Switched (e.g., On-off Control) Patents (Class 323/271)
  • Patent number: 10158329
    Abstract: An envelope tracking (ET) power amplifier circuit is disclosed. The ET power amplifier circuit includes ET tracker circuitry configured to output an ET modulated output voltage having an output voltage envelope that tracks a target voltage envelope of an ET modulated target voltage. Impedance adjustment circuitry in the ET power amplifier circuit is provided between a first node and a second node coupled to a feedback voltage input and a voltage output of the ET tracker circuitry, respectively. A power amplifier circuit(s) includes a first amplifier and a second amplifier coupled respectively to the first node and the second node. As such, it is possible to configure the impedance adjustment circuitry to provide adjustment impedance to offset output impedance of the ET tracker circuitry, thus helping to reduce voltage error in the ET power amplifier circuit.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: December 18, 2018
    Assignee: Qorvo US, Inc.
    Inventor: Nadim Khlat
  • Patent number: 10158290
    Abstract: A state machine for a multi-phase voltage converter controls cycle-by-cycle switching of the phases by: entering a first state in which a control signal for the high-side switch is activate and control signals for the low-side and SR (synchronous rectification) switches are deactivate; entering a second state in which the control signals for all switches are deactivate; entering a third state in which the control signal for the high-side switch is deactivate and the control signals for the low-side and SR switches are activate; entering a fourth state in which the control signals for the high-side and low-side switches are deactivate and the control signal for the SR switch is activate and then entering a fifth state in which the control signals for all switches are deactivate, or entering the fifth state without entering the fourth state; and entering the first state at the beginning of the next switching cycle.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: December 18, 2018
    Assignee: Infineon Technologies Austria AG
    Inventors: Amir Babazadeh, Benjamim Tang
  • Patent number: 10153639
    Abstract: One example discloses an apparatus for power management, including: a current sink/source sensor configured to monitor a power-supply to inter-power-domain sink/source-current and to generate a current mismatch signal if the power-supply to inter-power-domain sink/source-current exceeds a threshold range; and a current imbalance controller coupled to receive the current mismatch signal and configured to generate a set of power-domain control signals; wherein the set of power-domain control signals reduce an absolute value of the power-supply to inter-power-domain sink/source-current.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: December 11, 2018
    Assignee: NXP B.V.
    Inventor: Ajay Kapoor
  • Patent number: 10148182
    Abstract: The present disclosure discloses a voltage conversion circuit, including: a first power transistor; a second power transistor, where the second power transistor is cut off when the first power transistor is conductive and is conductive when the first power transistor is cut off; a first energy storage element; a second energy storage element, a bleed module, configured to be coupled to the first power transistor, where when the first power transistor is cut off and a voltage of a source of the first power transistor reaches a source threshold, provide a current path for a current flowing from the source of the first power transistor to the ground. By means of the foregoing, a voltage difference between a drain and the source of the first power transistor can be decreased, thereby reducing a risk of burning out the first power transistor, and avoiding an increase in manufacturing costs.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: December 4, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jiake Wang, Liang Chen
  • Patent number: 10141850
    Abstract: A comparator circuit includes a first comparator arranged to compare an input signal with a reference voltage so as to generate a first comparison signal, a second comparator arranged to compare the input signal with a variable reference voltage so as to generate a second comparison signal, a variable reference voltage generator arranged to generate the variable reference voltage, and a logic unit arranged to output one of the first comparison signal and the second comparison signal as a comparison signal. The logic unit outputs the first comparison signal as the comparison signal while controlling the variable reference voltage generator to sweep the variable reference voltage until the first comparison signal and the second comparison signal exhibit desired response behaviors, and moves to a state capable of outputting the second comparison signal as the comparison signal after the sweep of the variable reference voltage is completed.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: November 27, 2018
    Assignee: Rohm Co., Ltd.
