With Threshold Detection Patents (Class 323/284)
  • Patent number: 10790744
    Abstract: This disclosure describes techniques for controlling switching regulator switching operations. The techniques include generating, using an inductor, a plurality of output voltage signals from an input voltage by controlling one or more switches that vary charging operations of the inductor; generating a feedback control signal based on whether the plurality of output voltage signals are within a range of target values corresponding to the plurality of output voltage signals; selecting a second output voltage signal of the plurality of output voltage signals when the feedback control signal indicates that a first output voltage signal exceeds the range of a first target value of the target values that corresponds to the first output voltage signal; and controlling the one or more switches of the switching regulator based on a difference between the selected second output voltage signal and a second target value.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: September 29, 2020
    Assignee: Analog Devices International Unlimited Company
    Inventors: Danzhu Lu, Jie He, Suyi Yao
  • Patent number: 10784701
    Abstract: An electrical power system for regenerative loads may include a DC bus and an electrical actuator load, where back-driving the electrical actuator load generates regenerative electrical energy, and where the electrical actuator load is configured to transmit the regenerative electrical energy to the DC bus. The system may also include at least one additional load, where at least a portion of the regenerative electrical energy is transmitted to the at least one additional load.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: September 22, 2020
    Assignee: THE BOEING COMPANY
    Inventors: Eugene V. Solodovnik, Thomas F. Currier, Mark E. Liffring, Kamiar J. Karimi
  • Patent number: 10784780
    Abstract: A controller circuit for generating a Pulse-Width Modulation (PWM) signal for activating a switching device of a Switched-Mode Power Supply (SMPS) includes gap detection circuitry, Pulse Frequency Modulated (PFM) circuitry, PWM circuitry and logic circuitry. The gap detection circuitry is configured to generate a shift signal based on an indication of a voltage difference between a reference voltage and a feedback voltage corresponding to voltage output by the SMPS. The PFM circuitry is configured to generate a hold signal indicating a target PFM frequency for the PWM signal. The PWM circuitry is configured to shift, based on the shift signal, a pedestal current to generate a shifted pedestal current and to generate, based on the shifted pedestal current, a peak signal indicating a target PWM on time for the PWM signal.
    Type: Grant
    Filed: October 4, 2019
    Date of Patent: September 22, 2020
    Assignee: Infineon Technologies AG
    Inventors: Luca Scandola, Stefano Orlandi, Cristian Garbossa
  • Patent number: 10779375
    Abstract: A protection circuit for an LED driver and a DC/DC converter. The LED driver includes a DC/DC converter and a protection circuit. The DC/DC converter is used to convert the input voltage of the DC voltage input terminal into an output voltage, which comprises a high frequency switch and an inductor. The protection circuit comprises a detection module, a trigger module and a locking module. The detection module is coupled to the inductor for detecting the output voltage and outputting the voltage detection signal. The trigger module is used to receive the voltage detection signal and output a voltage trigger signal when the voltage detection signal is a negative voltage and the absolute value of the negative voltage is greater than or equal to the preset value. The locking module is coupled to the trigger module and stops the high frequency switch from operating after receiving the voltage trigger signal.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: September 15, 2020
    Assignee: CURRENT LIGHTING SOLUTIONS, LLC
    Inventor: Zhichao Liu
  • Patent number: 10778085
    Abstract: A power converter comprising a first capacitor, a flyback conversion module, a soft-start module, and a feedback control module. The flyback conversion module is coupled with the first capacitor and configured to receive a first control voltage across the first capacitor. The soft-start module is coupled with the first capacitor and is configured to charge the first capacitor during a startup stage, to increase the first control voltage to an expected voltage value at the end of the startup stage. The feedback control module is coupled with the flyback conversion module and is configured to control the flyback conversion module to output a substantially constant voltage or current after the startup stage. Wherein the expected voltage value is a value of the first control voltage when the flyback conversion module outputs a substantially constant voltage or current after the startup stage.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: September 15, 2020
    Assignee: CURRENT LIGHTING SOLUTIONS, LLC
    Inventors: Hongbin Wei, Qian Ni, Longyu Chen, Aling Li
  • Patent number: 10763701
    Abstract: A more efficient solution for a detection of operating conditions in an inductive power transfer system and for improved control of the inductive power transfer system. An operating condition at a secondary side of an inductive power transfer system is detected by measuring at least one electric variable at a primary side of the inductive power transfer system which is dynamically coupled to the operating condition at the secondary side of the inductive power transfer system. Then follows an analysis of the at least one electric variable over time at the primary side of the inductive power transfer system. This allows to detect a change of the operating condition at the secondary side of the inductive power transfer system. Also provided is a control method and related controller apparatus using the detection method.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: September 1, 2020
