Single-ended, Separately-driven Type Patents (Class 363/20)
  • Patent number: 11228241
    Abstract: The present disclosure provides a control method of a voltage conversion circuit. The voltage conversion circuit includes a DC voltage input terminal, a primary side switch unit, a resonant inductance, a transformer, a secondary side switch unit and a DC voltage output terminal which are electrically coupled. The resonant inductance is connected to the transformer in series. The voltage conversion circuit also includes a resonant capacitance which resonates with the resonant inductance. The control method includes: controlling switch elements in the primary side switch unit and the secondary side switch unit, so that a range of a ratio Ton/Tr of a total conduction time Ton to a resonant period Tr of the voltage conversion circuit is (0, 1.8)U(2.7, 3.7)U(4.8, 5.5), and a quality factor Q of the voltage conversion circuit is less than or equal to 5, that is, Q?5.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: January 18, 2022
    Assignee: Delta Electronics (Shanghai) CO., LTD
    Inventors: Yiqing Ye, Yuan Zhou
  • Patent number: 11223229
    Abstract: Disclosed is an uninterruptible power supply system comprising an energy storage system (ESS). The uninterruptible power supply system comprises an ESS and is connected to a grid, and further comprises: a first converter for converting an alternating current voltage of the grid into a direct current voltage; a second converter connected in series to the first converter, for converting the direct current voltage outputted from the first converter into an alternating current voltage and transferring same to a load; the ESS comprising a battery connected to a node between the first and second converter, for performing charging and discharging; and a PLC for receiving the operation statuses of the first and second converters, and on the basis thereof, controlling the operation of the uninterruptible power supply system, wherein the PLC determines the operation mode of the ESS by using the received operation statuses of the first and second converters.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: January 11, 2022
    Assignee: LSIS CO., LTD.
    Inventors: Ji-Heon Lee, Dong-Jin Yun, Ji-Hong Kim, Yun-Jae Lee, Min-Jae Kim
  • Patent number: 11190106
    Abstract: Systems and methods for voltage compensation based on load conditions in power converters. For example, a system controller for regulating a power converter includes a first controller terminal; a second controller terminal; and a compensation current generator. The compensation current generator is configured to receive an input signal through the first controller terminal. The input signal indicates a first current flowing through a primary winding of a power converter. The compensation current generator is configured to receive a demagnetization signal related to a demagnetization period of the power converter and associated with an auxiliary winding of the power converter. The compensation current generator is configured to generate a compensation current based at least in part on the input signal and the demagnetization signal. The compensation current generator is connected to a resistor. The resistor is configured to generate a compensation voltage based at least in part on the compensation current.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: November 30, 2021
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Wuping Lin, Yunchao Zhang, Jianfeng Huang, Lieyi Fang
  • Patent number: 11031876
    Abstract: An energy recycle circuit for a flyback circuit and method thereof. The energy recycle circuit has an auxiliary switch coupled in series to a clamp capacitor to form a branch, and the branch is coupled in parallel with the primary winding, or with the primary switch. The energy recycle circuit further has a recycle control circuit to generate an auxiliary switching signal. The auxiliary switch is turned on during a charging process of the clamp capacitor, and is turned off at an end of an immediate subsequent discharging process of the clamp capacitor. The charging process of the clamp capacitor is timed at a first length of time, and the immediate subsequent discharging process of the clamp capacitor is timed at a second length of time, based on an auxiliary switch current signal. The second length of time is adjustable to have an equal time length with the first length of time, or have a unequal time length with the first length of time.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: June 8, 2021
    Assignee: Monolithic Power Systems, Inc.
    Inventor: Yancun Li
  • Patent number: 11005383
    Abstract: A switching power supply device includes a switching circuit including first switching elements, a rectification circuit including second switching elements, a smoothing circuit, and a controller. The controller performs switching between synchronous rectification control for driving the second switching elements and in synchronization with the switching circuit and asynchronous rectification control for driving the second switching elements independently of the switching circuit, and performs feedback control based on a normal duty on the first switching elements and the second switching elements. When the synchronous rectification control is switched to the asynchronous rectification control, the controller replaces the normal duty with a switching duty different from the normal duty and performs feedback control by the normal duty after the synchronous rectification control is switched to the asynchronous rectification control.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: May 11, 2021
    Assignee: YAZAKI CORPORATION
    Inventor: Yoshihiro Yamasaki
  • Patent number: 10996249
    Abstract: A backup battery charging system for a building management system is disclosed. Components of the charging system include an analog power converter, a voltage feedback loop and a current feedback loop. The feedback loops each include at least one digital resistor. The system panel, in turn, includes at least one microcontroller that controls the building management system and also controls the charging system. The charging system is “software defined,” in that the microcontroller controls the charging system by updating the digital resistors in the feedback loops to control the analog power converter. In one example, the building management system is a fire alarm system controlled by a fire control panel as the system panel.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: May 4, 2021
    Assignee: Johnson Controls Fire Protection LP
    Inventors: Daniel P. Cianfrocco, Alexandre Gouin
  • Patent number: 10992154
    Abstract: A system for supplying adapted power to an electronic device with a reduced level of power consumption when the device is not in use includes a first power supplying module, a control module coupled to the first power supplying module, and an MCU coupled to the control module and coupled to the electronic device. The MCU is configured to switch on the first power supplying module when the first power supplying module is in a normal state, the normal state being an AC power supply coupled to the first power supplying module. The MCU detects an instant mode of the electronic device and outputs a first signal to the control module when the electronic device is in a standby mode. The control module is configured to switch off the first power supplying module when the first signal is received. A power supplying method is further provided.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: April 27, 2021
    Assignee: NANNING FUGUI PRECISION INDUSTRIAL CO., LTD.