    Inventors: Genki Tsuruyama, Tetsuo Tateishi
  • Patent number: 10141411
    Abstract: A semiconductor device includes a semiconductor substrate of silicon carbide, and a temperature sensor portion. The semiconductor substrate includes a portion in which an n-type drift region and a p-type body region are laminated. The temperature sensor portion is disposed in the semiconductor substrate and is separated from the drift region by the body region. The temperature sensor portion includes an n-type cathode region being in contact with the body region, and a p-type anode region separated from the body region by the cathode region.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: November 27, 2018
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Atsushi Onogi, Toru Onishi, Shuhei Mitani, Yusuke Yamashita, Katsuhiro Kutsuki
  • Patent number: 10128753
    Abstract: The present application relates to controllers using current mode control to control the operation of switching power supplies such as DC-DC converters. The application provides an inductor current.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: November 13, 2018
    Assignee: Rohm Powervation Limited
    Inventors: Mark Hartman, Botao Miao
  • Patent number: 10121641
    Abstract: A voltage sensor of a substrate processing system including a multi-divider circuit, a clamping circuit and first and second outputs. The multi-divider circuit receives a RF signal indicative of a RF voltage at a substrate. The multi-divider circuit includes dividers of respective channels and outputting first and second reduced voltages based on the received RF signal. The reduced voltages are less than the RF voltage. The clamping circuit clamps the first reduced voltage to a first predetermined voltage when the RF voltage is greater than a second predetermined voltage or the first reduced voltage is greater than a third predetermined voltage. While the received RF signal is in first and second voltage ranges, the first and second outputs output output signals based respectively on the first and second reduced voltages. The first predetermined voltage is based on a maximum value of the first voltage range.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: November 6, 2018
    Assignee: LAM RESEARCH CORPORATION
    Inventors: Maolin Long, John Drewery, Alex Paterson
  • Patent number: 10122296
    Abstract: A diagnostic system for a power converter which includes a semiconductor device, and which performs a switching operation between conduction and interruption of the principal current flowing through a main circuit. The diagnostic system includes a current change amount calculation circuit for obtaining numeric data which reflects a current change amount of the principal current per unit time, a determination circuit for determining a state of the power converter by comparing the numeric data with a reference value, and an output circuit for outputting a determination result of the determination circuit.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: November 6, 2018
    Assignee: HITACHI, LTD.
    Inventors: Junichi Sakano, Kimihisa Furukawa, Takashi Ogawa, Hisashi Endou
  • Patent number: 10110126
    Abstract: A circuit and method providing switching regulation configured to provide a pulse frequency modulation (PFM) mode of operation with reduced electromagnetic interference (EMI) comprising an output stage configured to provide switching comprising a first and second transistor, a sense circuit configured to provide output current information sensing from an output stage and a current limit reference, a first digital-to-analog converter (DAC) configured to provide signal to the current limit reference, an adder function configured to provide a signal to the first digital-to-analog converter (DAC), and a linear shift feedback register (LSFR) configured to provide a signal to an adder function followed by the first digital-to-analog converter (DAC), and the LSFR receives a clock signal from said output stage.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: October 23, 2018
    Assignee: Dailog Semiconductor (UK) Limited
    Inventors: Mark Childs, Tiago Patrao, Pietro Gallina, Alexandre Tavares, Michele De Fazio
  • Patent number: 10110128
    Abstract: Methods and apparatus for a DC-DC converter having input voltage feedforward for reducing the effects of input voltage signal transients. In embodiments, a feedback circuit receives an output voltage and generates a feedback signal and a modulation circuit receives the feedback signal and generates a control signal for a switching element configured to generate the output voltage, which is boosted from an input voltage. A feedforward module combines the input voltage and current information for an inductive energy storage element, which forms a boost circuit for generating the output voltage, and provides a feedforward signal to the modulation circuit. The modulation circuit can generate the control signal from a ramp signal and the feedforward signal.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: October 23, 2018
    Assignee: Allegro MicroSystems, LLC
    Inventors: Pranav Raval, Vijay Mangtani
  • Patent number: 10097094
    Abstract: A power converter determines a feedback signal according to a voltage signal related to an output voltage of the power converter and a reference voltage, thereby regulating the output voltage. A control circuit and method for programming the output voltage of the power converter utilize an offset current generator to inject a current or sink a current for changing the voltage signal or the reference signal, thereby adjusting the output voltage. As a result, it gets rid of complicated circuitry but provides more steps adjustment, which reduces related costs.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: October 9, 2018
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Isaac Y. Chen
  • Patent number: 10090755
    Abstract: A method includes comparing, by a voltage-second (VS) controller, a first duty cycle used to control a first switch at a primary side of a power transformer of a DC-to-DC converter with a threshold. The method further includes if a value of the first duty cycle is less than the threshold, controlling, by the VS controller, a second duty cycle used to control a second switch at a secondary side of the power transformer, and maintaining a voltage level at an output voltage node at a non-zero value, and if the value of the first duty cycle is greater than the threshold, controlling, by an output voltage loop, the second duty cycle based on the first duty cycle, and monotonically increasing the voltage level the at the output voltage node from the non-zero value to a predetermined value.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: October 2, 2018
