Switched (e.g., On-off Control) Patents (Class 323/271)
  • Patent number: 10411605
    Abstract: System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes a first controller terminal and a second controller terminal. Additionally, the system controller is configured to receive an input signal at the first controller terminal, and generate a drive signal at the second controller terminal based at least in part on the input signal to turn on or off a transistor in order to affect a current associated with a secondary winding of the power conversion system. Moreover, the system controller is further configured to determine whether the input signal is larger than a first threshold at a first time, in response to the input signal being determined to be larger than the first threshold at the first time, determine whether the input signal is smaller than a second threshold at a second time.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: September 10, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yaming Cao, Zhenglan Xia, Yuan Lin, Qiang Luo, Lieyi Fang
  • Patent number: 10411604
    Abstract: System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes a first controller terminal and a second controller terminal. Additionally, the system controller is configured to receive an input signal at the first controller terminal, and generate a drive signal at the second controller terminal based at least in part on the input signal to turn on or off a transistor in order to affect a current associated with a secondary winding of the power conversion system. Moreover, the system controller is further configured to determine whether the input signal is larger than a first threshold at a first time, in response to the input signal being determined to be larger than the first threshold at the first time, determine whether the input signal is smaller than a second threshold at a second time.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: September 10, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yaming Cao, Zhenglan Xia, Yuan Lin, Qiang Luo, Lieyi Fang
  • Patent number: 10411698
    Abstract: An apparatus that includes a first device connected to an inductor. The first device includes a first silicon carbide (SiC) junction gate field-effect transistor (JFET), a first SiC schottky barrier diode (SBD) connected to a gate and a drain of the first SiC JFET, and a first silicon (Si) transistor connected to transmit current to a source of the first SiC JFET. An inductor input terminal is connected to the drain of the first SiC JFET.
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: September 10, 2019
    Assignee: RENESAS ELECTRONICS AMERICA INC.
    Inventors: Tetsuo Sato, Koichi Yamazaki
  • Patent number: 10411581
    Abstract: A switching power conversion apparatus includes: a multi-level power stage, a PWM control circuit, a multi-level driver circuit, a bootstrap capacitor control circuit and a driving power control circuit. The bootstrap capacitor control circuit includes bootstrap capacitor control switches. During a charging period, a bootstrap control signal controls the bootstrap capacitor control switches, to electrically connect a second bootstrap node to the ground voltage level, whereby the supply voltage charges the bootstrap capacitor via the bootstrap diode. During a pumping period, the bootstrap control signal controls the bootstrap capacitor control switches to electrically connect the second bootstrap node to one of the upper-gate nodes or the switching node, whereby the voltage of the first bootstrap node is pumped to a corresponding pumping voltage level.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: September 10, 2019
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Wei-Jen Huang, Shun-Yu Huang
  • Patent number: 10403600
    Abstract: A device includes a semiconductor die. The semiconductor die has formed thereon a plurality of multi-phase voltage regulator modules of the same design formed on a common semiconductor substrate.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: September 3, 2019
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Nick Samra, Alan Roth, Eric Soenen, Stefan Rusu, Paul Ranucci
  • Patent number: 10404165
    Abstract: Described herein are systems and methods for providing a variable switching frequency for a power supply. The system includes a controller and a filter. The controller generates a switching frequency for a power supply. The switching frequency is modified as a function of an input voltage and an output voltage. The filter provides the output voltage to a load based at least in part on the switching frequency generated by the controller. In one example, the controller adaptively modifies the switching frequency as a function of the input voltage and the output voltage in order to maintain a peak to peak current for an inductor.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: September 3, 2019
    Assignee: SEMTECH CORPORATION
    Inventors: Min Mao, Steven M. Granger, Kun Xing
  • Patent number: 10404168
    Abstract: A power converter comprises a first switch and a second switch connected in series between an input power source and ground, an inductor connected between a common node of the first switch and the second switch, and an output capacitor and a comparator having a first input connected to a reference, a second input configured to receive a sum of a first feedback signal and a second feedback signal and an output configured to generate a turn-on signal of the first switch, wherein the first feedback signal is proportional to an voltage across the output capacitor and the second feedback signal is generated by applying at least one low-pass filter to a switching ripple voltage.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: September 3, 2019
    Assignee: Active-Semi (BVI), Inc.
