver.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: April 7, 2015
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventor: Justin Shi
  • Publication number: 20150091538
    Abstract: An output voltage is compared to a reference voltage, comparison signals are generated, and control signals and mode signals are generated in response thereto. The output voltage is generated in response to the control signals. A speed of the comparing is increased in response to the mode signals indicating that the output voltage is being increased. The speed is reduced in response to the mode signals indicating that the output voltage is being reduced. For increasing the speed, a path is enabled to conduct current. While the path is enabled, at least one switched voltage is connected to vary an amount of the current conducted through the path. The switched voltage is at least one of the reference voltage and the output voltage. For reducing the speed, the path is disabled against conducting current. While the path is disabled, the switched voltage is disconnected from varying the amount.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 2, 2015
    Applicant: Texas Instruments Incorporated
    Inventors: Wei Fu, Karan Singh Bhatia, Siang Tong Tan
  • Publication number: 20150091539
    Abstract: A power circuit is described that includes a half-bridge and a driver for controlling a first switch of the half-bridge. The driver is configured to cause the first switch to transition between operating in an on-state of the first switch and an off-state of the first switch based at least in part on a driver signal and a voltage at the half-bridge.
    Type: Application
    Filed: October 2, 2013
    Publication date: April 2, 2015
    Applicant: Infineon Technologies Autria AG
    Inventor: Karl Norling
  • Publication number: 20150091525
    Abstract: A kilowatt-scale high-frequency electrical power conversion system adapted for variable output power delivery is described, in which switching frequency of switchable power delivery circuitry is dynamically modulated in transition of the system to a low power regime that is substantially below maximum power output, in order to at least partially attenuate thermal overload from heat generation of switching components in such transitions. The system is useful in high-efficiency charging of rechargeable batteries of electrical vehicles, e.g., e.g., automotive, industrial, and other motive power vehicles.
    Type: Application
    Filed: September 24, 2014
    Publication date: April 2, 2015
    Applicant: AKER WADE POWER TECHNOLOGIES, LLC
    Inventors: John Frederick Aker, Andrey M. Peskov, Jonathan A. Brown
  • Patent number: 8994468
    Abstract: A modulation method is provided. The modulation method includes the steps of receiving multiple sinusoidal signals, obtaining the maximum value of the sinusoidal signals, obtaining the median value of the sinusoidal signals, and obtaining the minimum value of the sinusoidal signals within a period to generate a difference between the maximum value and the minimum value, generating a difference according to an upper limit and a lower limit of a predetermined comparison value, and comparing the two differences to generate an optimized modulation signal.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: March 31, 2015
    Assignee: Industrial Technology Research Institute
    Inventors: Shih-Hsiang Chien, Yong-Kai Lin, Chin-Hone Lin
  • Patent number: 8994347
    Abstract: Embodiments for at methods, apparatus and systems for operating a voltage regulator are disclosed. One method includes generating, by a switching controller, a switching voltage through controlled closing and opening of a series switch element and a shunt switch element, and generating an output voltage by filtering the switching voltage with an output inductor and a load capacitor. The method further includes generating an assisting current based on a value of current conducted through the output inductor, and assisting the load current by summing the assisting current with the current conducted through the inductor.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: March 31, 2015
    Assignee: R2 Semiconductor, Inc.
    Inventors: Pablo Moreno Galbis, James E. C. Brown
  • Patent number: 8994350
    Abstract: A switching regulator comprises a PWM controller that controls switching of a power converter via a PWM control signal. The switching regulator detects load transients in the load driven by the power converter. Responsive to the detection of a load transient, the switching regulator resets a PWM clock synchronously with a fast clock operating at a higher frequency than the PWM clock. By doing so, the switching regulator beneficially responds more quickly to changes in the load than with conventional architectures that utilize only the slower PWM clock. This provides improved transient response without sacrificing power efficiency.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: March 31, 2015
    Assignee: Dialog Semiconductor Inc.
    Inventor: Yang Li
  • Patent number: 8994345
    Abstract: There is described a buck-boost converter comprising: a voltage source; an inductor, wherein a first terminal of the inductor is switchably connected to the voltage source; and a plurality of capacitors switchably connected to a second terminal of the inductor, wherein a respective plurality of output voltages are formed across the plurality of capacitors, further comprising: an error determination means, for determining an error in each of the plurality of voltages, an inner control loop adapted to switchably connect one of the plurality of capacitors to the second terminal of the inductor in dependence on the determined errors; and an outer control loop adapted to control switching between buck mode and boost mode in dependence upon the determined errors.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: March 31, 2015
    Assignee: Nujira Limited
    Inventor: Martin Paul Wilson