    Assignee: Wiferion GmbH
    Inventors: Benriah Goeldi, Johannes Tritschler
  • Patent number: 10756725
    Abstract: A load switch circuit implemented on an IC chip includes a first node for coupling to an input voltage, a second node for coupling to an external load, first and second capacitor nodes for coupling to first and second terminals of an external capacitor, and a first PFET coupled between the first node and the second node to control an output voltage to the external load. The load switch circuit also includes a driver circuit having a first NFET that has a drain coupled to the first node and a source coupled to a gate of the first PFET. A slew-rate-control circuit is coupled to a gate of the first NFET and includes the first capacitor node, which is coupled to the gate of the first NFET, and the second capacitor node, which is coupled to the second node.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: August 25, 2020
    Assignee: Texas Instruments Incorporated
    Inventor: Ricky Dale Jordanger
  • Patent number: 10757283
    Abstract: The information processing apparatus according to an embodiment of the present invention includes a power factor correction (PFC) circuit, an interface capable of connecting an optional device, and a power controller capable of turning off the PFC circuit. The power controller does not turn off the PFC circuit while a predetermined optional device is connected to the interface.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: August 25, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Minoru Hashimoto
  • Patent number: 10749486
    Abstract: The technology described in this document can be embodied in an audio power amplifier that includes a pair of switching devices, drive circuitry for driving the pair of switching devices to produce a signal, and an output filter to filter the signal from the pair of switching devices. The output filter is configured to provide the filtered signal to an audio load. The audio power amplifier includes a voltage feedback loop to provide a voltage of the filtered signal to a voltage controller of the audio power amplifier, and a current feedback loop to provide a current of the filtered signal to a current controller of the audio power amplifier.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: August 18, 2020
    Assignee: Bose Corporation
    Inventor: Zoran Coric
  • Patent number: 10742125
    Abstract: A direct feedback isolated power converter can include a transformer with primary, secondary, and bias windings. A main switch can selectively enable and disable current flow through the primary winding. A controller coupled to the bias winding may be configured to generate a gate drive signal for the main switch responsive at least in part to free ringing of the transformer. The controller may detect the free ringing via the bias winding. An auxiliary switch coupled across the secondary winding may be configured to selectively short circuit the secondary winding, responsive to feedback circuitry, to control when free ringing is established. The feedback circuitry may include a proportional, proportional integral, or proportional-integral-derivative control loop, a hysteretic control loop, or other controller type. The controller may operate at a variable or fixed frequency. The direct feedback isolated power converter may be a flyback converter or other type of isolated converter.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: August 11, 2020
    Assignee: Apple Inc.
    Inventor: Bogdan T. Bucheru
  • Patent number: 10739800
    Abstract: A power monitor circuit, includes a power delivery path including an input voltage, a first resistor, and a load. The power monitor circuit further includes a comparator to measure a voltage across the first resistor. The comparator includes an inverting input to measure a voltage on a first side of the first resistor, a non-inverting input to measure a voltage on a second side of the first resistor, a threshold input to receive a threshold input voltage level, and an output to generate a trip signal when the voltage across the first resistor meets the threshold input voltage input level. The power monitor circuit further includes a sub-circuit in series with the first resistor, the sub-circuit including a second resistor coupled to a Zener diode, the sub-circuit to feed the input voltage back into the inverting input of the comparator.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: August 11, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Robert G Mejia, Jim Jensen, Fernando Bolanos
  • Patent number: 10734799
    Abstract: Circuits, methods, and apparatus that may provide power supply voltages in a safe and reliable manner that meets safety and regulatory concerns and does not exceed physical limitations of cables and other circuits and components used to provide the power supply voltages. One example may provide a cable having a sufficient number of conductors to provide power without exceeding a maximum current density for the conductors. Another example may provide a cable having more than the sufficient number of conductors in order to provide an amount of redundancy. Current sense circuits may be included for one or more conductors. When an excess current is sensed, a power source in the power supply may be shut down, the power source may be disconnected from one or more conductors, or both events may occur.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: August 4, 2020
    Assignee: Apple Inc.