    Inventors: Narasimhan Trichy, Masashi Nogawa
  • Patent number: 10389226
    Abstract: A controller for use in a switched mode power converter includes a comparator coupled to compare an output sense signal representative of an output of the switched mode power converter to a target value. A ripple compensation block is coupled to generate a compensation signal in response to the output sense signal. The compensation signal is a fraction of the output sense signal. A request control is coupled to generate a request signal having a request frequency in response to an output of the comparator and a clock signal to control an operational state of a power switch of the switched mode power converter. The request control is further coupled to receive the compensation signal to modulate the request frequency of the request signal with the compensation signal in response to the output of the comparator to provide ripple compensation at the output of the switched mode power converter.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: August 20, 2019
    Assignee: Power Integrations, Inc.
    Inventors: Tiziano Pastore, Sundaresan Sundararaj
  • Patent number: 10389274
    Abstract: A power converter can be implemented with a boosted-output inverter, which integrates the functionality of a voltage converter (e.g., boost converter) and a voltage inverter. In particular, a boosted-output inverter includes a primary tank inductor coupled in series with a secondary tank inductor at a central node. The boosted-output inverter also includes two voltage-controlled switches that respectively define a charging phase and a discharging phase of the primary tank inductor. While the primary tank inductor is charging, the secondary tank inductor is inverted to ground. In this manner, current though the secondary tank inductor alternates at a voltage boosted by the fly-back voltage of the primary tank inductor exhibited when the primary tank inductor transitions from the charging mode to the discharging mode. In many cases, the secondary tank inductor is a transmit coil of a transmitter of a wireless power transfer system.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: August 20, 2019
    Assignee: APPLE INC.
    Inventors: Weihong Qiu, Rohan Dayal, Zaki Moussaoui
  • Patent number: 10389246
    Abstract: A switched-mode power regulator circuit has four solid-state switches connected in series and a capacitor and an inductor that regulate power delivered to a load. The solid-state switches are operated such that a voltage at the load is regulated by repetitively (1) prefluxing the inductor then charging the capacitor causing an increased current to flow in the inductor and (2) prefluxing the inductor then discharging the capacitor causing increased current to flow in the inductor. The inductor prefluxing steps enable the circuit to provide increased output voltage and/or increased output current.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: August 20, 2019
    Assignee: Empower Semiconductor, Inc.
    Inventors: David Lidsky, Timothy Alan Phillips, Parag Oak
  • Patent number: 10389244
    Abstract: A feedback system that can control hybrid regulator topologies that have multiple converters or regulators connected in series is described. The hybrid regulator can include at least two regulators: a switched inductor regulator and a switched-capacitor regulator. The feedback system can simplify feedback design for the hybrid regulator that can include multiple converter stages and can control the feedback to improve the efficiency of a hybrid regulator.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: August 20, 2019
    Assignee: Lion Semiconductor Inc.
    Inventors: Hanh-Phuc Le, John Crossley, Alberto Alessandro Angelo Puggelli, Wonyoung Kim
  • Patent number: 10381925
    Abstract: A power supply apparatus includes first through M-th switching regulators, first through N-th multiplexers, and first through N-th linear regulators, where each of M and N is a natural number greater than or equal to two. The first through M-th switching regulators generate first through M-th reference power signals using an input power signal. The first through N-th multiplexers select one of the first through M-th reference power signals, in response to a power selection signal, to provide first through N-th selection power signals. The first through N-th linear regulators generate first through N-th output power signals using the first through N-th selection power signals. The first through N-th linear regulators are connected to the first through N-th multiplexers, respectively.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: August 13, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seong-Kwan Lee, Sung-Chul Chun, Sung-Yeol Kim, Jae-Hong Kim
  • Patent number: 10374413
    Abstract: A switching power supply detects a short circuit to ground, for example, by comparing a soft-start voltage Vss with a feedback voltage Vfb while securing an offset voltage ?V. The switching power supply includes, for example, a short-circuit-to-ground detection circuit which detects a short circuit to ground at a monitoring target terminal. When a short circuit to ground occurs for the first time, the output of the short-circuit-to-ground detection circuit is masked for a first period. When a short circuit to ground occurs for the second or any succeeding time, the output of the short-circuit-to-ground detection circuit is masked for a second period shorter than the first period.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: August 6, 2019
    Assignee: Rohm Co., Ltd.
