Switched (e.g., Switching Regulators) Patents (Class 323/282)
  • Patent number: 10298127
    Abstract: A DCDC converter includes a transconductance amplifier, a comparator, a current driving component, an output impedance, a switch, a clamp resistor and a p-channel FET. The transconductance amplifier outputs a transconductance current and a switch control signal. The comparator has a two n-channel FET inputs forming a differential pair and outputs a compared signal. The current driving component generates an output current based on the compared signal. The output impedance component generates an output DC voltage based on the output current. The switch is between the two n-channel FETs and can open and close based on the switch control signal. The clamp resistor is arranged in series with the switch. The p-channel FET is in series with the clamp resistor and is controlled by the output DC voltage.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: May 21, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Gerhard Thiele, Erich Bayer
  • Patent number: 10298125
    Abstract: The disclosure relates to a DC-DC converter in which a first coil terminal is connected with an input terminal and a second coil terminal is connected, on the one hand, via a rectification switch to an output terminal and, on the other hand, via a control switch to a ground potential and a control circuit is configured to switch in successive switching cycles in each case in a regulating phase the rectification switch to be electrically blocking and the control switch to be electrically conducting, and in a rectifying phase to switch the control switch to be electrically blocking. A measuring component generates a measurement signal which signals a current intensity of a coil current, and a comparator circuit compares the measurement signal with a threshold value and the control circuit keeps the rectification switch electrically blocking in the rectifying phase and conducts the coil current via a bypass diode if the current intensity was continuously lower than the threshold value in the regulating phase.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: May 21, 2019
    Assignee: Continental Automotive GmbH
    Inventors: Christian Stoeger, Emil Kovatchev
  • Patent number: 10298247
    Abstract: This application relates to analog-to-digital converter (ADC) circuitry (200). A time-encoding modulator (TEM 201) has a comparator (104) and a loop filter (105) configured to generate a pulse-width-modulated (PWM) signal (SPWM) in response to an input signal (SIN) and a feedback signal (SFB). A controlled oscillator, such as a VCO (202) receives the PWM signal and generates an output oscillation signal (SOSC) with a frequency that varies based on a drive signal at a drive node (109), e.g. a drive node of a ring oscillator (107). The controlled oscillator (202) comprises at least one control switch (112) controlled by a switch control signal (S1) generated from the received PWM signal so as to control the drive strength of the drive signal applied to the drive node (109). The feedback signal (SFB) for the TEM (201) is derived from the controlled oscillator (202) so as to include any timing error between the PWM signal and the switch control signal (S1) applied to said control switch.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: May 21, 2019
    Assignee: Cirrus Logic, Inc.
    Inventors: Louis Frew, Kapil Sharma, David Paul Singleton, Andrew James Howlett
  • Patent number: 10298130
    Abstract: A switching regulator for generating an output voltage from an input voltage includes a first to fourth switches and is configured to fix an on-duty ratio of the third switch in a step-up/down mode. The switching regulator performs current mode control according to the information of current flowing through the second switch. A step-down control circuit includes a slope voltage generation part that generates a slope voltage, and generates a step-down control signal according to the slope voltage. The slope voltage generation part switches between a first operation of combining a first ramp voltage to stored information of the current to generate the slope voltage and a second operation of combining a second ramp voltage having a slope smaller than a slope of the first ramp voltage to stored information of the current to generate the slope voltage.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: May 21, 2019
    Assignee: Rohm Co., Ltd.
    Inventors: Yuhei Yamaguchi, Tetsuo Tateishi
  • Patent number: 10291116
    Abstract: An output control method for a controller includes the following steps. At each of detection time points, the controller detects a detection voltage value and a detection current value of a load. In a voltage control mode, the controller generates a setting parameter to control the power amplifier according to part of the detection voltage values. In a current control mode, the controller generates the setting parameter to control the power amplifier according to part of the detection current values. When the controller switches to the voltage control mode or the current control mode, the controller determines a ratio between the detection current value and the detection voltage value at one of the detection time points and the setting parameter is generated according to the ratio. Therefore, the bandwidth is substantially the same no matter if the controller operates in the voltage control mode or the current control mode.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: May 14, 2019
    Assignee: CHROMA ATE INC.