    Inventors: Paul J. Costa, Bharat K. Patel, Neal V. Cecil, Timur O. Starobinets, Ruenjou Lu, Dane Oleson, Fei Ni
  • Patent number: 10719096
    Abstract: A reference generator provides a reference output voltage that is continuously available while providing certain efficiencies of a duty-cycled voltage regulator. The reference output voltage is generated by a sample-and-hold circuit that is coupled to a voltage regulator. On command, the sample-and-hold circuit samples a low dropout voltage regulator that may be referenced by a bandgap circuit. During hold periods of the sample-and-hold circuit, the voltage regulator, in particular the bandgap circuit, may be disabled in order to conserve power. A sample cycle by the sample-and-hold circuit may be triggered by a signal received from a configurable finite state machine. The reference generator is effectively duty cycled in a manner that conserves available battery power, while still providing a constant reference output that is always available. The reference generator is especially suited for low-power, battery operated applications.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: July 21, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: James Murdock, Danielle Griffith, Per Torstein Roine
  • Patent number: 10707756
    Abstract: The invention provides a method for improving efficiency of a power converter which may include a switch coupled between a power source and a middle node, and may supply an inductor current at the middle node to result in an output voltage and a load current. The method may comprise: during an intermediate mode, controlling the inductor current to ripple with peaks at a peak current threshold and valleys which may vary as the load current varies.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: July 7, 2020
    Assignee: MEDIATEK INC.
    Inventors: Chao-Chang Chiu, Kuo-Chun Hsu
  • Patent number: 10707872
    Abstract: Circuits and techniques for buffering a digital signal are disclosed. The circuits and techniques allow a digital buffer circuit to accommodate a range of output voltages while maintaining a delay between input and output that is suitable for digital communications. The disclosed circuits and techniques utilize a combination of low voltage switches and high voltage switches. The low voltage switches dominate the buffering process when the buffer drives external circuitry (e.g., a communications bus) having a low voltage then, and the high voltage switches dominate the buffering process when the buffer drives external circuitry having a high voltage. The high voltage and low voltage switches configure themselves automatically based on an operating condition determined by the voltage level of the output with respect to the voltage level of the input.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: July 7, 2020
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Andrei Enache, Anca Mihaela Dragan, Adrian Macarie Tache
  • Patent number: 10694599
    Abstract: Systems and methods are provided for regulating one or more currents. An example system controller includes: a thermal detector configured to detect a temperature associated with the system controller and generate a thermal detection signal based at least in part on the detected temperature; and a modulation-and-driver component configured to receive the thermal detection signal and generate a drive signal based at least in part on the thermal detection signal to close or open a switch to affect a drive current associated with one or more light emitting diodes. The modulation-and-driver component is further configured to, in response to the detected temperature increasing from a first temperature threshold but remaining smaller than a second temperature threshold, generate the drive signal to keep the drive current at a first current magnitude, the second temperature threshold being higher than the first temperature threshold.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: June 23, 2020
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Xiangkun Zhai, Liqiang Zhu, Qiang Luo
  • Patent number: 10693302
    Abstract: A power supply has a multi-level DC-DC converter and a battery pack with two or more cells provided in series. The switching DC-DC converter provides a regulated voltage at an output. The converter has an energy storage element. The switching regulator is designed to selectively operate in two or more different modes. It switches between a first mode where one cell is connected (between battery and inductor of the converter), and the converter functions like a single cell buck converter and a second mode where two cells are connected in series and the converter functions like a two series cell buck converter. In general, any number of cells and modes can be provided, with successive cells being connected in series in each mode.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: June 23, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Holger Petersen
  • Patent number: 10686359
    Abstract: Systems and methods are provided for regulating a power conversion system. An example system controller includes a first controller terminal and a second controller terminal. The first controller terminal is configured to receive a first signal associated with an input signal for a primary winding of a power conversation system. The second controller terminal is configured to output a drive signal to a switch to affect a first current flowing through the primary winding of the power conversion system, the drive signal being associated with an on-time period, the switch being closed during the on-time period. The system controller is configured to adjust a duration of the on-time period based on at least information associated with the first signal.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: June 16, 2020
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Xiangkun Zhai, Yunchao Zhang, Jun Zhou, Lieyi Fang
  • Patent number: 10666142