    Inventor: Yukihiro Watanabe
  • Patent number: 10366979
    Abstract: An electrostatic discharge protection circuit is proposed comprising a series connection of a pull-up resistor and a trigger device, connecting a first and a second supply terminal. A coupling device is connected between the first and the second supply terminal, and further connected to the series connection so as to generate at an output a compensation voltage depending on a trigger voltage of the trigger device. A discharge device for discharging current from an electrostatic discharge event is connected between the first and second supply terminal and connected to the output of the coupling device, and operating in response to the compensation voltage.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: July 30, 2019
    Assignee: ams AG
    Inventor: Wolfgang Reinprecht
  • Patent number: 10361630
    Abstract: Systems and methods for a reconfigurable DC-DC converter are disclosed. In one embodiment, a system includes: a capacitor; a first switch circuit electrically coupled in parallel to the capacitor; a second switch circuit electrically coupled in parallel to the capacitor; and a control circuit electrically coupled to the first switch circuit and the second switch circuit to switch the switch circuits at one of at least two different frequencies to convert an input voltage to an output voltage, wherein the control circuit controls the first switch circuit and second switch circuit to operate in a plurality of modes to output a desired current range.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: July 23, 2019
    Assignee: VERILY LIFE SCIENCES LLC
    Inventor: Amirpouya Kavousian
  • Patent number: 10355609
    Abstract: In described examples of methods and control circuitry to control a multi-level power conversion system with a flying capacitor, a power circuit regulates a regulator input voltage signal to provide a supply voltage signal to the control circuitry. A power switching circuit couples the regulator input to a first terminal of the flying capacitor in response to a second terminal of the flying capacitor being coupled to a reference voltage node in a given switching cycle, and couples the regulator input to the second terminal in response to the first terminal being coupled to an input node of the power conversion system in the given switching cycle.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: July 16, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Orlando Lazaro, Kevin Scoones, Jeffrey Anthony Morroni, Alvaro Aguilar, Reza Sharifi
  • Patent number: 10355589
    Abstract: In a switching regulator, a first switch and a second switch are turned ON and OFF complementarily according to an output voltage. In a step-up/down mode, a third switch and a fourth switch are turned ON and OFF complementarily while the ON-duty D of the third switch is kept fixed.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: July 16, 2019
    Assignee: Rohm Co., Ltd.
    Inventors: Tetsuo Tateishi, Yuhei Yamaguchi, Shingo Hashiguchi, Kiyotaka Umemoto
  • Patent number: 10347410
    Abstract: A composite smoothing inductor that can respond to an increasing demand for downsizing, a higher driving frequency, and the like has a coupling transformer, a first smoothing inductor, a second smoothing inductor on a substrate in a concentrated manner. Two input terminals are connected to the coupling transformer. One output part of the coupling transformer is connected to the first smoothing inductor, and another output part of the coupling transformer is connected to the second smoothing inductor. The first smoothing inductor and second smoothing inductor are each connected to an output terminal. The mutual inductance of the coupling transformer is higher than the self-conductance of the first smoothing inductor and the self-conductance of the second smoothing inductor.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: July 9, 2019
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Mitsunao Fujimoto, Yukio Konno
  • Patent number: 10348199
    Abstract: A method and apparatus for controlling a step-down converter, including setting an on-state time (TON) to a default TON; switching, when an output voltage of the step-down converter falls below a reference output voltage, the step-down converter to an on-state for a duration of the TON; and switching, at the end of the TON, the step-down converter to an off-state for a minimum off-state time (TOFF).