    Inventor: Chi-Jung Lee
  • Patent number: 10903749
    Abstract: The flyback converter generally has a capacitive divider operatively connectable to a voltage source for receiving an input voltage, the capacitive divider having a plurality of capacitive devices connected in series from one another; a transformer having a plurality of primary windings inductively coupled to at least one secondary winding, each one of the primary windings of the transformer being connected in parallel to a corresponding one of the capacitive devices of the capacitive divider via a switching device, each of the at least one secondary winding being connected to a forwardly biased and capacitive circuit connectable to an output load; and a controller connected to each one of the switching devices for operating the flyback converter to power the output load with the voltage source.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: January 26, 2021
    Assignee: Appulse Power Inc.
    Inventors: Sheikh Mohammad Ahsanuzzaman, Seyed-Behzad Mahdavikhah-Mehrabad, Aleksandar Radic, Aleksandar Prodic
  • Patent number: 10892316
    Abstract: A circuit package is provided that includes a substrate having a first side and a second side, an integrated circuit component coupled to the second side of the substrate, and a ball grid array formed on the first side of the substrate, the ball grid array including multiple contact balls arranged in a pattern. Each of a first subset of the contact balls is electrically coupled to a first voltage input of an integrated circuit component, and each of a second subset of the contact balls is electrically coupled to a second voltage input of the integrated circuit component. The package also includes a capacitor mounted to the first side and having a first terminal coupled to a first contact ball in the first subset of the contact balls and a second terminal coupled to a second contact ball in the second subset of the contact balls.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: January 12, 2021
    Assignee: Google LLC
    Inventor: Scott Kirkman
  • Patent number: 10832861
    Abstract: An electromagnetic connector is disclosed that is configured to form a first magnetic circuit portion comprising a first core member and a first coil disposed of the first core member. The electromagnetic connector is configured to mate with a second electromagnetic connector, where the second electromagnetic connector is configured to form a second magnetic circuit portion comprising a second core member and a second coil disposed of the second core member. The first core member and the second core member are configured to couple the first coil to the second coil with a magnetic circuit formed from the first magnetic circuit portion and the second magnetic circuit portion when the electromagnetic connector is mated with the second electromagnetic connector. The magnetic circuit is configured to induce a signal in the first coil when the second coil is energized.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: November 10, 2020
    Assignee: BEDROCK AUTOMATION PLATFORMS INC.
    Inventors: Albert Rooyakkers, James G. Calvin
  • Patent number: 10763756
    Abstract: A resonant converter includes a resonant transformer having a leakage inductance and a magnetizing inductance coupled in series to form a resonant transformer input port. The resonant transformer has an output that is coupled to provide an output power to a load. A primary bridge circuit is coupled to provide an input power to the resonant transformer input port. A buffer circuit is coupled in parallel with the resonant transformer input port. A control module is coupled to receive a buffered primary port signal from the buffer circuit to control the primary bridge circuit to control the output power to the load in response to the buffered primary port signal.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: September 1, 2020
    Assignee: Power Integrations, Inc.