    Assignee: Texas Instruments Incorporated
    Inventors: Frank Tang, Kening Gao, Lin Sheng, Danyang Zhu
  • Patent number: 10090765
    Abstract: In one example, a circuit for controlling a multi-phase converter is configured to determine an operating condition at a multi-phase converter module. Each phase switching module of a plurality of phase switching modules is configured to electrically couple, based on a respective switching signal, a voltage source to a respective phase of the multi-phase converter module. The circuit is further configured to, for each switching signal, generate an operating value using the operating condition and determine a dynamic hysteresis value for a next switching period using a duration of a previous switching period and a phase shift. The circuit is further configured to, for each switching signal, compare the operating value to a reference value with a hysteretic comparator function using the dynamic hysteresis value and generate the respective switching signal based on the comparison of the operating value to the reference value.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: October 2, 2018
    Assignee: Infineon Technologies AG
    Inventors: Marc Kanzian, Matteo Agostinelli
  • Patent number: 10084369
    Abstract: Methods and systems for implementing a closed loop DC-DC converter utilize a compensator to stabilize the output voltage of the DC-DC converter while improving the loop gain in the band of interest. A compensator may be implemented by an operational amplifier and a feedback circuit. The operational amplifier may be configured to receive a fraction of sensed output voltage at the non-inverting terminal and compare the sensed output voltage with the voltage received at the inverting terminal to generate an error signal which is used to determine the duty cycle of a pulse-width modulated signal.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: September 25, 2018
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Dan Shen, Lorenzo Crespi
  • Patent number: 10075085
    Abstract: Techniques are provided to tune a gate-drive control signal for a switching device. In an aspect, a device is provided that includes a dead-time generator circuit, a first dead-time tuner circuit and a second dead-time tuner circuit. The dead-time generator circuit generates a control signal for a first switching device that is coupled to a second switching device via a switching node. The first dead-time tuner circuit generates, based on the control signal and a switching signal indicative of a voltage associated with the switching node, a first modified control signal for the first switching device. The second dead-time tuner circuit generates, based on a modified version of the switching signal and a tuning process that repeatedly modifies the control signal until a first dead-time value satisfies a defined criterion, a second modified control signal for the first switching device.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: September 11, 2018
    Assignee: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Ziang Chen, Tak Sang Yim, Yat To Wong, Wing Hung Ki
  • Patent number: 10075075
    Abstract: A buck-boost power converter and a mode transition control module. The mode transition control module includes a buck duty cycle sensing and comparison circuit and a boost duty cycle sensing and comparison circuit. The buck duty cycle sensing and comparison circuit can provide a first mode transition control signal through comparing a first signal indicative of a buck duty cycle with a first threshold signal indicative of a buck duty threshold to regulate the buck-boost power converter to transit between a buck mode and a buck-boost mode. The boost duty cycle sensing and comparison circuit can provide a second mode transition control signal through comparing a second signal indicative of a boost duty cycle with a second threshold signal indicative of a boost duty threshold to regulate the buck-boost power converter to transit between a the buck-boost mode and a boost mode.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: September 11, 2018
    Assignee: Chengdu Monolithic Power Systems, Co. Ltd.
    Inventor: Jian Zhang
  • Patent number: 10075078
    Abstract: A control circuit for a switching power converter is disclosed. The control circuit may comprise an OFF control signal generation module configured to generate an OFF control signal having an inactive logic state and an active logic state. The control circuit is configured to turn OFF a main switch of the switching power converter in response to the active logic state. The OFF control signal generation module can regulate an ON time of the main switch through regulating a change of the OFF control signal from the inactive logic state to the active logic state based on a first capacitor voltage across a first capacitor to maintain a switching frequency of the main switch substantially constant. The first capacitor is charged in a predetermined time since the main switch is turned ON and discharged after the predetermined time.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: September 11, 2018
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Yike Li
  • Patent number: 10056822
    Abstract: A control circuit for a switching regulator implementing a fixed frequency constant on-time control scheme incorporates a reference voltage generator to generate a reference voltage ramp that varies over substantially the entire switching period. In one embodiment, the reference voltage increases from an initial voltage value at the start of each switching period towards the end of the switching period and is reset to the initial voltage value at the end of each switching period. The reference voltage ramp ensures stable feedback control operation in the switching regulator without introducing voltage offset for all output voltage values. The control circuit enables the switching regulator to apply constant on-time control scheme while using an output capacitor having any ESR value, including an output capacitor with low or zero ESR.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: August 21, 2018
    Assignee: Alpha and Omega Semiconductor (Cayman) Ltd.