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: July 9, 2019
    Assignee: Infineon Technologies AG
    Inventors: Matteo Agostinelli, Francesco Santoro
  • Patent number: 10340914
    Abstract: A power converting device and a method thereof are provided. The power converting device includes a filter circuit, a zero-crossing comparison circuit, a counting circuit, a logic circuit, an oscillation circuit, and a control circuit. The zero-crossing comparison circuit outputs a zero-crossing signal when an inductor current is equal to a zero current. The counting circuit counts a time interval between two consecutive time points at which the inductor currents are equal to the zero current in a low power mode. When the logic circuit determines that the time interval is greater than a first time threshold, the control circuit transmits a first oscillating signal to the filter circuit from the oscillation circuit; otherwise, it outputs a second oscillating signal; it outputs a pulse-skipping mode signal when the interval time is less than a second time threshold.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: July 2, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Tse-Hsu Wu, Yun-Chiang Chang, Fu-Chuan Chen
  • Patent number: 10338172
    Abstract: Embodiments of the invention provide a power device. The power device comprises a switch mode power conversion circuit with power semiconductors for driving a load in response to a control signal, a controller coupled to the switch mode power conversion circuit to generate the control signal based on a predetermined current profile to be provided to the load and a maximum junction temperature of the power semiconductors, and a current injector coupled to the switch mode power conversion circuit and the controller for generating an offset current. The switch mode power conversion circuit is controlled to output the predetermined current profile or an adjusted current profile in response to the control signal, and the adjusted current profile has an offset with respect to the predetermined current profile.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: July 2, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Yingfeng Lin
  • Patent number: 10320295
    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: February 17, 2018
    Date of Patent: June 11, 2019
    Assignee: Lion Semiconductor Inc.
    Inventors: John Crossley, Hanh-Phuc Le, Alberto Alessandro Angelo Puggelli
  • Patent number: 10320310
    Abstract: A power conversion device includes: a power conversion unit composed of a power conversion circuit having switching elements, an output current measurement unit, an output voltage measurement unit, and reactor; a voltage command generating unit for generating a voltage command; a dead time correction unit for calculating a dead time correction amount for correcting voltage error, between the voltage command and output voltage, caused due to dead time; and a PWM signal generating unit for generating switching signals according to the voltage command and the dead time correction amount, wherein the dead time correction unit calculates the dead time correction amount from the voltage command, the measured output voltage, and the measured output current.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: June 11, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takahiro Kato, Kikuo Izumi
  • Patent number: 10320292
    Abstract: A phase compensation circuit, being for compensating phase of a first voltage inputted to a PWM comparator of a DC/DC converter having a sleep mode, includes: a phase compensation resistor part including a resistor; a phase compensation capacitor part including a plurality of capacitors; and a switch group arranged to change over the capacitors, in the sleep mode, to a first connection state in which at least one of the capacitors is charged with a first bias voltage and to change over the capacitors, at cancellation of the sleep mode, to a second connection state in which the first voltage is set to a desired initial value.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: June 11, 2019
    Assignee: Rohm Co., Ltd.
    Inventors: Shun Fukushima, Shingo Hashiguchi, Tetsuo Tateishi
  • Patent number: 10291125
    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 for generating the output voltage, which is boosted from an input voltage. A feedforward module combines a slope compensation signal, the input voltage, and current information for an inductive energy storage element, which forms a boost circuit for generating the output voltage and generates a ramp signal to the modulation circuit. A duty cycle of the control signal is proportional to an impedance compensation input, inversely proportional to the slope compensation and the input voltage, and inversely proportional to the inductor current.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: May 14, 2019
    Assignee: Allegro MicroSystems, LLC
    Inventors: Pranav Raval, Vijay Mangtani
  • Patent number: 10277048
    Abstract: GaN-based half bridge power conversion circuits employ control, support and logic functions that are monolithically integrated on the same devices as the power transistors. In some embodiments a low side GaN device communicates through one or more level shift circuits with a high side GaN device. Both the high side and the low side devices may have one or more integrated control, support and logic functions. Some devices employ electro-static discharge circuits and features formed within the GaN-based devices to improve the reliability and performance of the half bridge power conversion circuits.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: April 30, 2019
    Assignee: Navitas Semiconductor, Inc.