    Inventors: Tsz-Lang Chen, Ming-Chieh Lin, Wen-Min Yang
  • Patent number: 10283995
    Abstract: A battery charger and methods for magnetically transferring power from a power source to a battery is disclosed. A driver circuit outputs a modulated signal having a duty cycle from the power source to a sender-side circuit and across a space to a receiver-side tuned circuit. A sender-side sensor is configured to sense a parameter of the sender-side tuned circuit. The controller modifies the first duty cycle of the modulated signal based on the sensed parameter. A receiver-side circuit capable of determining charge status of the receiver side is also disclosed.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: May 7, 2019
    Assignee: L'Oreal
    Inventor: David Allen Gunderson
  • Patent number: 10284085
    Abstract: A switching regulator includes a comparator, an on-time control circuit, an R-S flip-flop circuit, and a timer circuit that outputs a count-up signal, where the comparator switches an operation current to a low current consumption mode in response to the count-up signal so as to reduce the operation current in a light load operating mode.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: May 7, 2019
    Assignee: ABLIC INC.
    Inventors: Akihiro Kawano, Katsuya Goto
  • Patent number: 10284101
    Abstract: A switching power supply apparatus includes a PFM control circuit that outputs a clock signal Set such that a switching frequency of a switching element varies in accordance with a load state. The clock signal Set determines a turn-on timing of the switching element. A reference value of a current flowing through the switching element determines a turn-off timing of the switching element. A modulation signal is applied to the turn-off timing of the switching element to modulate one of a peak value of a drain current flowing through the switching element and an on-time of the switching element. Input control is performed separately on the clock signal Set and the modulation signal. Accordingly, even when the clock signal Set and the modulation signal contribute to each other to offset each other, modulation effects are not cancelled.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: May 7, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kensuke Takahashi, Takashi Saji
  • Patent number: 10284079
    Abstract: A DC-DC power converter circuit includes a switched-capacitor circuit, an error amplifier, a latched comparator and a switching controller. The error amplifier adjusts an error amplification signal of the error amplifier in response to an output voltage of the switched-capacitor circuit and a reference voltage. The error amplification signal is then fed to the latched comparator as a comparison reference, resulting in the DC-DC power converter circuit being able to more precisely maintain the output voltage within a predetermined range.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: May 7, 2019
    Assignee: NUVOTON TECHNOLOGY CORPORATION
    Inventors: Chung-Ming Hsieh, Wei-Chan Hsu
  • Patent number: 10284075
    Abstract: An overvoltage protection circuit is provided which is connected between a rectifier circuit and a load including an input capacitor element connected to both ends of the load. The overvoltage protection circuit includes a semiconductor switch connected between the rectifier circuit and the load, and a control circuit controls the semiconductor switch. When the rectified voltage exceeds a predetermined value, the control circuit turns off the semiconductor switch, and detects a voltage potential difference between both ends of the semiconductor switch, and then, for an interval when the voltage potential difference is zero or a predetermined minute value, the control circuit generates a control voltage for turning on the semiconductor switch, and outputs the control voltage to a control terminal of the semiconductor switch. The overvoltage protection circuit includes a current change circuit that gradually changes a current flowing through the semiconductor switch.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: May 7, 2019
    Assignees: RICOH ELECTRONIC DEVICES CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventors: Shohtaroh Sohma, Yuji Takeyama, Kimihiro Nishijima
  • Patent number: 10277217
    Abstract: The subject matter of this specification can be embodied in, among other things, a method that includes providing first power received from a first power bus to a first switching device configured to switch first power to a first output port based on a first input signal received at a first input port, providing second power received from a second power bus to a second switching device configured to switch second power to a first bootstrap capacitor coupled between the second switching device and the first output port based on a second input signal received at a second input port, providing an output voltage to the first output port, providing the second input signal to the second input port, switching the second switching device based on the second input signal, and charging the first bootstrap capacitor with second power received from the second power bus.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: April 30, 2019
    Assignee: Woodward, Inc.