    Inventors: Robert J. Mayell, Hartley Fred Horwitz, Frank Joseph Schulz, Roger Colbeck
  • Patent number: 10756721
    Abstract: A method of protecting a gate driver circuit includes receiving an input signal to energize a gate driver output of the gate driver circuit, determining that an abnormal operating condition exists at the gate driver output, continuously energizing the gate driver output for a time period, and entering a pulsed mode of operation for energizing the gate driver output after the time period has lapsed.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: August 25, 2020
    Assignee: Infineon Technologies AG
    Inventor: Tommaso Bacigalupo
  • Patent number: 10734908
    Abstract: A synchronous rectifier control circuit includes a drain voltage input, a gate voltage output, a gate voltage generation circuit, a burst detection circuit, an on-time monitor circuit, and a burst mode reset circuit. The gate voltage generation circuit includes a first input coupled to the drain voltage input, and an output coupled to the gate voltage output. The burst detection circuit includes a first input coupled to the drain voltage input, and an output coupled to a second input of the gate voltage generation circuit. The on-time monitor circuit includes an input coupled to the output of the gate voltage generation circuit. The burst mode reset circuit includes a first input coupled to the drain voltage input, a second input coupled to an output of the on-time monitor circuit, and an output coupled to a second input of the burst detection circuit.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: August 4, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Bharath Kannan, Bing Lu
  • Patent number: 10715028
    Abstract: A ZVS (zero voltage switching) control circuit for controlling a flyback power converter includes: a primary side controller circuit for generating a switching signal, to control a primary side switch; and a secondary side controller circuit for generating a synchronous rectifier (SR) control signal for controlling a synchronous rectifier switch. The SR control signal includes an SR-control pulse and a ZVS pulse. The SR-control pulse controls the synchronous rectifier switch to perform secondary side synchronous rectification. The secondary side controller circuit determines a trigger timing point of the ZVS pulse according to a waveform characteristic of a ringing signal, to control the synchronous rectifier switch to be ON for a predetermined period, thereby achieving zero voltage switching of the primary side switch. The primary side or the secondary side controller circuit includes a jitter controller for performing jitter control on the ZVS pulse.
    Type: Grant
    Filed: September 28, 2019
    Date of Patent: July 14, 2020
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Tzu-Chen Lin, Kun-Yu Lin, Li-Di Lo, Wei-Hsu Chang
  • Patent number: 10692649
    Abstract: A switching power supply device which includes an input filter capacitor and a switching device, includes: a transformer comprising a core of the transformer and a first input winding, the first input winding being wound around the core of the transformer, connected between one terminal of the input filter capacitor and one terminal of the switching device; a first capacitive unit connected between both terminals of the first attenuation winding part of the transformer, and including at least one device including a first capacitor; and a clamp unit configured to limit a peak voltage generated by the first input winding when the switching device is turned off during the switching operation of the switching device, the clamp unit including a rectification diode.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: June 23, 2020
    Inventor: Chan Woong Park
  • Patent number: 10686491
    Abstract: A method of estimating a noise present on a 2-wire line connected to a modem using a plurality of frequency bands is implemented by a noise estimation device connected to the 2-wire line. The method comprises obtaining a first voltage value of a differential mode voltage at the two wires of the secondary side of the differential mode circuit, the first voltage value measured on the plurality of frequency bands and a second voltage value of a common mode image voltage corresponding to a voltage at the two wires of the secondary side of the common mode circuit, resulting from said differential mode voltage, the second voltage value being measured on the plurality of frequency bands and transmitting the first voltage value and the second voltage value to a calculating module configured to provide a noise estimate based on the first and second voltage values.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: June 16, 2020
    Assignee: Orange
    Inventors: Rabah Tarafi, Fabienne Moulin, Alain Cario
  • Patent number: 10673342
    Abstract: An active clamp circuit for a power converter having a transformer includes a switch having a drain node, a gate node, and a source node, the drain node configured to be connected to a first terminal of a primary winding of the transformer, a capacitor having a first terminal connected to the source node, and a second terminal to be connected to a second terminal of the primary winding, a gate driver coupled to the gate node to control the switch and having a high-side input node and a low-side input node, the low-side input node being coupled to the first terminal of the capacitor, and a voltage regulator to: i) receive an input voltage from the second terminal of the capacitor, and ii) provide a regulated voltage to the high-side input node using the input voltage and being of a sufficient voltage level to control the switch.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: June 2, 2020
    Assignee: Silanna Asia Pte Ltd
    Inventor: Ren Huei Tzeng
  • Patent number: 10666152
    Abstract: A switching power converter is provided with a phase-shifting RC network for phase-shifting a divided version of a drain voltage of a power switch transistor into a phase-shifted voltage. A comparator compares the phase-shifted voltage to a DC bias voltage to detect peaks and valleys during resonant oscillations of the drain voltage of the power switch transistor.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: May 26, 2020
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Henry Jun, Chuanyang Wang
  • Patent number: 10644589
    Abstract: A distributed power system wherein a plurality of power converters are connected in parallel and share the power conversion load according to a prescribed function, but each power converter autonomously determines its share of power conversion. Each power converter operates according to its own power conversion formula/function, such that overall the parallel-connected converters share the power conversion load in a predetermined manner.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: May 5, 2020
    Assignee: Solaredge Technologies Ltd.