    Inventors: Daniel Marvin Kinzer, Santosh Sharma, Ju Zhang
  • Patent number: 10270347
    Abstract: A short-circuit protected power supply circuit includes a switching power supply and a short-circuit sense/protection circuit. The switching power supply includes a synchronous rectifier, an output inductor, and an output capacitor. The synchronous rectifier is responsive to a synchronous rectifier control signal to selectively switch between an ON state and an OFF state. The output inductor and output capacitor are electrically connected in series with each other and are electrically connected in parallel with the synchronous rectifier. An output node is located between the output inductor and output capacitor. The short-circuit sense/protection circuit is coupled to the output node and is configured, upon a voltage magnitude at the output node being less than a predetermined voltage magnitude, to cause the synchronous rectifier control signal to switch the synchronous rectifier to, or keep it in, the OFF state.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: April 23, 2019
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Joseph Marotta, Paul Schwerman, Serdar Tevfik Sozusen
  • Patent number: 10263519
    Abstract: A booster for a digital circuit block provides speed and reliability at lower static power supply voltages, reducing overall power consumption of the circuits. The booster includes a transistor that couples a dynamic power supply node to a static power supply and is disabled in response to a boost clock. An inductor and capacitance, which may be the block power supply shunt capacitance, coupled to the dynamic power supply resonates so that the voltage of the dynamic power supply increases in magnitude to a value greater the static power supply voltage. A boost transistor is included in some embodiments to couple an edge of the clock to the dynamic power supply, increasing the voltage rise. Another aspect of the booster includes multiple boost transistors controlled by different boost clock phases so that the resonant boost circuit is successively stimulated to increase the amount of voltage rise.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: April 16, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Rajiv V. Joshi, Matthew M. Ziegler
  • Patent number: 10256728
    Abstract: An apparatus includes a plurality of pulse control circuits and a control circuit. A given pulse control circuit of the plurality of pulse control circuits may source a current pulse to the output power signal based on a comparison of a particular feedback signal of a plurality of feedback signals and a target voltage signal. The control circuit may offset a voltage level of each feedback signal of a first subset of the plurality of feedback signals. The first subset may exclude a first feedback signal. In response to a determination that a period of time has ended, the control circuit may offset a voltage level of each feedback signal of a second subset of the plurality of feedback signals. The second subset may include the first feedback signal and exclude a second feedback signal.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 9, 2019
    Assignee: Apple Inc.
    Inventors: Michael Couleur, Fabio Ongaro, Nikola Jovanovic, Frank Trautmann
  • Patent number: 10254314
    Abstract: A current sensing circuit used in a buck-boost converter having a pair of buck switches and a pair of boost switches, including: a first sensing circuit providing a detection current though a first normally-ON transistor and a second normally-ON transistor, and a second sensing circuit detecting an average of the detection current and providing a current sensing signal in accordance with the average. During a turn ON time of a first low side switch of the pair of buck switches, the detection current represents a current flowing through the first low side switch, the current sensing signal represents an output current. During a turn ON time of the second low side switch of the pair of boost switches, the detection current represents a current flowing through the second low side switch, and the current sensing signal represents an input current.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: April 9, 2019
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Lei Li
  • Patent number: 10250249
    Abstract: A circuit and method are provided for recuperating energy and decreasing driver power consumption in a switching converter. An inductor is directly connected between a gate driver and a gate electrode of a switch. A first burst pulse signal is generated, wherein energy from a power source is stored in the inductor and transferred to a parasitic capacitance of the switch. A driving pulse signal is subsequently generated to the gate electrode of the switch, wherein the gate voltage is equal to the supply voltage and no balancing current flows through the inductor. After the driving pulse signal is terminated a second burst pulse signal is generated, wherein energy is accumulated in the inductive element and returned to the power source. The energy provided from the power source during the first burst pulse signal is equal to the energy returned to the power source during the second burst pulse signal.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: April 2, 2019
    Assignee: Bel Power Solutions Inc.