    Inventors: Konstantin Lakirovich, Steven Adams
  • Patent number: 10277151
    Abstract: An apparatus for driving an actuator includes a driving coil configured to generate magnetic force depending on driving signals, a control circuit configured to provide a first control signal and a second control signal, and a driving circuit including a high-side switch and a low-side switch connected to the driving coil, the high-side switch and the low-side switch configured to generate the driving signals based on the first and second control signals, respectively, and to provide the driving signals to the driving coil, wherein the control circuit is further configured to control the driving circuit so that the high-side switch is operated as a current source using the first control signal, and to control the driving circuit so that the low-side switch is driven in a pulse width modulation (PWM) scheme using the second control signal.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: April 30, 2019
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Sung Man Pang
  • Patent number: 10276351
    Abstract: Provided is a high-frequency power generator with an enhanced pulse function, which supplies high-frequency power to a plasma load. The high-frequency power generator may include: a rectifier configured to receive AC power and rectify the received AC power; a DC-DC converter configured to adjust an output voltage by switching an output of the rectifier; an RF power amplifier configured to amplify an output of the DC-DC converter, and transfer high-frequency power with a pulse waveform to the plasma load; an RF power controller configured to control the output and pulse waveform of the RF power amplifier; and a DC-DC converter controller configured to receive a pulse signal from the RF power controller, and control a duty ratio of switching elements constituting the DC-DC converter.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: April 30, 2019
    Assignees: NEWPOWERPLASMA CO., LTD., Sungkyunkwan University Research & Business Foundation
    Inventors: Jongwoon Kim, Eunmin Jeon, Youngchul Kim, Minjae Kim
  • Patent number: 10277126
    Abstract: This converter includes a controllable switch (M) and a control device (311) for generating a signal for controlling the opening and closing instants of the switching switch, the control device being of the control device type in a current mode requiring the application of a current stabilization signal. The control device includes a component (20) delivering a stabilization signal (RC) intermittently, by applying the stabilization signal (RC) at a predetermined instant which precedes a reference instant; and a comparator (28) for generating a control signal (CM) of the controllable switch (M) from the comparison of a set value signal (ÎL) and of a measurement signal corresponding to the current (IL) flowing in an impedance (L) of the converter, the intermittent stabilization signal (RC) being subtracted from the set value signal (ÎL) or added to the measurement signal before applying the comparator.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: April 30, 2019
    Assignee: THALES
    Inventors: François Klein, Christophe Taurand
  • Patent number: 10271340
    Abstract: Methods and systems to help manage wireless communication with UEs in a manner that takes into account an extent of TTI bundling on a given carrier frequency. When a base station is serving a threshold high number of TTI-bundling-UEs on a first carrier frequency, the base station will reduce the number of TTI-bundling-UEs on the first carrier frequency by offloading one or more of the TTI-bundling-UEs from the first carrier frequency to a second carrier frequency. Further, to avoid increasing the number of TTI-bundling-UEs served on the first carrier frequency, when the base station detects a trigger event for enabling TTI bundling for an additional UE served on the first carrier frequency, the base station will offload the additional UE from the first carrier frequency to the second carrier frequency.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: April 23, 2019
    Assignee: Sprint Spectrum L.P.
    Inventors: Hemanth B. Pawar, Krishna Sitaram, Shilpa K. Srinivas
  • Patent number: 10263518
    Abstract: According to an embodiment, a method of operating a switching power supply includes applying a periodic switching signal to a first switch that is coupled to an output node, detecting an offset delay between applying the periodic switching signal and a change in voltage of the output node, calculating a corrected midpoint of a half phase of the periodic switching signal based on the offset delay, generating a sampling pulse based on the corrected midpoint, and sampling a current at the output node according to the sampling pulse.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: April 16, 2019
    Assignee: INFINEON TECHNOLOGIES AG
    Inventors: Emanuele Bodano, Luca Bizjak, Maria Lagioia, Joachim Pichler
  • Patent number: 10256725
    Abstract: According to an embodiment, a current detection circuit includes a transistor, an operational amplifier, and a transistor. In the transistor, the source and the gate are coupled to the source and the gate of a transistor which is provided on a high side of a drive circuit. The operational amplifier amplifies a potential difference between a drain voltage of the transistor and a drain voltage of the transistor. The transistor is provided over a current path through which a current flowing to the transistor flows, and which has the gate to which an output voltage of the operational amplifier is supplied. A value of the current flowing through the transistor is detected based on a value of the current flowing through the transistor.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: April 9, 2019
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Hideyuki Tajima
  • Patent number: 10249229
    Abstract: A power switching circuit and a method for controlling the same are disclosed herein. The power switching circuit includes a frequency control circuit, a pulse modulation circuit, and a switching convertor. The frequency control circuit receives a first reference signal driving a load, from a timing controller, and generates a second reference signal based on the first reference signal. The pulse modulation circuit generates a pulse control signal by performing pulse width modulation (PWM) or pulse frequency modulation (PFM) on the second reference signal. The switching convertor generates the voltage of output power by switching a switching element connected to the output power, in response to the pulse control signal. The pulse control signal is synchronized with the first reference signal driving the load.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: April 2, 2019
    Assignee: Silicon Works Co., Ltd.