    Abstract: In accordance with one embodiment, a switching converter includes a switching circuit configured to receive a switching signal and to alternatingly connect an output node of the switching circuit with a supply node and a reference node in accordance with the switching signal. An input voltage is operably applied between the supply node and the reference node. The switching converter further includes an inductor coupled between the output node of the switching circuit and an output node of the switching converter as well as an oscillator configured to generate a clock signal with an oscillator frequency depending on the input voltage. A switching controller is configured to receive the clock signal and to generate the switching signal using pulse-width modulation (PWM), wherein the frequency of the switching signal is set in accordance with the oscillator frequency and a duty cycle of the switching signal is deter-mined using current-mode control.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: May 26, 2020
    Assignee: Infineon Technologies AG
    Inventors: Marco Vanin, Cristian Garbossa, Stefano Orlandi, Winand Van Sloten
  • Patent number: 10663998
    Abstract: Various embodiments provide a voltage regulator circuit with automatic phase shedding. A control circuit may control first transitions of a power state of the voltage regulator based on an average current draw of the voltage regulator. The control circuit may further control second transitions of the power state of the voltage regulator based on a voltage droop of the output voltage and/or a peak current draw of the voltage regulator. The first transitions may be performed synchronously, and the second transitions may be performed asynchronously. Other embodiments may be described and claimed.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: May 26, 2020
    Assignee: Intel Corporation
    Inventors: Tamir Salus, Alexander Lyakhov, Alexander Gendler, Krishnakanth Sistla, Ankush Varma, Rachid Rayess, Nimrod Angel
  • Patent number: 10664001
    Abstract: A circuit includes a first transistor that conducts a first current responsive to a DC bias voltage and an RF signal. A second transistor conducts a second current responsive to the DC bias voltage. The first current and the second current are mirrored through a pair of current mirrors coupled together through a low-pass filter to filter the envelope of the RF signal.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: May 26, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Mohamed Abouzied, Rajagopalan Rangarajan, Peter Shah
  • Patent number: 10658052
    Abstract: Provided is a semiconductor device capable of adjusting an internal voltage after the internal voltage is raised. An internal voltage raising circuit of a flash memory includes: an internal voltage generation circuit for generating an internal voltage based on a power supply voltage supplied from outside; a determination circuit for comparing the internal voltage with a reference voltage and generating an enablement signal when detecting that the internal voltage is greater than the reference voltage; and an internal circuit operable in response to the enablement signal. In response to the generation of the enablement signal, the determination circuit lowers the reference voltage to increase a difference between the reference voltage and the internal voltage, and prevents the enablement signal from being disabled during subsequent trimming of the internal voltage.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: May 19, 2020
    Assignee: Winbond Electronics Corp.
    Inventor: Yuki Hosoe
  • Patent number: 10644597
    Abstract: A method includes switching a switching circuit of the switched-mode power supply in a synchronous mode by turning on and off switches of the switching circuit in synchrony with a clock signal, wherein the switching circuit is coupled to an inductive element, and wherein the synchronous mode comprises a charging phase and a discharging phase; switching the switching circuit in an asynchronous mode by turning on and off switches of the switching circuit without being synchronized with the clock signal, wherein the asynchronous mode comprises a charging phase and a discharging phase; charging the inductive element during the charging phase of the synchronous mode; discharging the inductive element during the discharging phase of the synchronous mode; charging the inductive element during the charging phase of the asynchronous mode; and discharging the inductive element during the discharging phase of the asynchronous mode.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: May 5, 2020
    Assignee: STMICROELECTRONICS (GRENOBLE 2) SAS
    Inventors: David Chesneau, Francois Amiard
  • Patent number: 10627884
    Abstract: To safely stop a system even when an abnormality occurs in a power supply for a control circuit, a semiconductor device includes a control circuit, a first power supply that outputs a first voltage to be supplied to the control circuit as a power-supply voltage, a first voltage monitoring circuit that determines whether the first voltage is abnormal, a first switch that is coupled to the first power supply and the control circuit, and cuts off supply of the first voltage to the control circuit when it is determined that the first voltage is abnormal, and a power-supply switching circuit that is coupled to the control circuit and a second power supply, which outputs a second voltage to be supplied to a circuit to which power supply is supplied other than the control circuit as a power-supply voltage, and supplies the second voltage to the control circuit in a state where the supply of the first voltage to the control circuit is cut off.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: April 21, 2020
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Masataka Motohashi, Yosuke Watanabe
  • Patent number: 10630175
    Abstract: A power supply circuit includes a regulation circuit that receives an input voltage and provides a regulated output voltage based on the input voltage. The regulation circuit includes a switch device having a switched output that generates a ripple current waveform in the current regulator to provide the regulated output voltage. A control circuit includes a pseudo current tracker (PCT) that is operatively coupled to the regulation circuit. The PCT receives a reference voltage and generates a ripple voltage waveform that is proportional to the ripple current waveform. The control circuit commands the switch device to generate the ripple current waveform based on the ripple voltage waveform such that the regulated output voltage approximates the reference voltage.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: April 21, 2020