    Inventors: Zhiye Zhang, Zhinan Wei
  • Patent number: 10054617
    Abstract: This application discusses, among other things, zero current detection. In an example, a circuit for zero current detection can include a compensating circuit and a detecting circuit. The compensating circuit can be configured to feed back a compensating voltage to the detecting circuit according to an output voltage of a DC-DC converting circuit. The detecting circuit can be configured to dynamically adjust an intentional offset voltage according to the compensating voltage, and to perform zero current detection of the DC-DC converting circuit according to the adjusted Voffset.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: August 21, 2018
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Maoxu Li, Dong Li
  • Patent number: 10046657
    Abstract: When the heat stress cumulative value of a second boost converter is equal to or greater than a second threshold value that is less than a first threshold value and the heat stress cumulative value of a first boost converter is less than a third threshold value that is equal to or less than the second threshold value, the first boost converter is controlled by voltage control and the second boost converter is controlled by power control. When the heat stress cumulative value of the first boost converter is equal to or greater than the second threshold value and the heat stress cumulative value of the second boost converter is less than the third threshold value, the first boost converter is controlled by the power control and the second boost converter is controlled by the voltage control.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: August 14, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Yohsuke Tagawa
  • Patent number: 10044255
    Abstract: A multi-phase power supply circuit includes at least a first phase and a second phase (such as semi-resonant DC-DC power converter circuits), each of which output current to power a load. The first phase includes a first inductor device through which first current is delivered to the load. The second phase includes a second inductor device through which second current is delivered to the load. A current monitor circuit of the multi-phase power supply circuit is operable to monitor current through the second inductor device. Control circuitry of the multi-phase power supply circuit is operable to adjust timing of activating a control switch in the second phase to an ON state based on the monitored current. Timing of the phases is adjusted to achieve a common switching and zero current switching amongst the phases.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: August 7, 2018
    Assignee: Infineon Technologies Austria AG
    Inventors: Venkat Sreenivas, Amir Babazadeh
  • Patent number: 10033182
    Abstract: A bidirectional AC-to-DC and DC-to-AC circuit includes a first inductor-capacitor (LC) circuit connected to an AC power source, a transistor synchronized with the AC power source signal, a second LC circuit electrically connected to the synchronized transistor and the first inductor-capacitor circuit, a high-frequency switching transistor electrically connected to the second inductor-capacitor circuit and a direct current (DC) load, and a controller connected to the high-frequency switching transistor. The controller identifies an error between a measured DC output signal and a predetermined DC output signal that is applied to the DC load, and adjusts a duty cycle of a pulse width modulation (PWM) switching signal for the high-frequency transistor to reduce the identified error.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: July 24, 2018
    Assignee: Indiana University Research and Technology Corporation
    Inventor: Afshin Izadian
  • Patent number: 10027219
    Abstract: A switching controller circuit for a power converter includes analog and digital control circuits, a clock enable circuit, and a digital pulse width modulation (PWM) circuit. When the power converter is in a standby mode, the switching controller circuit operates in an analog control mode by activating the analog control circuit. When the power converter is not in standby mode, the switching controller circuit activates the digital control circuit and operates in a digital control mode. The switching controller circuit uses inexpensive electronic components and consumes less power in the analog control mode, thereby reducing standby mode power consumption.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: July 17, 2018
    Assignee: NXP USA, INC.