    Inventors: Meir Adest, Guy Sella, Lior Handelsman, Yoav Galin, Amir Fishelov, Meir Gazit, Tzachi Glovinski, Yaron Binder
  • Patent number: 10638566
    Abstract: The present disclosure discloses a light-emitting diode (LED) driver comprising a controller and a main circuit. The controller is configured to receive a dimming signal for dimming an LED load and use a current hysteresis control to generate a control signal, wherein a hysteresis width of the current hysteresis control varies with the dimming signal. The main circuit comprises a front-end stage configured to receive an AC input voltage and output a DC bus voltage, and a back-end stage configured to receive the bus voltage and responsive to the control signal, output a desired drive current through output terminals to the LED load so as to produce a target illumination intensity. The present disclosure widens the dimming depth of analog dimming in the LED dimming technology, achieves deep dimming and satisfies good dimming linearity in the entire dimming range.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: April 28, 2020
    Assignee: CURRENT LIGHTING SOLUTIONS, LLC
    Inventors: Longyu Chen, Hongbin Wei, Haomin Xu
  • Patent number: 10630080
    Abstract: A charger comprises a housing, a first multi-layer printed circuit board (PCB), a second multi-layer PCB, and a third multi-layer PCB. The first PCB comprises at least a portion of a primary side circuit. The second PCB comprises at least a portion of a secondary side circuit. The third PCB is perpendicular to the first PCB and the second PCB. An isolation coupling element is disposed on the third PCB. The isolation coupling element comprises a multi-layer PCB. The first PCB comprises a high voltage (HV) semiconductor package. A surface of a die paddle of the HV semiconductor package is exposed from a molding encapsulation of the HV semiconductor package.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: April 21, 2020
    Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.
    Inventors: Pei-Lun Huang, Yu-Ming Chen, Tien-Chi Lin, Jung-Pei Cheng, Yueh-Ping Yu, Zhi-Qiang Niu, Xiaotian Zhang, Long-Ching Wang
  • Patent number: 10620647
    Abstract: A regulating device includes a common mode choke, a switch device and a first control unit. The common mode choke includes an input side and an output side, wherein the input side is coupled to a power-supply device. The switch device includes a first input node, a second input node, a first output node, a second output node, and a third output node. The first output node is coupled to a first battery set, and the second output node is coupled to a second battery set, and the third output node is an empty node. The first control unit compares the first terminal voltage to the second terminal voltage for controlling the first input node to selectively connect to the first output node or the second output node and controlling the second input node to selectively connect to the second output node or the third output node.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: April 14, 2020
    Assignee: QUANTA COMPUTER INC.
    Inventor: Wei-Ting Yen
  • Patent number: 10574300
    Abstract: A wireless power transmitter for transmitting power by wireless to a terminal includes a power conversion unit and a power transmission control unit. The power conversion unit forms a wireless power signal for wireless power transfer using power supplied from a power supply unit. The power transmission control unit regulates a characteristic of the supplied power, based on orientation information of the terminal. A terminal includes a power receiving unit and a control unit. The power receiving unit receives a wireless power signal formed by a wireless power transmitter. The control unit detects whether or not an orientation of the terminal is changed while the wireless power signal is received, and transmits a control message for power regulation to the wireless power transmitter when the change in the orientation of the terminal is detected.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: February 25, 2020
    Assignee: LG ELECTRONICS INC.
    Inventors: Kihyun Jung, Jinmoo Park, Inchang Chu, Jeongkyo Seo, Jaesung Lee
  • Patent number: 10566909
    Abstract: A DC-DC converter and a method for operating the same are disclosed. The DC-DC converter includes an inverter, a transformer, a rectifier, a clamping assembly, and a control unit. The inverter has four interconnected primary semiconductor switches which form an inverter full bridge for converting an input DC voltage into an AC voltage. The transformer has a primary winding which is arranged in the bridge branch of the inverter full bridge. The rectifier is connected to the secondary winding of the transformer and is designed to rectify a secondary voltage of the transformer. The clamping assembly has an additional semiconductor switch and a clamping capacitor which is connected to the additional semiconductor switch in series. The rectified secondary voltage of the transformer is applied to the clamping assembly. The control unit is designed to control the primary semiconductor switches and the additional semiconductor switch.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: February 18, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Michael Denzner, Christopher Fromme
  • Patent number: 10536092
    Abstract: Systems and methods for power conversion are described. Symmetric topologies and modulation schemes are described that may reduce common-mode noise. For example, a system may include a transformer including a first secondary winding and a second secondary winding; a rectifier, including a set of switches, that connects taps of the first secondary winding and the second secondary winding to a first terminal and a second terminal, wherein the rectifier is symmetric with respect to the first secondary winding and the second secondary winding; a battery connected between the first terminal and the second terminal; and a processing apparatus that is configured to control the set of switches to rectify a multilevel voltage signal on the transformer, including: selecting a modulation scheme from among two or more modulation schemes based on a measured voltage level of the battery.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: January 14, 2020
    Assignee: Apple Inc.