    Assignee: Texas Instruments Incorporated
    Inventor: Isaac Cohen
  • Patent number: 10630279
    Abstract: An external detection terminal CIN1 is externally connectable outside a package and accepts a voltage signal proportionate to magnitude of a current in a second fixed-potential terminal. A first comparator circuit determines whether magnitude of the current in the second fixed-potential terminal indicated by the voltage signal from the external detection terminal is within a permissible range or beyond the permissible range. A second comparator circuit determines whether magnitude of a current in a sense terminal detected by using an internal detection terminal is within a permissible range or beyond the permissible range. A driving signal generator is prohibited from generating an ON signal as a driving signal if at least one of the first comparator circuit and the second comparator circuit determines that the current magnitude is beyond the permissible range.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: April 21, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuhiro Kawahara, Koichiro Noguchi
  • Patent number: 10622900
    Abstract: Architecture and design techniques for a single inductor multiple-output (SIMO) DC-DC converter are presented. The SIMO DC-DC converter is based on ordered-power-distributive-control (OPDC) scheme with several novel control mechanism to optimize the performance of the power delivery capability, conversion efficiency and voltage ripple. In addition to buck mode outputs, the new SIMO DC-DC converter can also have an output channel operating at auto-buck-boost mode for the input voltage varying with the usage time.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: April 14, 2020
    Assignee: BravoTek Electronics Co., Ltd.
    Inventors: Wei-Hsin Wei, Yi-Cheng Hsu, Wei-Lun Hsieh
  • Patent number: 10613124
    Abstract: The invention relates to an apparatus and method for tracking energy consumption. An energy tracking system comprises at least one switching element, at least one inductor and a control block to keep the output voltage at a pre-selected level. The switching elements are configured to apply the source of energy to the inductors. The control block compares the output voltage of the energy tracking system to a reference value and controls the switching of the switched elements in order to transfer energy for the primary voltage into a secondary voltage at the output of the energy tracking system. The electronic device further comprises an ON-time and OFF-time generator and an accumulator wherein the control block is coupled to receive a signal from the ON-time and OFF-time generator and generates switching signals for the at least one switching element in the form of ON-time pulses with a constant ON-time.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: April 7, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Horst Diewald, Johann Zipperer, Peter Weber, Anton Brauchle
  • Patent number: 10601317
    Abstract: A device includes a first circuit and a second circuit. The first circuit receives a first voltage, at a first input, and provides a second voltage having one of a first level and a second level based on a level of the first voltage being above or below a threshold voltage. The second circuit is electrically coupled to the first input of the first circuit and decreases the level of the first voltage below a threshold voltage on a condition that the level of the first voltage is above the threshold voltage for a maximum time.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: March 24, 2020
    Assignee: Lumileds Holding B.V.
    Inventor: Zhihua Song
  • Patent number: 10599172
    Abstract: There is to provide a power circuit capable of stabilizing an internal power source voltage and assuring a normal operation of a load circuit. According to one embodiment, the power circuit includes a regulator which generates an output voltage using an entered input voltage, a voltage detecting circuit which detects the output voltage, and a clamp circuit which outputs an internal power source voltage based on the output voltage and in a first failure that the output voltage is larger than a predetermined first voltage, outputs the internal power source voltage suppressed to the first voltage and less, in which the clamp circuit outputs the internal power source voltage to the logic circuit which operates with the internal power source voltage of the first voltage and less and the voltage detecting circuit outputs the first failure to the logic circuit when detecting the first failure.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: March 24, 2020
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Kentaro Hayashi, Yutaka Hayashi
  • Patent number: 10558231
    Abstract: A voltage regulator includes an operational amplifier that compares a feedback voltage that is proportional to an output voltage and a predetermined reference voltage that corresponds to a desired output voltage. The operational amplifier controls the conduction state of an output transistor according to the comparison. A detecting circuit monitors the operating state of the operational amplifier, and in the case that the operational amplifier is not operating, outputs a signal which causes the output transistor to be placed in a non-conductive state.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: February 11, 2020
    Assignee: Toshiba Memory Corporation
    Inventor: Masayuki Usuda
  • Patent number: 10547240
    Abstract: A power converter includes an input node that receives an input voltage and a control loop that regulates an output voltage of the power converter. The power converter also includes a comparison voltage generation circuit that generates a comparison voltage based on an operating point of the power converter. The power converter also includes a first comparator that compares a control loop voltage in the control loop with the comparison voltage and generates a control signal. The power converter also includes a mode control circuit that transitions the power converter from the low power operating mode to a first operating mode using the control signal. The output voltage is regulated in both the first operating mode and the low power operating mode.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: January 28, 2020