    Inventors: Wanfu Ye, Lingling Wang
  • Patent number: 10027221
    Abstract: A novel method to generate a feedback signal in a switching regulator is presented. The method includes the generation of a first feedback signal using the switching signal. The first feedback signal carries a ripple and the ripple is in phase with the switching signal. The first feedback signal does not use a control-in terminal PIN. The voltage level of the first feedback signal is regulated through a resistor and a capacitor connected between the switching node and the switching regulator controller. In an alternative method, a second feedback signal is generated using the regulator output voltage. The controller receives the second feedback through a control-in terminal PIN. In the alternative method, another resistor and another capacitor are used to connect the first feedback signal and the second feedback signal. Furthermore, the second feedback signal can adjust the regulator output voltage through two resistors connected in series.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: July 17, 2018
    Inventor: Hua Cao
  • Patent number: 10020651
    Abstract: A solid-state power controller (SSPC) includes two or more SSPC channels for connecting a load to a feed bus. The SSPC channels include a disconnect switch and an enable switch having a terminal connected to a gate of the disconnect switch. A voltage clamping diode of the SSPC channel is connected to the gate of the enable switch, and is arranged to close the enable switch when a transient voltage applied to the SSPC channel when the transient voltage exceeds the breakdown voltage of the voltage clamping diode.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: July 10, 2018
    Assignee: Hamilton Sundstrand Corporation
    Inventor: John A. Dickey
  • Patent number: 10021744
    Abstract: A power converter and a method for controlling a power converter are disclosed. The method involves generating a common mode control signal and a differential mode control signal in response to a first error signal and a second error signal, wherein the first error signal is a function of the voltage/current at a first output of a dual output resonant converter and the second error signal is a function of the voltage/current at a second output of the dual output resonant converter. The method also involves adjusting the voltage/current at the first output of the dual output resonant converter and the voltage/current at the second output of the dual output resonant converter in response to the common mode control signal and the differential mode control signal.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: July 10, 2018
    Assignee: NXP B.V.
    Inventor: Hans Halberstadt
  • Patent number: 10019022
    Abstract: A power circuit includes a first regulator and an impedance adjustment unit. The first regulator has a loop-back impedance, and provides a first power signal. The impedance adjustment unit is coupled to the first regulator, and operates to cause the first regulator to provide a second power signal having a power level different from that of the first power signal.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: July 10, 2018
    Assignee: M2Communication Inc.
    Inventors: Chia-Chi Hu, Hung-Ta Tso, Chun-Yi Lee, Derrick Wei
  • Patent number: 10014779
    Abstract: A power supply device includes a power supply module, a voltage regulator module and an over-voltage protection (OVP) module. The power supply module is utilized to provide a standby voltage signal. The voltage regulator module includes a phase modulator circuit. The phase modulator circuit includes a high-side power transistor, a low-side power transistor and a phase inductor. The OVP module is utilized to transmit the standby voltage signal to the phase modulator circuit and detect a detection potential on the phase modulator circuit. The OVP module selectively conducts the low-side power transistor of the phase modulator circuit according to the detection potential.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: July 3, 2018
    Assignee: ASUSTeK COMPUTER INC.
    Inventors: Hao-Chien Cheng, Ching-Fu Cheng, Hsiao-Wen Chen
  • Patent number: 10003252
    Abstract: A power converter circuit can be operated in a constant-current mode when a monitored output current exceeds a specified over-current threshold. A value representing an output voltage of the power converter circuit can be compared to a soft-start voltage reference value. The soft-start voltage reference value can be set (or reset) to a value representing the output voltage of the power converter when the difference between the soft-start voltage reference value and the value representing the output voltage of the power converter is greater than a specified threshold. The output voltage of the power converter can be regulated using the soft-start voltage reference value as a target voltage including ramping the soft-start voltage reference value at specified rate to maintain the soft-start voltage reference value within a specified range of a specified regulated output voltage value, such as to constrain a slew rate of the regulated output voltage.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: June 19, 2018
    Assignee: Analog Devices, Inc.