    Inventors: Yoon Soo Shin, Ji Woong Han, Dea Hwan Lee
  • Patent number: 10250011
    Abstract: Driver circuitry including an inductor configured to be used both as an inductor of a buck converter and to provide high-speed pulse driving of a load. The driver circuitry includes the buck converter, which includes a first switch, a second switch and a comparator configured to drive the first switch and the second switch. The inductor is connected between the first switch and the second switch of the buck converter and the load and supplies current to drive the load.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: April 2, 2019
    Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventors: Ward Van Der Tempel, Maarten Kuijk, Gobinath Jegannathan
  • Patent number: 10250122
    Abstract: A controller controls Pulse Width Modulation (PWM) signals of one or more phases. The controller includes a phase sequencer to select a phase, a common ramp generator generating a common ramp signal, a phase activation circuit to turn on the PWM signal of the selected phase based on the common ramp signal, and for each phase a Current Sense plus Ramp (CSR) signal generator to generate a phase CSR signal according to a current of the phase and a phase deactivation circuit to turn off the PWM signal of the phase based on the phase CSR signal. A method of controlling PWM phases comprises selecting a phase, generating a common ramp signal, turning on the PWM signal of the selected phase based on the common ramp signal, generating CSR signals according to currents of the phases, and turning off the PWM signals based on the respective CSR signals.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: April 2, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Gang Chen, Gabor Reizik
  • Patent number: 10250146
    Abstract: The present disclosure provides a soft-start power supply circuit, a method for controlling the same, and a display device. The soft-start power supply circuit includes: a soft-start circuitry configured to pull up a potential of a feedback voltage terminal to a potential of an input voltage terminal during a first phase of an operating cycle and to pull down the potential of the feedback voltage terminal to a potential of a ground terminal during a second phase of the operating cycle; a feedback operation circuitry configured to control a driving circuitry to be turned off during the first phase and control the driving circuitry to be turned on and off alternately during the second phase; a driving circuitry configured to, in an on state, output a signal of the input voltage terminal after rectifying and filtering by a rectifying and filtering circuitry to an output voltage terminal.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: April 2, 2019
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xiaofei Peng, Jiacheng Huang
  • Patent number: 10250135
    Abstract: In one embodiment, a control circuit configured to control a switch mode power supply, can include: (i) a compensation signal generating circuit configured to generate a compensation signal according to an error between an output voltage feedback signal and a first reference voltage of the switch mode power supply; (ii) a switching signal generating circuit configured to control a switching operation of a power switching device of the switch mode power supply according to the compensation signal; (iii) a judge circuit configured to determine an operation state of the switch mode power supply according to the output voltage feedback signal; and (iv) a loop gain regulating circuit configured to regulate a loop gain of the control circuit according to the operation state.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: April 2, 2019
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Feng Yu, Chen Zhao
  • Patent number: 10250128
    Abstract: A transient response circuit provides faster transient response time of an electronic device so that less overshoot or undershoot of an output signal of the electronic device occurs when a large load and/or line transient signal is present at an input and/or output terminal of the electronic device. The transient response circuit has a transient detection circuit and an assist circuit. The transient detection circuit monitors a feedback signal applied to an input terminal of the control stage, and generates transient detection signals indicating that detection of a large load and/or line transient signal has occurred. The assist circuit communicates receives the transient detection signal and charges or discharges a loop filter capacitor of the control stage for causing the control stage to regulate the output signal to decrease overshoot or undershoot upon receipt of the transient detection signal.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: April 2, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Naoyuki Unno, Soichiro Ohyama, Hidenori Kobayashi
  • Patent number: 10250136
    Abstract: A method for controlling a DC-DC converter including an energy accumulation element, an energy storage element and a switching element, said control method including the following steps implemented by a control unit: a step of generating a control signal for the switching element with a duty cycle ? that is a function of information relating to the output electrical conditions of said converter; a step of controlling said switching element by means of said control signal; a step of compensating said control signal for a continuous conduction mode; a step of compensating said control signal for a discontinuous conduction mode; and a step of estimating the current operating mode of said converter in order to control the implementation either of the compensation step or of the compensation step as a function of the estimated current operating mode. The invention further relates to a DC-DC converter for implementing said control method.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: April 2, 2019