    Inventors: Ivan Feno, Raphael Bernhard, Michal Sir
  • Patent number: 10250141
    Abstract: A buck-boost power converter and a control circuit for the buck-boost converter. The control circuit includes a buck cycle pulse width modulation module and a boost cycle pulse width modulation module respectively having a first controllable hysteresis and a second controllable hysteresis. The buck cycle pulse width modulation module can regulate the first controllable hysteresis during the buck-boost power converter transits between a buck mode and a buck-boost mode so as to eliminate or at least reduce sparks in an output voltage. The boost cycle pulse width modulation module can regulate the second controllable hysteresis during the buck-boost power converter transits between the buck-boost mode and a boost mode so as to eliminate or at least reduce sparks in the output voltage.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: April 2, 2019
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Jian Zhang
  • Patent number: 10243456
    Abstract: A voltage regulator includes first and second bias circuits, a transistor, and a load prediction circuit. The transistor has a first current electrode coupled to a first power supply voltage terminal, a second current electrode for providing a regulated output voltage, and a control electrode. The first biasing circuit is for providing a first bias voltage to the control electrode of the transistor in response to a feedback signal generated from the regulated output voltage. The second biasing circuit is for providing a second bias voltage to the control electrode of the transistor in response to a control signal. The load current prediction circuit is coupled to the second biasing circuit. The load prediction circuit is for providing the control signal to the second biasing circuit in response to determining that a load current at the second current electrode is expected to increase.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: March 26, 2019
    Assignee: NXP USA, Inc.
    Inventors: Marcos Mauricio Pelicia, Andre Luis Vilas Boas, Richard Titov Lara Saez
  • Patent number: 10236781
    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: June 19, 2018
    Date of Patent: March 19, 2019
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Isaac Y. Chen
  • Patent number: 10218366
    Abstract: A calibration circuit for synchronizing a switching regulator includes a phase locked loop circuit to generate one or more control signals based on an output of the switching regulator. A digital calibration circuit provides a digital output signal based on the control signals from the phase locked loop circuit. A timer can provide switching pulses to the switching regulator based on the digital output signal and the control signals. The phase locked loop circuit can adjust the control signals based on a reference clock signal to synchronize a feedback signal of the switching regulator with the reference clock signal.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: February 26, 2019
    Assignee: Linear Technology Holding LLC
    Inventor: Benjamin Thomas Voegeli
  • Patent number: 10210979
    Abstract: A circuit for driving an inductive load may include an input, an output, a first switch, and at least one capacitor. The first switch may cause the capacitor to be charged by the supply voltage via the inductive load. A device may discontinue the charging of the capacitor when the voltage has reached a predetermined level greater than that of the supply voltage. A first and a second diode may prevent the capacitor from discharging via the first switch and blocking inductive load current from entering the power supply, respectively. A second switch and the capacitor may be connected to the third switch to cause discharging of the capacitor via the third switch into the inductive load. Closing of the first switch may cause a current sufficient for actuating a mechanical valve to be induced in the inductive load.
    Type: Grant
    Filed: May 27, 2013
    Date of Patent: February 19, 2019
    Assignee: Electrolux Appliances Aktiebolag
    Inventors: Mats Olausson, Johan Waldeb├Ąck
  • Patent number: 10207351
    Abstract: A method and apparatus for providing welding type power is disclosed. A welding type power supply includes an input circuit, a controller and an output circuit. The input circuit receives an input power signal and provides an intermediate power signal. The output circuit receives the intermediate power signal and provides a welding type power output. The output circuit has an inverter with at least two inverter switches, and a clamp circuit that limits the voltage across the inverter. The clamp circuit captures and buffers the excess energy, and returns the excess energy to an input of the inverter over a plurality of switching cycles. The controller has control outputs connected to the input circuit and the output circuit, to control them.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 19, 2019
    Assignee: Illinois Tool Works Inc.