    Inventor: Michael Daly
  • Patent number: 9991794
    Abstract: An inverting buck voltage converter constructed of a switched-mode hybrid topology, with a capacitive input stage and an inductive output stage. The input stage operates as a charge pump to charge a flying capacitor connected in series with an inductor in the output stage. Clock circuitry generates first and second non-overlapping clock phases. In the second clock phase, the flying capacitor is charged to the input voltage, with a flying node between the flying capacitor and the output inductor connected at ground through a rectifier, while in the first clock phase, the flying capacitor supports the inductor current. The arrangement of the flying capacitor and inductor is such that the voltage appearing at the output terminal is inverted from the input voltage. Continuous output current is provided. Current limiting techniques protect the flying capacitor from overcurrent conditions.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: June 5, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Michael Lueders, Erich Bayer, Thomas Schaeffner, Giacomo Calabrese
  • Patent number: 9992826
    Abstract: A dual mode constant output current LED driver is capable of operating with a very wide range of input direct current (DC) voltage. This provides an effective topology for a wide range of constant output current LED drivers, and allows for changing the number of connected LEDs without negatively impacting the output current. The LED driver includes a converter and a mode selection circuit that control the modes of the circuit based on the voltage. The converter and mode selection circuit operate in a buck-boost mode when the output voltage of the LED driver is less than the DC input voltage plus a first threshold amount, and in a boost mode when the output voltage of the LED driver is greater than the DC input voltage plus a second threshold amount.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: June 5, 2018
    Assignee: OSRAM SYLVANIA Inc.
    Inventor: Alireza Safaee
  • Patent number: 9985522
    Abstract: A method and system are provided for digitally controlling a switch mode power supply without using analog-to-digital converters by providing an SMPS output in feedback to first and second comparators along with upper and lower reference voltage thresholds to detect excursion counts at dedicated counters which identify how many times an SMPS output voltage exceeds the upper and lower reference voltage thresholds during each cycle of a fixed frequency PWM signal, where the excursion counts are evaluated with a non-linear multi-step digital control loop detection sequence to generate duty cycle adjustment instructions for controlling each duty cycle of the fixed frequency PWM signal.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: May 29, 2018
    Assignee: NXP USA, Inc.
    Inventors: Stefan G. Luft, Andreas J. Roth, Hubert M. Bode
  • Patent number: 9984810
    Abstract: Provided is a reactor having a small installation area, low loss, and excellent productivity. The reactor includes a coil having a pair of winding portions and that are arranged side by side, and a magnetic core having a U-shaped core piece that is part of a powder compact. The U-shaped core piece includes a side base that has a portion opposite the ends of the pair of winding portions and uncovered by the winding portions, and disposed across the pair of winding portions, a pair of middle portions that protrude from the side base and respectively disposed inside the pair of winding portions, and an end surface facing a gap, a side extension portion extending from the side base orthogonally from the middle portions, and a central protruding portion protruding from the side base's central region, and are arranged side by side, away from the middle portions.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: May 29, 2018
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Shinichirou Yamamoto, Kazuhiro Inaba
  • Patent number: 9985549
    Abstract: A DC-DC converter includes a first switch connected between an input node and a switching node, a second switch connected between a reference node and the switching node, a capacitor having a first terminal connected to one of the input node and the reference node, a transformer including a primary coil connected between the switching node and a second terminal of the capacitor, and a secondary coil, a rectification smoothing circuit that rectifies and smooths a voltage of the secondary coil, and a drive circuit. The drive circuit alternately turns on the first and second switches, such that a dead time during which both the first and second switches are turned off has a length corresponding to a time period during which a voltage of the switching node is transitioning from a low state to a high state or the high state to the low state.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: May 29, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Toshimasa Namekawa
  • Patent number: 9973071
    Abstract: The power converter includes a first operation mode in which each of switching elements is controlled on or off independently so as to perform a power conversion between a load and both a first DC power source and a second DC power source and a second operation mode in which every two of the switching elements are controlled on or off concurrently so as to perform the power conversion between the load and the first DC power source or the second DC power source. A switching speed at which when each of the switching elements is turned on or turned off is controlled in accordance with the operation mode. Specifically, the switching speed in the second operation mode is higher than the switching speed in the first operation mode.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: May 15, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masanori Ishigaki, Shuji Tomura, Takaji Umeno, Masaki Okamura, Daigo Nobe
  • Patent number: 9960681
    Abstract: A switching power supply includes a plurality of parallel branches, each parallel branch including two serially connected controllable switches and a coil connected between the two switches and an output node, a capacitor connected between the output node of the parallel branches and ground; and a controller configured to switch the two serially connected controllable switches of each parallel branch such that a first switch of a parallel branch is switched from a conducting state to a non-conducting state when a current flowing through a coil of the parallel branch reaches a first current value larger than 5 A, and such that the second switch is switched from a conducting state to a non-conducting state when the current flowing through the coil of the parallel branch reaches a second current value smaller than 0 A.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: May 1, 2018
    Assignee: Efficient Energy GmbH
    Inventor: Holger Sedlak
  • Patent number: 9943016
    Abstract: A cooling structure for a heat-producing power magnetics device having at least two faces, includes a first cold plate having a first coolant passage and conductively coupled with at least the first face of the magnetics device and wherein at least a portion of heat generated by the power magnetics device is removed from the device by way of thermal conduction to the first coolant passage, and a coolant reservoir fluidly coupled with the first and second coolant passages.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: April 10, 2018
    Assignee: GE AVIATION SYSTEMS LLC
    Inventors: Michael Pietrantonio, Michael Carl Ludwig, Mohamed Aly Elsayed
  • Patent number: 9941791
    Abstract: The present disclosure describes apparatuses and techniques of fast transient response for switching power regulators. In some aspects, an output voltage of a switching regulator operating in a discontinuous mode is monitored via a comparator coupled directly to an output of the switching regulator. In response to the output voltage falling below a predefined threshold, a high-side switch is activated to provide current to a load connected to the output of the switching regulator. The switching regulator is then transitioned from the discontinuous mode of operation to a continuous mode of operation to control subsequent operation of the high-side switch. This can be effective to mitigate a drop in the output voltage of the switching regulator when an amount of current consumed by the load increases (e.g., a load step).