    Assignee: SAFRAN ELECTRONICS & DEFENSE
    Inventor: Louis Grimaud
  • Patent number: 10241531
    Abstract: According to an embodiment of the present invention, a power supply device includes a switching circuit, a detection circuit, a first comparator, a current source circuit, and a delay circuit. The switching circuit performs switching control of a power supply voltage. The detection circuit detects an output voltage from the switching circuit. The first comparator compares the voltage detected by the detection circuit with a first reference voltage which is set in advance. The current source circuit outputs a bias current which has correlation with the power supply voltage. The delay circuit receives the bias current from the current source circuit, and outputs, to the switching circuit, a delay time which corresponds to an increase time of the output voltage, by using the bias current in accordance with the result of comparison performed by the first comparator.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: March 26, 2019
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Tatsuhiko Maruyama
  • Patent number: 10243555
    Abstract: A method of turning on a power semiconductor switch includes receiving a first signal that characterizes a switch-on behavior of the power semiconductor switch, and detecting two or more phases of the switch-on behavior of the power semiconductor switch in response to the first signal. The method further includes detecting a peak indicative of a phase transition between the two or more phases, generating a phase signal indicative of the two or more phases, and providing a variable current to a control input of the power semiconductor switch in response to the first signal.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: March 26, 2019
    Assignee: Power Integrations, Inc.
    Inventor: Matthias Johannes Siebler
  • Patent number: 10243464
    Abstract: A controller including a voltage synthesizer for a switching regulator includes a synthesizer input to be coupled to an input of the regulator. First and second replica switching transistors are connected at a first node. A resistor couples between the first node and a second node, and a capacitor couples between the second node and ground. A transconductance stage compares a voltage sampled onto the capacitor to the output voltage of the regulator and generates an output signal in response to the comparison. A first switch couples between first and second inputs of the transconductance stage. The first switch is turned on during each cycle of operation of the voltage synthesizer to reset the capacitor voltage to the output voltage of the regulator.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: March 26, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Syed Wasif Mehdi, Neil Gibson, Antonio Priego
  • Patent number: 10243548
    Abstract: A gate driver circuit for driving a high-side switch is disclosed. The gate driver circuit comprises a sample and level-shift circuit. The sample and level-shift circuit is connected to the high-side switch. The gate driver circuit further comprises a sampling capacitor. The sampling capacitor is configured to sample an output voltage of an at least one amplifier. The gate driver circuit additionally includes at least one voltage supply. The at least one voltage supply is connected to the at least one amplifier. The sampling capacitor is configured to charge a gate capacitance of the high-side switch, and the at least one amplifier is configured to limit a high-side switch output current.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: March 26, 2019
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventor: Sureshkumar Ramalingam
  • Patent number: 10243449
    Abstract: Some apparatus and associated methods relate to a buck-derived switched mode power supply with three-quarter bridge (TQB) formed with a bypass switch in parallel with an inductor. In an illustrative example, the bypass switch may be configured to, in response to a decrease in average load demand, operate in a first mode to turn on the bypass switch to selectively circulate inductor current through the bypass switch while a high-side switch and a low-side switch are off. In a second mode, the bypass switch may be turned off to circulate the inductor current through, for example, an output capacitor and the low-side switch. In some implementations of the TQB, the bypass switch may be operated, for example, to selectively transfer a controlled amount of energy stored in the inductor to the output capacitor in response to a decrease in average load demand.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: March 26, 2019
    Assignee: Alpha and Omega Semiconductor (Cayman) Limited
    Inventor: Chris M. Young
  • Patent number: 10234883
    Abstract: A voltage regulator circuit is disclosed. In one embodiment, a low drop-out (LDO) voltage regulator includes a voltage loop and a current loop. The current loop includes a source follower coupled to an output node of the LDO voltage regulator, the source follower being implemented with a PMOS transistor. The current loop also includes a current mirror coupled between a first branch of the current loop and a second branch of the current loop. The source follower is implemented in the second branch of the current loop. The voltage loop includes an amplifier circuit having an inverting input coupled to the output node, and a non-inverting input coupled to receive a reference voltage. The output of the amplifier is coupled to the gate terminal of the PMOS transistor of the current mirror.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: March 19, 2019
    Assignee: Apple Inc.