    Inventors: Ashish K. Sahoo, Brandon Pierquet
  • Patent number: 10514398
    Abstract: According to various aspects and embodiments, a power device is provided. The power device includes an input configured to receive input power, an output configured to provide output power to a load, a power conversion circuit coupled to the input and configured with a first output line and a second output line, the first output line coupled to the output and configured to provide output current at the output, a capacitor coupled to a junction of the first output line and the output, and coupled to the second output line, and a controller coupled to the power conversion circuit. The controller is configured to receive a first current measurement for the first output line receive a first voltage measurement across the capacitor, and determine a load current based on the first current measurement and the first voltage measurement.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: December 24, 2019
    Assignee: SCHNEIDER ELECTRIC IT CORPORATION
    Inventor: Stefano De Cesaris
  • Patent number: 10504892
    Abstract: A semiconductor device of a circuit is provided. The circuit is configured to be operated under a power supply. The semiconductor device of the circuit includes a first transistor and a second transistor. The first transistor includes a first source region in a first bulk region; a first drain region defined by a well and a doped region, wherein the first source region and the doped region are separate by a distance, which is a factor which determines a breakdown voltage of the first transistor, the breakdown voltage being associated with the power supply; and a first gate. The second transistor includes a second source region in a second bulk region, the second source region electrically connected with the first source region and the first gate.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: December 10, 2019
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
    Inventors: Jia-Rui Lee, Kuo-Ming Wu, Yi-Chun Lin, Alexander Kalnitsky
  • Patent number: 10470295
    Abstract: A printed circuit board has: a first wiring pattern laid in a first layer such that, when a predetermined component is mounted in a predetermined mounting region, a first current path in an open ring shape leading from a first end to a second end is formed; a second wiring pattern laid in a second layer different from the first layer such that a second current path in an open ring shape leading from a third end to a fourth end is formed; a first conductive member formed between the second and third ends; and a second conductive member formed between the first and fourth ends. The first and second wiring patterns are so laid that, as seen in their respective plan views, the directions of the currents flowing across the first and second current paths, respectively, are opposite to each other.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: November 5, 2019
    Assignee: Rohm Co., Ltd.
    Inventors: Shingo Hashiguchi, Shoichi Harada
  • Patent number: 10470268
    Abstract: The LED driving circuit includes: a detecting circuit that detects whether an input current of the driving circuit is low or high frequency; a first stage converter that converts the input of the driving circuit to provide a DC power suitable for the LED; a first feedback loop that is activated by a low frequency current, to convert a current from a LED load to a feedback voltage and feed it back to the first stage converter, wherein in the first feedback loop, the feedback voltage changes as a function of the current of the LED load; and a second feedback loop that is activated by high frequency current, to convert the current from the LED load to the feedback voltage and feed it back to the first stage converter, wherein in the second feedback loop, the feedback voltage changes as a function of the current of the LED load.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: November 5, 2019
    Assignee: LEDVANCE GMBH
    Inventors: Xusheng Yang, Kaichun Huang
  • Patent number: 10461626
    Abstract: An active clamp circuit includes an active clamp switch having a drain node and a source node, an active clamp capacitor coupled in a series combination with the active clamp switch, a delay circuit, and an active clamp controller circuit coupled to the active clamp switch and to the delay circuit. The active clamp controller circuit is configured to i) receive an active clamp switch voltage based on a voltage developed across the drain node and the source node of the active clamp switch, ii) enable the active clamp switch based on a voltage amplitude of the active clamp switch voltage, and iii) disable the active clamp switch based on a delay signal generated by the delay circuit.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: October 29, 2019
    Assignee: Silanna Asia Pte Ltd
    Inventor: Aleksandar Radic
  • Patent number: 10411606
    Abstract: The power supply apparatus includes a control unit to control an operation of a first switching element based on a feedback voltage and a voltage of an auxiliary winding of a transformer detected by a voltage detection unit. In a state where the voltage detected by the voltage detection unit is equal to or more than a first threshold voltage, the control unit shifts to a first state where the first switching element is controlled so that the output voltage is to be a first output voltage based on the feedback voltage. In a state where the voltage detected by the voltage detection unit is less than a second threshold voltage smaller than the first threshold voltage, the control unit shifts to a second state where the first switching element is controlled so that the output voltage is to be a second output voltage smaller than the first output voltage.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: September 10, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Mitsunori Oshima
  • Patent number: 10396654
    Abstract: According to one aspect, embodiments of the invention provide a start-up circuit for a power system, the start-up circuit comprising an input configured to be coupled to a power source and to receive input DC power from the renewable energy based power source, an output, a current regulator portion coupled to the input and configured to provide a regulated output current derived from the input DC power to the output, and a voltage regulator portion coupled to the current regulator portion and the output and configured to generate a regulated output voltage at the output derived from the input DC power.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: August 27, 2019
    Assignee: SCHNEIDER ELECTRIC SOLAR INVERTERS USA, INC.