    Assignee: Silanna Asia Pte Ltd
    Inventor: Barry S. Arbetter
  • Patent number: 10536084
    Abstract: The power supply apparatus, when a switching element is driven at a second frequency lower than a first frequency, determines a duty of a pulse signal according to a predetermined voltage so that a frequency of the pulse signal input to a feedback unit is equal to or more than a predetermined frequency.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: January 14, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Junya Kobayashi, Yasuhiro Shimura, Jun Kawakatsu
  • Patent number: 10523111
    Abstract: A device for overvoltage protection includes a gate driver module and an overvoltage protection module. The gate driver module is configured to selectively activate a switching element to provide input power to a primary side winding of a transformer for generating a target output at a secondary side winding of the transformer. The overvoltage protection module is configured to determine a transition threshold based on a previously sensed supply voltage at a voltage supply pin configured to receive power for operating the circuit from a primary side auxiliary winding of the transformer and determine the circuit is operating in an overvoltage condition when a current supply voltage at the voltage supply pin exceeds the transition threshold, wherein the current supply voltage occurs at the supply pin after the previously sensed supply voltage.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: December 31, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Tiam Poh Lau, Marcus Schaemann
  • Patent number: 10523123
    Abstract: A multi-phase synchronous converter consisting of a plurality of half bridges which in turn consist of an upper power switch and a lower power switch, the converter being actuated by a pulse width modulation dependent on a predetermined pulse duty cycle in the range of zero to one hundred percent. The multi-phase synchronous converter generates an output current and is operated in a normal mode in which the power switches switch with a normal switching period defined by a predetermined normal switching frequency, and a normal pulse duration dependent on the actual pulse duty cycle. As soon as the pulse duty cycle exceeds an upper duty cycle threshold or falls below a lower duty cycle threshold, the multi-phase synchronous converter is switched from the normal mode into an operating mode in which at least one of the power switches of at least one half bridge is deactivated.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: December 31, 2019
    Assignee: AVL LIST GmbH
    Inventors: Tomas Perpetuo Correa, Roland Greul, Oliver König
  • Patent number: 10505452
    Abstract: A frequency control circuit, applied in a switching converter, can be configured to: regulate an off time of a power transistor of the switching converter in one switching cycle according to an on time of the power transistor, or regulate the on time of the power transistor in one switching cycle according to the off time of the power transistor; and maintain an operating frequency of the switching converter to be within a predetermined range.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: December 10, 2019
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Hao Chen, Le Li, Xinlei Li
  • Patent number: 10505451
    Abstract: A system and method are provided for controlling a modified buck converter circuit. A pull-up switching mechanism that is coupled to an upstream terminal of an inductor within a modified buck converter circuit is enabled. A load current at the output of the modified buck regulator circuit is measured. A capacitor current associated with a capacitor that is coupled to a downstream terminal of the inductor is continuously sensed and the pull-up switching mechanism is disabled when the capacitor current is greater than a sum of the load current and an enabling current value.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: December 10, 2019
    Assignee: NVIDIA Corporation
    Inventors: Sudhir Shrikantha Kudva, William J. Dally, Thomas Hastings Greer, III, Carl Thomas Gray
  • Patent number: 10499469
    Abstract: A strobe apparatus includes: a light-emitting semiconductor module; a current sense resistor connected in series to the light-emitting semiconductor module and adapted to sense a drive current flowing through the light-emitting semiconductor module to generate a sense voltage; a step-up voltage converter connected to the light-emitting semiconductor module and the current resistor and adapted to supply the drive current to the light-emitting semiconductor module and the current resistor; and a voltage converter controlling unit connected to the step-up voltage converter and the current sense resistor, and adapted to control the step-up voltage converter in accordance with a difference between the sense voltage and an input voltage, so that the drive current has a first level current followed by a second level current larger than the first level current.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: December 3, 2019
    Assignee: STANLEY ELECTRIC CO., LTD.
    Inventor: Keizo Sekido
  • Patent number: 10491108
    Abstract: A power converter and a method of operation thereof is disclosed including an input, an output, a sensor unit, a switched power converter, and a processor module. The power converter may convert an input power into an output power. The power converter may sense real-time measurements of the input power and the output power to determine a real-time calculated efficiency. The power converter may chop the input power into sized and positioned portions of the input power based on a plurality of determined operating parameters. The power converter may determine the operating parameters based on the real-time calculated efficiency and on a plurality of other operating factors/conditions.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: November 26, 2019
    Assignee: Volpe and Koenig, P.C.