    Inventors: Dingkun Du, Jay B. Fletcher
  • Patent number: 10236864
    Abstract: A bus coupler for coupling field devices to a superordinate bus system includes an impedance converter arranged in a series circuit with a terminating resistor between a signal input and a field device output to enable a comprehensive diagnosis option separately for each transmission line and the connected field device, wherein the terminating resistor assumes the function of a line terminating resistor and a current limitation, and where a controllable reference voltage source enables the maximum output current to be defined and the output shut off.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: March 19, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventor: Hans Volkmann
  • Patent number: 10230311
    Abstract: A method prevents shoot-through currents and reduces body-diode conduction time in an inverter circuit by changing dead times for transistors in the inverter circuit. A sensing resistor senses temperatures of transistors in the inverter circuit. A delay generator changes delay times in response to receiving the temperatures of the transistors from the sensing resistor. A dead time generation unit changes the dead times for the transistors in response to changes in the delay times.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: March 12, 2019
    Assignee: Hong Kong Applied Science and Technology Research Institute Co. Ltd.
    Inventors: Ziang Chen, Jun Chen, Hang Sang Lee
  • Patent number: 10224800
    Abstract: Techniques for indicating a load level of a DC-DC switching converter are provided. IN an example, a method for real-time load current detection for a switching converter using a discontinuous conduction mode (DCM) of operation can include generating a minimum DCM current threshold based on an reference current source and a duty cycle of the switching converter, receiving a representation of inductor charge current from power switch of the switching converter at a comparator, comparing the representation to the DCM current threshold, and controlling the power switch using a discontinuous conduction mode of the switching converter when a peak of the representation exceeds the minimum DCM current threshold.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: March 5, 2019
    Assignee: Analog Devices Global
    Inventors: Danzhu Lu, Bin Shao
  • Patent number: 10224821
    Abstract: System and method for adjusting a threshold of a power conversion system. The system includes a threshold generator configured to receive a first signal and generate a threshold signal based on at least information associated with the first signal, a comparator configured to receive the threshold signal and a second signal and generate a comparison signal, and a gate driver configured to generate a drive signal based on at least information associated with the comparison signal. The gate driver is coupled to at least a switch configured to receive the drive signal and affect a current flowing through a primary winding coupled to a secondary winding. If the second signal is larger than the threshold signal in magnitude, the drive signal causes the switch to open. The drive signal is associated with a switching frequency.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: March 5, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Jinya Dong, Xiuhong Zhang, Lieyi Fang
  • Patent number: 10225897
    Abstract: A multifunction electronic power supply for LED lighting appliances. A series of interface ports or connectors, a block for filtering and measuring the voltage and current, connected to the main power supply, an auxiliary power supply, a microcontroller, a flyback converter with isolated output, a circuit for measuring the brightness, a light sensor, which detects the light reflected from the floor and from the objects and/or people present in the area which is illuminated by the lighting appliance, and a LED light source of the lighting appliance, which spreads light in the environment and which is driven by the electronic power supply.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: March 5, 2019
    Assignee: Beghelli S.p.A.
    Inventor: Gian Pietro Beghelli
  • Patent number: 10224814
    Abstract: A control circuit of a switching power-supply device that converts a first DC voltage supplied from an input power source into a second DC voltage by turning on/off a switching element connected between the input power source and an inductor and outputs the second DC voltage, the control circuit includes a drive circuit that, when a control signal to turn on the switching element is received, drives the switching element by supplying a plurality of drive voltages starting in order from a lowest drive voltage among the plurality of drive voltages, to a control terminal of the switching element.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: March 5, 2019
    Assignee: Sanken Electric Co., LTD.