    Inventors: Ali Moallem, Zbigniew Wolanski
  • Patent number: 10381845
    Abstract: A power storage apparatus includes a plurality of power storage devices, a switch provided on a current-carrying path to the plurality of power storage devices, a voltage detecting unit that detects respective voltages of the power storage devices, and a control unit. The control unit switches a duty ratio of the switch so as to prevent or delay the voltages of the power storage devices from reaching an upper limit voltage during the charge.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: August 13, 2019
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Takeshi Nakamoto, Daisuke Konishi
  • Patent number: 10312793
    Abstract: A method for operating an electrical converter including: determining an optimized pulse pattern from a fundamental voltage reference for the electrical converter, wherein the optimized pulse pattern is determined from a first lookup table and includes discrete voltage amplitude values changing at predefined switching instants; determining a harmonic content reference from the fundamental voltage reference based on a second lookup table, wherein the harmonic content reference is a harmonic current reference determined from the frequency spectrum of a current of the electrical converter or the harmonic content reference is a filtered voltage reference determined by applying a first order frequency filter to a voltage, which current or voltage is generated, when the optimized pulse pattern is applied to the electrical converter; determining a harmonic content error from the harmonic content reference by subtracting an estimated output voltage and/or estimated output current of the electrical converter from the
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: June 4, 2019
    Assignee: ABB Schweiz AG
    Inventors: Eduardo Rohr, Peter Al-Hokayem, Tobias Geyer
  • Patent number: 10253744
    Abstract: A controller used to control a flyback switching mode power supply. The flyback switching mode power supply is constructed to charge a capacitor, and includes a rectifying device, a series arrangement of a switch and a primary winding of a transformer for receiving an input voltage, and a secondary winding of the transformer for charging the capacitor via the rectifying device to an output voltage. The controller is configured to sense the output voltage and to turn on the switch when the change of the output voltage over time becomes smaller than a predetermined threshold. By using the controller to sense and use the output voltage across the capacitor to turn on the switch, a controlled flyback switching mode power supply that makes use of voltage control is realized.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: April 9, 2019
    Assignee: NXP USA, Inc.
    Inventors: Michael Robert Garrard, Anoop K. Aggarwal, Ralph C. Ferrara
  • Patent number: 10243453
    Abstract: This disclosure describes a circuit, a method, and a system to mitigate common mode noise in a power converter. The converter may include a transformer that isolates input and output terminals with primary and secondary windings. The transformer may further include an auxiliary winding coupled in anti-parallel with a secondary winding. The auxiliary winding may inject a common mode current through a compensation capacitor and a Y-capacitor to cancel a common mode current induced at the secondary side to the primary side. The converter may include a coupler circuit that provides a varying impedance at different frequencies to facilitate the current injection and allocate voltages between the compensation capacitor and the Y-capacitor. A voltage clamping circuit may be employed to protect a coupler capacitor from overvoltage.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: March 26, 2019
    Assignee: Apple Inc.