    Inventor: Eran Ofek
  • Patent number: 10488443
    Abstract: The invention relates to an apparatus and method for tracking energy consumption. An energy tracking system comprises at least one switching element, at least one inductor and a control block to keep the output voltage at a pre-selected level. The switching elements are configured to apply the source of energy to the inductors. The control block compares the output voltage of the energy tracking system to a reference value and controls the switching of the switched elements in order to transfer energy for the primary voltage into a secondary voltage at the output of the energy tracking system. The electronic device further comprises an ON-time and OFF-time generator and an accumulator wherein the control block is coupled to receive a signal from the ON-time and OFF-time generator and generates switching signals for the at least one switching element in the form of ON-time pulses with a constant width ON-time.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: November 26, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Horst Diewald, Johann Zipperer, Peter Weber, Anton Brauchle
  • Patent number: 10483855
    Abstract: A circuit comprises an Inductor-Inductor-Capacitor (LLC) tank circuit and an energizing circuit. The LLC tank circuit includes first and second inductors, a capacitor, and a primary coil of a transformer. The first inductor is coupled in series with the second inductor, the second inductor is coupled in series with the capacitor, and the primary coil is coupled in parallel with the second inductor. The energizing circuit supplies power to the LLC tank circuit according to a switching period, and detects a power limit condition according to a value of an integrated current sense signal and a duration of the switching period. The integrated current sense signal corresponds to an integration over time of a current supplied to the LLC tank circuit. The circuit may be incorporated into a power converter to provide power limit detection according to an accurate real-time estimation of the power converter's output power.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: November 19, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: SangCheol Moon, Hangseok Choi, Jintae Kim
  • Patent number: 10483849
    Abstract: A method for transitioning between Pulse Frequency Modulation (PFM) mode and Pulse Width Modulation (PWM) mode and vice versa, in a switching regulator is disclosed. In PFM mode, load current is estimated based on slope of waveform of the output voltage of the switching regulator. If the load current is greater than an upper threshold, then the switching regulator is set to PWM mode. In PWM mode, load current is estimated using duration of dead-time. If the duration of dead-time is higher than a pulse filter trip point, the switching regulator temporarily transitions to PFM mode. The load current is further estimated based on slope of the waveform of the output voltage and, if the load current is lower than a lower threshold, the switching regulator remains in PFM mode. If the load current is higher than the lower threshold, the switching regulator transitions back into PWM mode.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: November 19, 2019
    Assignee: CIREL SYSTEMS PRIVATE LIMITED
    Inventors: Anzal Saleem, Leela Madhav Lakkimsetti, Rinu Mathew
  • Patent number: 10468405
    Abstract: An electric circuit includes a semiconductor device. The semiconductor device includes a first transistor and a second transistor in a common semiconductor substrate. The first transistor is of the same conductivity type as the second transistor. A first source region of the first transistor is electrically connected to a first source terminal via a first main surface of the semiconductor substrate. A second drain region of the second transistor is electrically connected to a second drain terminal via a first main surface of the semiconductor substrate. A first drain region of the first transistor and a second source region of the second transistor are electrically connected to an output terminal via a second main surface of the semiconductor substrate. The electric circuit further includes a control circuit operable to control a first gate electrode of the first transistor and a second gate electrode of the second transistor.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: November 5, 2019
    Assignee: Infineon Technologies AG
    Inventors: Rainald Sander, Till Schloesser
  • Patent number: 10468987
    Abstract: Timing circuitry causes: a first closed signal on a first switch control output before a signal on a second switch control output changes from a second closed signal to a first open signal; the first switch control output to provide a second open signal after a first selected time after the second switch control output changes from the second closed signal to the first open signal; and a third switch control output to provide a third closed signal a second selected time after the first switch control output changes from the first closed signal to a third open signal. A beginning of the first closed signal to a beginning of the first open signal is based on a later of: a current through a switch connected to the second switch control output exceeding a threshold current; and a clocked time after the beginning of the first closed signal.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: November 5, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Thomas Matthew LaBella, Michael G. Amaro, Jeffrey Anthony Morroni
  • Patent number: 10418901