    Inventor: Masaru Nakamura
  • Patent number: 10222735
    Abstract: A fixing apparatus includes a transformer, a heater, a temperature acquiring portion, and control portion. A first switching unit allows or cuts off power supply from a primary-side circuit to the heater by supplying power, and a second switching unit allows or cuts off power supply from the primary-side circuit to the temperature acquiring portion by supplying power. The power supply to the heater can be allowed or cut off according to the temperature of the heater acquired by the temperature acquiring portion. In addition, the control portion cuts off power supply from the primary-side circuit to the heater and power supply from the primary-side circuit to the temperature acquiring portion by controlling operations of the first switching unit and the second switching unit with the one signal.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: March 5, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kouji Yasukawa, Tsuyoshi Yamaguchi
  • Patent number: 10224820
    Abstract: A circuit for regulating an output level of a power converter includes an adjustment circuit to be coupled to a receive a feedback signal representative of an output level of the power converter. The adjustment circuit is coupled to generate a comparison result signal. A control circuit is coupled to receive the comparison result signal and an oscillating signal. A switch including a first terminal, a second terminal and a control terminal is coupled to the control circuit. The control circuit is coupled to generate a control signal to control switching of the switch. The switch is operable to couple or decouple the first terminal and the second terminal in response to the control signal received at the control terminal. The control signal is responsive to the oscillating signal and to a change in the comparison result signal.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: March 5, 2019
    Assignee: Power Integrations, Inc.
    Inventors: Alex B. Djenguerian, Andrew J. Morrish, Arthur B. Odell, Kent Wong
  • Patent number: 10218279
    Abstract: Controllers and methods for controlling power supplies are disclosed herein. An example of a controller includes comparison circuitry operable to compare a switching frequency of the controller to a predetermined switching frequency. Voltage measuring circuitry is operable to measure the output voltage of the power supply. Circuitry is operable to disable at least one component in the power supply in response to the switching frequency being less than the predetermined switching frequency and the output voltage being greater than a predetermined output voltage.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: February 26, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Rosario Stracquadaini, Antonio Amoroso, Salvatore Giombanco
  • Patent number: 10218263
    Abstract: A controller includes a switch controller coupled to a power switch coupled to an energy transfer element. The switch controller is coupled to receive a current sense signal representative of a drain current through the power switch. The switch controller is coupled to generate a drive signal to control switching of the power switch in response to the current sense signal and a modulated current limit signal to control a transfer of energy from an input to an output of the power converter. A control modulator is coupled to generate a first signal. A jitter modulator is coupled to generate a second signal. The second signal is a periodic signal having a modulation time period that is greater than a switching period of the drive signal. An arithmetic operator circuit is coupled to generate the modulated current limit signal in response to the first signal and the second signal.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: February 26, 2019
    Assignee: Power Integrations, Inc.
    Inventors: Roland Sylvere Saint-Pierre, Giao Minh Pham, Lance M. Wong, David Michael Hugh Matthews
  • Patent number: 10211731
    Abstract: A semiconductor device includes: a first switching power supply part including a switching element, an inductor connected to the switching element, and a pulse width modulation (PWM) driving signal generating part configured to generate a PWM driving signal having a duty controlled based on a feedback of an output voltage, wherein the switching power supply part is configured to switching-drive the switching element based on the PWM driving signal to generate the output voltage from an input voltage and supply the output voltage to a load; and an abnormality detecting part having a duty calculation part configured to calculate the duty of the PWM driving signal and a comparing part configured to compare the calculated duty and a predetermined first threshold value to output a first detection signal to indicate abnormality when the duty is lower than the first threshold value.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: February 19, 2019
    Assignee: Rohm Co., Ltd.
    Inventor: Wataru Suzuki
  • Patent number: 10211734
    Abstract: A bidirectional converter with high voltage gain and low switch voltage stress is provided. The bidirectional converter has a first input-output terminal and a second input-output terminal, and includes first and second inductors, first and second high side switch modules, first and second low side switch modules, a first clamping capacitor, first and second capacitors, and a switching control circuit. The switching control circuit is configured to switch between three switching modes.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: February 19, 2019
    Assignee: HUANG-JEN CHIU
    Inventor: Huang-Jen Chiu
  • Patent number: 10211796
    Abstract: A switching amplifier circuit (50) connected to drive an impedance-based antenna drive circuit (55) includes high side and low side switches (51-54) configured and connected to connect different reference voltages to first and second output nodes (ANTP, ANTN) in response to gating control signals during an active phase and a disabled phase, and also includes an output drive circuit (59) that provides a ramped output voltage drive signal to the first output node while the second output node is connected over the second low side electronic switch to the second reference voltage during a transition phase of operation between the disabled phase and active phase, where the ramped output voltage drive signal is characterized by a predetermined slew-rate between the second reference voltage and the first reference voltage over a specified time interval.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: February 19, 2019
    Assignee: NXP B.V.