    Inventor: Andrew Joseph Henry
  • Patent number: 10194498
    Abstract: Power consumption in a start-up circuit for a LED-based light bulb may be reduced by digitally switching a transistor of the start-up circuit coupled to the input voltage. When the transistor is digitally switched between on and off, a reduced amount of power is dissipated by the transistor, because it may not enter a saturation region of operation where the resistance of the transistor between drain and source terminals increases. The transistor may be coupled to a voltage regulator for generating one or more output voltages, including a supply voltage for a host controller IC. The transistor may be switched on and off by a digital signal generated by logic circuitry, which may decide to switch the transistor on and off based on a voltage level at an output of the voltage regulator.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: January 29, 2019
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Erik J. Mentze, Karl Thompson
  • Patent number: 10193452
    Abstract: In one general aspect, a system can include an electromagnetic interference (EMI) filter, an alternating current (AC) rectifier bridge operatively coupled to the electromagnetic filter, the AC rectifier bridge providing a first voltage, a first power stage including a step-down transformer, the first power stage configured to receive the first voltage and output a second voltage, a second power stage configured to receive the second voltage and configured to convert the second voltage to a third voltage, and a power delivery adapter controller configured to receive at least one input indicative of a requested voltage value and configured to provide at least one output for use by the second power stage, the second power stage configured to determine a value for the third voltage based on the at least one output.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: January 29, 2019
    Assignee: GOOGLE LLC
    Inventors: Honggang Sheng, Choon Ping Chng
  • Patent number: 10181722
    Abstract: A single-inductor DC-DC converter generates two DC output voltages at two capacitors. The converter selectively transfers energy from a battery to the inductor or from the inductor to a selected capacitor. While the converter is still settling, the converter is regulated based on only the more deficient DC output voltage. After the converter has already settled, the converter is regulated based on the common-mode voltage for both DC output voltages. By regulating the still-settling converter based on only the more deficient DC output voltage, instead of the common-mode voltage, even greater deficiencies in that already more-deficient DC output voltage are avoided.
    Type: Grant
    Filed: September 4, 2016
    Date of Patent: January 15, 2019
    Assignee: NXP USA, INC.
    Inventors: Xiaowen Wu, Lei Tian, Yongqin Liang
  • Patent number: 10170988
    Abstract: An operation mode selection unit selects an operation mode of a power converter and generates a mode selection signal indicating the result of selection, in accordance with a load condition and a power supply condition. An operation mode switching control unit generates a mode control signal designating an operation mode of the power converter. When the operation mode currently selected by the mode control signal is different from an operation mode indicated by the mode selection signal, the operation mode switching control unit adjusts a power distribution ratio between a plurality of DC power supplies or an output voltage on an electric power line so as not to change abruptly, and then permits a transition of operation mode.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: January 1, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masanori Ishigaki, Shuji Tomura, Naoki Yanagizawa, Masaki Okamura
  • Patent number: 10170999
    Abstract: Systems and methods are provided for regulating a power conversion system. An example system controller includes: a signal generator configured to receive a converted signal and a first compensation signal and generate a second compensation signal based at least in part on the converted signal and the first compensation signal, the converted signal being associated with an input signal for a power conversion system; a modulation component configured to receive the second compensation signal and a ramping signal and generate a modulation signal based at least in part on the second compensation signal and the ramping signal; and a drive component configured to receive the modulation signal and output a drive signal based at least in part on the modulation signal to a switch to affect the first current, the drive signal being associated with an on-time period, the switch being closed during the on-time period.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: January 1, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Lieyi Fang, Jun Zhou, Qian Fang
  • Patent number: 10164514
    Abstract: Noise-free control circuit and control method for controlling a switching converter to avoid generating audile noises. The noise-free control circuit has a timer used to set a noise-free frequency threshed. When the switching frequency of the switching converter is decreased to the noise-free frequency threshold, the switching frequency of the switching converter is limited to the noise-free frequency threshold. The noise-free frequency threshold is higher than a maximum audible frequency of an audio noise.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: December 25, 2018
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Lei Li
  • Patent number: 10164536
    Abstract: A voltage conversion circuit and method, and a multiphase parallel power system, where in the voltage conversion circuit, a feedback circuit provides a frequency-controllable feedback ripple signal. Therefore, the voltage conversion circuit has a controllable operating frequency, and a frequency requirement of a load may be met. Compensation does not need to be performed in a hysteresis mode, and therefore the hysteresis mode has a fast-speed response. The operating frequency is fixed. Therefore, the voltage conversion circuit in the embodiments may be applied to the multiphase parallel power system such that the multiphase parallel power system is applicable to an application scenario with a large load current.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: December 25, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Chen Huang
  • 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