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: April 10, 2018
    Assignee: Marvell International Ltd.
    Inventors: Sofjan Goenawan, Luyang Luo, Wei Lu
  • Patent number: 9935551
    Abstract: A high-withstand-voltage normally-on transistor and a low-withstand-voltage normally-off transistor are connected in series, and diodes are provided in reverse parallel to the transistor. A gate terminal of the transistor is connected to a source terminal of the transistor, and a gate driving circuit that outputs a control signal to a gate terminal of the transistor is provided. Forward voltage of the diode is made lower than forward voltage of the diode, and an inductance component of a path connecting nodes via the diode is made greater than an inductance component of a path connecting the nodes via the diode. Accordingly, a switching circuit which includes transistors connected in series and in which transient current at a time of turning off is reduced is provided.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: April 3, 2018
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kohtaroh Kataoka, Takeshi Shiomi, Shuji Wakaiki, Hiroki Igarashi, Akihide Shibata, Hiroshi Iwata
  • Patent number: 9929661
    Abstract: In a standby signal generation circuit, a first comparator compares a FB voltage fed back from a secondary side with a first reference voltage, and a second comparator compares a signal indicative of the magnitude of a load with a second reference voltage. When the FB voltage falls under the first reference voltage, the first comparator sets an RS flip-flop via a first delay circuit. At this time, if the signal is lower than the second reference voltage and a reset signal is not inputted to the RS flip-flop, it is determined, based on a standby control signal from the load, that an output voltage of a switching power supply apparatus has fallen. Accordingly, a standby signal indicative of standby mode is outputted via a second delay circuit. If the signal transiently exceeds the second reference voltage, the standby signal is set to normal mode.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: March 27, 2018
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Jian Chen
  • Patent number: 9923467
    Abstract: A multiphase converting controller, adapted to control a plural converting circuits coupled to an input voltage to commonly supply an output voltage, is disclosed. The multiphase converting controller comprises a feedback control circuit, an on-time control circuit, and a multiphase logic control circuit. The feedback control circuit determines a conduction starting point in time according to the output voltage and accordingly generates a conduction signal. The on-time control circuit determines a conduction time period. The multiphase logic control circuit controls the plural converting circuit in sequence in accordance to the conduction signal and the conduction time period. The on-time control circuit adjusts a length of the conduction time period according to a mode signal.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: March 20, 2018
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Quan Gan, Shian-Sung Shiu
  • Patent number: 9923520
    Abstract: The present disclosure describes a synchronized switching power supply for a radio frequency (RF) power amplifier. In some aspects, a synchronized power supply circuit comprises a first switch connected between a power rail and a first terminal of an inductor that is connected to an output of the circuit via its second terminal. The circuit also includes a second switch connected between a ground rail and the first terminal of the inductor, and respective gate drivers for the first and second switches. An amplifier of the circuit is connected to the power rail and has an output connected to the output of the circuit. A current sensor is connected between the output of the amplifier and the output of the circuit, with an output of the current sensor being connected to an input of a comparator. A delay circuit is connected between an output of the comparator and the first and second gate drivers, and may synchronize the power supply circuit.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: March 20, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Moataz Abdelsamie Abdelfattah, Iulian Mirea, Song Shi
  • Patent number: 9899924
    Abstract: A switching power converter converts power from an input source for delivery to a load at the converter output. The converter comprises at least two switches connected in series across either the input source or the output, and an inductor connected to a central node between the two switches. A controller operates the converter in a series of converter operating cycles, each operating cycle comprising an input phase, during which one of the two switches is conductive, the inductor receives energy from the input source, and a current in the inductor is increasing positively, phase. The controller is configured to adjust the duration of the input phase, and the amount of energy stored in the inductor at the end of the input phase, as a function of a an amount of energy required to charge or discharge the node capacitance during the energy recycling phase.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: February 20, 2018
    Assignee: VLT, Inc.