    Abstract: The present invention relates to a new method of power converter regulation, in particular regulation of very high frequency (VHF) power converters operating at frequencies in the MHz range, wherein accurate output regulation utilizes inherent delays in the regulation loop, whereby, contrary to hysteresis on/off control, the new method does not require immediate responses to comparisons of a sense voltage to two reference voltages; rather, according to the new method, only one reference voltage is used, and delays in the feedback loop are allowed to cause some variation of an output of the power converter.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: September 17, 2019
    Assignee: Danmarks Tekniske Universitet
    Inventors: Milovan Kovacevic, Mickey P. Madsen
  • Patent number: 10404169
    Abstract: The invention proposes a system and method for extending the maximum duty cycle of a step-down switching converter to nearly 100% while maintaining a constant switching frequency. The system includes a voltage mode or current mode step-down converter driven by a leading edge blanking (LEB) signal, which operates at the desired switching frequency. More particularly, the LEB signal is connected to a slope generator and/or a current sense network. In each switching cycle, the LEB signal forces the slope signal and/or current sense signal to reset, thereby achieving a constant switching frequency. Corresponding methods for how to extend the maximum duty cycle of a step-down switching converter while maintaining a constant frequency are also disclosed.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: September 3, 2019
    Assignee: ALPHA AND OMEGA SEMICONDUCTOR INCORPORATED
    Inventor: Youngbok Kim
  • Patent number: 10404158
    Abstract: A PFC module is disclosed and contains an actively clocked PFC circuit (104) comprising at least one controlled switch (S1), and an integrated circuit (103) as a control unit which controls during a half-wave of the input voltage(Vin)of the actively clocked PFC circuit (104) the at least one switch(S1) of the actively clocked PFC circuit (104) with a fixed operating frequency in discontinuous current mode(DCM) The integrated circuit (103) sets the switch-on time (ton) of the at least, one switch (S1)dependent on the amplitude of the input voltage (VIN) of the actively clocked. PFC circuit (104), and keeps constant the switch-on time (ton) for at least two consecutive switching cycles within the half-wave of the input voltage (VIN), Also disclosed are a system containing the PFC module and a method for operating the PFC module.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: September 3, 2019
    Assignee: Tridonic GmbH & Co KG
    Inventors: Günter Marent, Thomas Ondrisek
  • Patent number: 10404217
    Abstract: Apparatus and methods for reducing inductor ringing of a voltage converter are provided. In certain configurations, a voltage converter includes an inductor connected between a first node and a second node, a plurality of switches, and a bypass circuit having an activated state and a deactivated state. The switches includes a first switch connected between a battery voltage and the first node, a second switch connected between the first node and a ground voltage, a third switch connected between the second node and the ground voltage, and a fourth switch connected between the second node and the output. The bypass circuit includes a first pair of transistors connected between the first node and the second node and configured to turn on to bypass the inductor in the activated state and to turn off in the deactivated state.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: September 3, 2019
    Assignees: Skyworks Solutions, Inc., SnapTrack, Inc.
    Inventors: Peter Harris Robert Popplewell, Jakub F. Pingot, Florinel G. Balteanu, Martin Wilson, Mark Tuckwell
  • Patent number: 10394260
    Abstract: Systems and methods according to one or more embodiments are provided for gate boosted drivers for integrated power stages. In one example, a gate driver includes an output stage comprising an n-channel metal-oxide-semiconductor (NMOS) pull-up transistor and an NMOS pull-down transistor, where the NMOS pull-up transistor and the NMOS pull-down transistor are coupled at an output node. The gate driver further includes a bootstrap circuit comprising a main bootstrap capacitor, where the bootstrap capacitor provides a supply voltage for driving the NMOS pull-up transistor. The gate driver further includes a high voltage generator coupled with the main bootstrap capacitor via a transistor switch and a replica bootstrap circuit comprising a replica bootstrap capacitor. The replica bootstrap circuit generates a reference voltage that regulates a drain current of the transistor switch, and the regulated drain current of the transistor switch charges the main bootstrap capacitor from the high voltage generator.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: August 27, 2019
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Dan Shen, Lorenzo Crespi
  • Patent number: 10371723
    Abstract: A current sensor for biomedical measurements includes: a first amplifier; a first capacitor; a second capacitor; a first switch connected in parallel with the first capacitor; a second switch connected in parallel with the second capacitor; a second amplifier; a third capacitor; a resistor; and a switched capacitor network. The first capacitor and the second capacitor are connected in series and across a first input and output of the first amplifier. The third capacitor and the resistor are respectively connected across a first input and output of the second amplifier. The switched capacitor network is connected between the output of the first amplifier and the first input of the second amplifier.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: August 6, 2019
    Assignee: SHENZHEN DANSHA TECHNOLOGY CO., LTD.
    Inventor: Juanping Yuan