    Inventor: Hermanus J. Effing
  • Patent number: 10211643
    Abstract: A switching module comprising at least one current sense component.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: February 19, 2019
    Assignee: NXP USA, Inc.
    Inventors: Alexander Petrovich Soldatov, Vasily Alekseyevich Syngaevskiy, Gennady Mihaylovich Vydolob
  • Patent number: 10205448
    Abstract: This invention provides a switch control circuit and a switch circuit. When a main transistor on-time reaches a constant on-time, whether an inductor current reaches an instruction current is detected; if the inductor current fails to reach the instruction current, the main transistor on-time is prolonged; the main transistor is turned off and the auxiliary transistor is turned on until the inductor current reaches the instruction current or exceeds the instruction current by a certain threshold; when the main transistor is turned off and the auxiliary transistor is turned on, the inductor current is detected in real time to check whether the inductor current is smaller than the instruction current, and the auxiliary transistor is turned off and the main transistor is turned on again if yes.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: February 12, 2019
    Assignee: JOULWATT TECHNOLOGY (HANGZHOU) CO., LTD.
    Inventors: Feng Xu, Pitleong Wong, Yuancheng Ren, Xunwei Zhou
  • Patent number: 10202925
    Abstract: According to the present invention, by providing control whereby a rising slope or a descending slope of step-up current flowing to a step-up coil is detected, and corrections are made to step-up switching control, the step-up upper and lower limit current values of the step-up circuit can be controlled within intended current threshold values regardless of constant modifications or change in characteristics due to fluctuations of the battery power supply voltage or degradation of step-up circuit elements over time; heat emission by step-up circuit elements can be kept to a minimum; and the step-up recovery time can be adjusted to a constant value regardless of the slope of the step-up current.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: February 12, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Satoshi Kojima, Takuya Mayuzumi
  • Patent number: 10199939
    Abstract: A multi-phase switching power converter includes a panic mode detector that triggers the activation of each phase in an open-loop mode of operation in which an open-loop duty cycle is used that is greater than a closed-loop duty cycle used during closed-loop operation for the active phases.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: February 5, 2019
    Assignee: DIALOG SEMICONDUCTOR (UK) LIMITED
    Inventors: Kevin Yi Cheng Chang, James Doyle, Qing Li, Xiaoying Yu, Ibiyemi Omole, Jonathon Stiff, Erik Mentze, Aysel Yildiz
  • Patent number: 10193443
    Abstract: System and method for regulating a power conversion system. For example, a system controller for regulating a power conversion system includes an amplifier, a variable-resistance component, a capacitor, and a modulation and drive component. The amplifier is configured to receive a reference signal and a feedback signal associated with an output signal of the power conversion system, the amplifier including an amplifier terminal. The variable-resistance component is associated with a first variable resistance value, the variable-resistance component including a first component terminal and a second component terminal, the first component terminal being coupled with the amplifier terminal. The capacitor includes a first capacitor terminal and a second capacitor terminal, the first capacitor terminal being coupled with the second component terminal. The modulation and drive component includes a first terminal and a second terminal, the first terminal being coupled with the amplifier terminal.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: January 29, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yaming Cao, Dongze Yang, Qiang Luo, Lieyi Fang
  • Patent number: 10193447
    Abstract: The present invention provides a DC topology circuit, which provides a subtractor in the control chip and a control module which is electrically connected with the output terminal of the subtractor. The two input terminals of the subtractor are respectively inputted with the input voltage and the load-rated voltage, and the input voltage and the load-rated voltage are subtracted by the subtractor. The control module controls the conduction or not of the plurality of field effect transistors according to the operation result, so that the DC topology circuit enters the different working mode, when the load uses the same connection port and communication protocol, the DC topology circuit can supply different loads with different rated voltages, and increase the application range of the DC topology circuit.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: January 29, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Dan Cao
  • Patent number: 10193434
    Abstract: This power conversion device includes: conversion devices for supplying AC powers to respective phases with respect to the neutral point of a three-phase AC system via reactors; and a control unit for controlling the conversion devices. Each conversion device includes: a step-up circuit for stepping up the DC input voltage value of DC power; and a single-phase inverter circuit.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: January 29, 2019
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Toshiaki Okumura, Naoki Ayai