    Inventors: Joao L. Andres, Bogdan T. Bucheru
  • Patent number: 10236779
    Abstract: In one embodiment, a power supply controller, or alternately a semiconductor device having a power supply controller, may have a first circuit configured to form a sense signal that is representative of a signal from an auxiliary winding of a transformer. A feedback circuit may be configured to allow the sense signal to increase in response to a turn-off of the power switch, to subsequently detect a second increase of the sense signal prior to subsequently turning on the power switch, and to form a feedback signal as a value of the sense signal responsively to the second increase of the sense signal.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: March 19, 2019
    Assignee: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventors: Zhibo Tao, Chih-Hsien Hsieh, Yue-Hong Tang
  • Patent number: 10230297
    Abstract: A high-voltage startup circuit in an integrated circuit with a high-voltage pin and an operating voltage pin is disclosed, capable of having both low standby power consumption and high-speed transient response. An ultra-high voltage transistor and a main NMOS transistor are connected in series via a joint node between the high-voltage pin and the operating voltage pin. A pull-up circuit controlled by a stop signal is connected between the joint node and a first gate of the main NMOS transistor. A pull-down circuit controlled by the stop signal is connected to the first gate of the main NMOS transistor. When the stop signal is de-asserted the pull-up circuit couples the joint node to the first gate. When the stop signal is asserted the pull-up circuit performs an open circuit and the pull-down circuit pulls down the first gate voltage.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: March 12, 2019
    Assignee: LEADTREND TECHNOLOGY CORPORATION
    Inventor: Kuo-Chin Chiu
  • Patent number: 10178720
    Abstract: An LED driver is configured to minimize power consumption during standby operating modes. The LED driver includes power factor correction (PFC) and isolated DC-DC conversion stages, driven by respective first and second regulators. An auxiliary sensor detects environmental conditions for a controller which generates standby or normal operating mode signals based thereon. A low standby isolated power supply circuit receives operating mode signals and is configured: responsive to normal operating mode signals to enable the voltage regulators; responsive to standby mode signals to disable the voltage regulators, and in both modes to supply power to the controller and auxiliary sensor. Accordingly, the controller and auxiliary sensor are continuously enabled whereas the PFC and DC-DC stages of the LED driver are disabled during standby modes. Additional circuitry may selectively disconnect voltage sensing resistance networks from the LED driver for further reductions in power consumption during standby mode.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: January 8, 2019
    Assignee: Universal Lighting Technologies
    Inventor: Wei Xiong
  • Patent number: 10177666
    Abstract: A method for regulating an output of a power converter includes receiving a signal from an auxiliary winding of an energy transfer element of the power converter. The energy transfer element includes an input winding coupled to an input of the power converter, an output winding coupled to the output of the power converter, and the auxiliary winding. The signal represents a line input voltage of the power converter during at least a portion of an on time of a power switch coupled to the input winding. The signal represents an output voltage of the power converter during at least a portion of an off time of the power switch. The power switch is switched in response to the signal to regulate the output of the power converter.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: January 8, 2019
    Assignee: Power Integrations, Inc.
    Inventors: Alex B. Djenguerian, Balu Balakrishnan
  • Patent number: 10097076
    Abstract: In one embodiment, a control circuit can include: a voltage feedback circuit configured to obtain a voltage feedback signal that represents an output voltage of the power stage circuit; a set signal generator configured to output a set signal when a secondary current crosses zero or a voltage sampling signal reaches a valley value; a reset signal generator configured to output a reset signal in a constant on time mode when the voltage feedback signal is greater than a first voltage threshold value, and to output the reset signal in a peak current mode when the voltage feedback signal is less than the first voltage threshold value; and a logic circuit configured to activate a switching control signal according to the set signal, and to deactivate the switching control signal according to the reset signal.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: October 9, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Huiqiang Chen, Jianxin Wang
  • Patent number: 10098194
    Abstract: A driver circuit includes a combined current and voltage control circuit for driving a light emitting diode (LED) load. The driver circuit includes an isolation transformer having primary, secondary, and auxiliary windings. A primary side circuit is coupled to the primary winding and includes a power factor controller and a switch. The power factor controller controls an output current to the LED load by controlling an operational state of the switch. A secondary side circuit is coupled to the secondary winding. The secondary side circuit includes a proportional and integration (PI) control portion which outputs a control signal. A combined voltage and current control circuit is coupled to the auxiliary winding and includes an optocoupler coupled to the power factor controller and to the PI control section. The combined voltage and current control circuit transmits a control signal from the PI control section to the power factor controller.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: October 9, 2018
    Assignee: Universal Lighting Technologies, Inc.