    Inventor: Patrizio Vinciarelli
  • Patent number: 9899913
    Abstract: A dual-mode switching D.C.-to-D.C. converter includes a power conversion unit and a switch driver. The power conversion unit generates a D.C. output voltage based on a switch driving signal and a D.C. input voltage. The switch driver performs frequency compensation on the D.C. output voltage to generate a feedback voltage, and compares the feedback voltage with a comparison input signal to generate a pulse-width-modulated signal. The switch driver compares the D.C. output voltage with a first reference voltage to generate a comparison output signal. The switch driver generates the switch driving signal based on the pulse-width-modulated signal in a normal operation mode, and generates the switch driving signal based on the comparison output signal in an abnormal operation mode. The normal operation mode and the abnormal operation mode are based on a load current flowing through a load connected to the switching D.C.-to-D.C. converter.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: February 20, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Ji-Soo Chang
  • Patent number: 9899919
    Abstract: The present disclosure provides an asymmetric switching capacitor regulator that is capable of providing an output voltage, covering a wide voltage range, with a high efficiency. The disclosed switching capacitor regulator is configured to generate a wide range of an output voltage by differentiating a voltage across one or more switching capacitors from a voltage across the rest of the switching capacitors in the switching capacitor regulator.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: February 20, 2018
    Assignee: Lion Semiconductor Inc.
    Inventors: John Crossley, Hanh-Phuc Le, Alberto Alessandro Angelo Puggelli
  • Patent number: 9897670
    Abstract: A coil control device of a magnetic resonance imaging system includes a DC-DC switching converter and a controller. The DC-DC switching converter is configured for switching and converting a DC power supply to a DC current or a DC voltage. An input end of the DC-DC switching converter is connected in parallel to the DC power supply. The controller is configured to control the DC-DC switching converter to switch and provide the DC current or the DC voltage. In some embodiments of the coil control device described herein, two power supplies (e.g., +15 V and ?32 V) may be reduced to one power supply (e.g., +15 V), thereby saving energy and foregoing a water-cooling system.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: February 20, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Yu Ye Liu, JianMin Wang
  • Patent number: 9887650
    Abstract: An inverter device includes a switch circuit configured by series-connecting two N-channel semiconductor switching elements in opposite directions so that the switch circuit makes or breaks electrical connection between a DC power supply and an inverter circuit, and a control circuit carrying out a protecting operation in which when the control circuit outputs a control signal to control switching of the inverter circuit and an operating condition is met, the control circuit stops output of the control signal to turn off all switching elements configuring the inverter circuit and the switch circuit. In the protecting operation, the switch circuit is turned off after output of the control signal has been stopped so that changes in drain-source voltages and drain currents of the N-channel semiconductor switching elements are rendered slower.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: February 6, 2018
    Assignees: KABUSHIKI KAISHA TOSHIBA, NSK Ltd.
    Inventors: Sari Maekawa, Shin Kumagai, Shigeru Fukinuki, Minoru Awazu
  • Patent number: 9886218
    Abstract: An information processing apparatus includes a hard disk drive and a controller that controls the hard disk drive. The information processing apparatus includes a power supply unit that supplies power to the hard disk drive, the controller, and a load resistance, a power control unit that shifts the information processing apparatus from a first power state, in which the power is supplied to the hard disk drive and the controller, to a second power state, in which the power is supplied to the hard disk drive, while limiting supply of the power to the controller that controls the hard disk drive, and a switching unit that switches between stopping supplying the power to the load resistance in the first power state and supplying the power to the load resistance in the second power state.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: February 6, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazuya Saisho
  • 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