    Inventor: Wei Xiong
  • Patent number: 10084370
    Abstract: A power switch transistor for a switching power converter is maintained on during a re-startup period by a zener breakdown voltage following a fault condition for the switching power converter. A source voltage from the power switch transistor is used to charge a VCC capacitor that stores a power supply voltage for a controller for the switching power converter.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: September 25, 2018
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Guang Feng, Pengju Kong, Kai-Wen Chin, Mingsheng Peng
  • Patent number: 10008943
    Abstract: Each phase of a multi-phase voltage converter includes a power stage, passive circuit, and synchronous rectification (SR) switch. Each passive circuit couples its associated power stage to an output node of the voltage converter, and is switchably coupled to ground by the SR switch. The current through the SR switch has a half-cycle sinusoidal shape with a resonant frequency determined by the reactance of the passive circuit. A control circuit generates signals to control switches within the power stage and the SR switches. The control circuit measures current through the SR switch of each phase, and adjusts the duty cycles of the control signals for the phases so that the SR switches are switched off when zero or almost zero current is flowing through them.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: June 26, 2018
    Assignee: Infineon Technologies Austria AG
    Inventor: Amir Babazadeh
  • Patent number: 10003254
    Abstract: A digital AC/DC power converter comprises an active PFC module, a single switch module having a single switch, a power output module having a transformer, a digital control module having a microcontroller, and a rectifying and filtering module having a full-bridge rectifier, an EMI filter, and a capacitor that is less than 1 ?F. The single switch is electrically connected to the active PFC module, and a primary winding of the transformer is electrically connected to the active PFC module. The microcontroller provides a PWM signal to control the switching state of the single switch, so that the active PFC module transforms AC frequency from less than 300 Hz into over 30,000 Hz and outputs a rectified AC voltage waveform. The EMI filter blocks high electromagnetic frequencies and the capacitor smooths a variation in the rectified voltage waveform and output the smoothed rectified voltage waveform to the active PFC module.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: June 19, 2018
    Assignee: Digital Power Company Limited
    Inventors: Calvin Shie-Ning Wang, Zhen Qiu Huang
  • Patent number: 9991804
    Abstract: A power supply apparatus is provided, that supplies a bus voltage VBUS to a detachable device. A DC/DC converter generates a DC voltage VOUT used as the bus voltage VBUS. A USB controller receives the DC voltage VOUT as a power supply voltage, and detects whether or not the device is connected. The DC/DC converter generates the DC voltage VOUT such that (i) when the device is detected, the DC voltage VOUT has a specified voltage level, and such that (ii) when the device is not detected, the DC voltage VOUT has a voltage level that is lower than the specified voltage level and that is higher than a minimum operating voltage level required to operate the USB controller.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: June 5, 2018
    Assignee: ROHM CO., LTD.
    Inventor: Kenichi Motoki
  • Patent number: 9980330
    Abstract: In a power converter, a circuit determines an average value of an inaccessible current from an average value of an accessible current and a value of the operating duty cycle of the converter. A method of measuring an average value of an inaccessible current from a measured value of a current in a power converter by a duty cycle of a pulse width modulation (PWM) signal representing a duty cycle of the power converter. Coupling a voltage representing the measured value to an input of a low pass filter during a time period (D) and coupling the input of the low pass filter to a reference voltage during a time period (1?D).
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: May 22, 2018
    Assignee: Texas Instruments Incorporated
    Inventor: Isaac Cohen
  • Patent number: 9973093
    Abstract: In some examples, a controller device for a resonant mode power converter circuit comprises a feed-forward pin configured to receive an input voltage signal of the resonant mode power converter circuit, a feedback pin configured to receive an output voltage signal of the resonant mode power converter circuit, processing circuitry configured to determine a switching frequency based on the input voltage signal and the output voltage signal, a first control pin configured to deliver a first control signal to the first switch at the switching frequency, and a second control pin configured to deliver a second control signal the second switch at the switching frequency.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: May 15, 2018
    Assignee: Infineon Technologies Austria AG
    Inventors: Cheow Guan Lim, Nitin Agarwal, Jian-Wei Liu
  • Patent number: 9966837
    Abstract: A switched mode power supply is provided comprising a pulse-width-modulator (PWM), a power section, and a drive section for the power switch. The drive section consists of a new method of driving the power switch where it is desired that the switch terminals be isolated from the PWM ground. The new driver design, which incorporates a small isolation transformer along with unique modifications to the traditional DC restore circuit, is directed to solving problems when PWM type switching power supplies encounter fault conditions such as a short circuit across their output as well as protecting the switch and the load when an ordinary shutdown or disable command is received. One problem that arises with switch drivers that utilize isolation transformers during an overload event or even an ordinary shutdown event is that the driver does not turn off and hold off the power switch when it is commanded to do so.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: May 8, 2018
    Assignee: VPT, INC.
    Inventor: Kevin L. Seaton
  • Patent number: 9960689
    Abstract: A resonant control device and a resonant control method thereof controls a resonant converter connected with a load. An output voltage is applied across the load. Firstly, a setting voltage is used to perform voltage compensation on the output voltage to generate a control value. Then, pulse modulation signals are generated according to the control value and a switch value, so as to drive the resonant converter to regulate the output voltage. Each pulse modulation signal has the maximum frequency and the minimum frequency. The switch value is equal to the minimum frequency divided by the maximum frequency and less than 0.5. Finally, the process determines whether the control value is less than the switch value. If the answer is yes, PWM signals as the pulse modulation signals are generated, and their frequency is less than the maximum frequency to increase a lower-limit range of the output voltage.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: May 1, 2018
    Assignee: MEAN WELL (GUANGZHOU) ELECTRONICS CO., LTD.
    Inventor: Shao-Jie Lu