With Automatic Control Of The Magnitude Of Output Voltage Or Current Patents (Class 363/19)
  • Patent number: 11368013
    Abstract: An overcurrent protection method is provided. The overcurrent protection method is applied to a USB with a PD function. The overcurrent protection method includes the steps of converting an input voltage into a first voltage to provide power to the first electronic device; determining whether the working current of the first electronic device is greater than a first default value; determining whether the working current of the first electronic device is greater than a second default value; in response to the working current being greater than the first default value, a first sensing signal is generated to disable a switch and to form an open circuit between the first electronic device and the second electronic device; and in response to the working current being greater than the second default value, conversion of the input voltage into the first voltage is stopped.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: June 21, 2022
    Assignee: Wistron Corp.
    Inventors: Yong Bo Li, Yong Qiang Li, Wen Long Yang, Jun Xin Qiu
  • Patent number: 11329566
    Abstract: A DC power supply circuit includes a voltage regulator circuit, a transformer including a primary winding, a transistor connected to the primary winding and alternately repeating switching on and off of a current, a rectifier circuit connected to a secondary winding and converting a voltage output from the secondary winding into a DC voltage, and a control circuit for controlling an on/off duty ratio of the transistor according to a target voltage. When the target voltage is included in a first voltage range, the control circuit sets the duty ratio to be constant, and a transistor of the regulator circuit operates in a linear region. When the target voltage is included in a second voltage range higher than the first voltage range, the control circuit changes the duty ratio according to the target voltage, and the transistor operates in a saturation region.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: May 10, 2022
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventor: Tomohiro Hirakawa
  • Patent number: 11264889
    Abstract: There is provided an electric-power conversion apparatus that can protect semiconductor switching devices in accordance with the ambient temperature. The electric-power conversion apparatus includes a comparator that generates an output based on a comparison between the output of a sensor and a threshold value, a reference voltage circuit that produces the threshold value, and a control circuit that is configured in such a way as to be able to stop operation of a main circuit, based on the output of the comparator; the reference voltage circuit is configured in such a way as to change the threshold value in accordance with an ambient temperature under which semiconductor switching devices are laid.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: March 1, 2022
    Assignee: Mitsubishi Electric Cornoration
    Inventors: Hajime Takahashi, Toshikazu Takagi
  • Patent number: 11205967
    Abstract: A voltage conversion apparatus and a voltage conversion method thereof are provided. A conversion circuit converts outputs of a plurality of secondary windings to generate a conversion voltage or a conversion current to a resistor network of a feedback circuit to thereby change impedance characteristics of the resistor network. The feedback circuit adjusts a feedback voltage in response to the change in the impedance characteristics of the resistor network, so that a control circuit controls an output of a transformer circuit according to the feedback voltage.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: December 21, 2021
    Assignee: Power Forest Technology Corporation
    Inventors: Wen-Sheng Wang, Chia-Hsien Liu
  • Patent number: 11201550
    Abstract: A control device includes a detector which detects a voltage of each of the DC terminals in a state where a DC voltage is applied to one of the DC terminals and said one of the DC terminals is maintained at a fixed voltage; a minimum voltage terminal selection circuit which selects a low-voltage DC terminal with a lowest voltage among the DC terminals to which the DC voltage has not been applied, based on a detection result of the detector; and an arithmetic circuit which generates, in a connected bridge circuit to which the DC voltage has been applied, an AC voltage of a size that is equal to a difference between the voltage of said one of the DC terminals to which the DC voltage has been applied and the voltage of the low-voltage DC terminal selected by the minimum voltage terminal selection circuit.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: December 14, 2021
    Assignee: IKS CO., LTD.
    Inventors: Yuichi Kado, Takashi Imai
  • Patent number: 11165354
    Abstract: The instant disclosure concerns a power converter including a capacitor having first and second electrodes respectively coupled to first and second input terminals via a current-limiting element; at least one normally-on transistor; a circuit for powering a circuit for controlling the normally-on transistor; and a switch configurable to, in a first configuration, couple first and second input terminals of the power supply circuit, respectively to the first and second input terminals of the converter, upstream of the current-limiting element and, in a second configuration, connect the first and second input terminals of the power supply circuit respectively to the first and second electrodes of the capacitor, downstream of the current-limiting element.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: November 2, 2021
    Assignee: Commissariat à l'Energie Atomique et aux Energies Alternatives
    Inventors: Pierre Perichon, Sébastien Carcouet
  • Patent number: 11139742
    Abstract: A switching controller circuit for controlling a flyback power converter includes: a power transformer, a primary side controller circuit and a secondary side controller circuit. The power transformer is coupled between the input voltage and the output voltage in an isolated manner. The primary side controller circuit controls a primary side switch of the flyback power converter. The secondary side controller circuit generates a synchronous rectification (SR) signal, to control an SR switch of the flyback power converter. The SR signal includes an SR pulse and a soft switching (SS) pulse. The SR pulse controls the SR switch to be ON for an SR period, to achieve synchronous rectification at the secondary side. The SS pulse controls the SR switch to be ON for an SS period, to achieve soft switching of the primary side switch.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: October 5, 2021
    Inventors: Wei-Hsu Chang, Ta-Yung Yang, Yu-Chang Chen, Chao-Chi Chen, Chuh-Ching Li, Li-Di Lo, Hao-Wen Chung
  • Patent number: 11128227
    Abstract: A secondary controller applied to a secondary side of a power converter includes a control signal generation circuit. The control signal generation circuit is coupled to an output terminal of the secondary side of the power converter for detecting an output voltage of the secondary side and enabling a pulse signal to a signal source of the secondary side of the power converter, wherein the signal source enables a turning-on signal according to the pulse signal. The turning-on signal is coupled to a primary-side auxiliary winding of the power converter through a secondary-side auxiliary winding of the power converter to make the primary-side auxiliary winding generate a voltage, and a primary controller of a primary side of the power converter makes the primary side of the power converter be turned on according to the voltage.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: September 21, 2021
    Assignee: Leadtrend Technology Corp.
    Inventors: Hung-Ching Lee, Chung-Wei Lin, Tsung-Chien Wu, Bo-Yi Wu
  • Patent number: 11075580
    Abstract: A sensor comprises a first transistor comprising a first control terminal, a second transistor that is a scaled version of and connected to the first transistor and comprising a second control terminal, an operational amplifier connected to both the first and second transistors and configured to generate an intermediate signal at an output terminal, a variable current source, a current mirror, a measurement circuit, and a chopper circuit. The first and second control terminals are configured to receive a drive signal. The variable current source is configured to generate a first variable current as a function of the intermediate signal. The current mirror configured to apply a second variable current proportional to the first variable current to the second transistor. The measurement circuit is configured to generate a measurement signal indicative of current through the first transistor. The chopper circuit is configured to shift an offset of the operation amplifier.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: July 27, 2021
    Assignee: STMICROELECTRONICS S.R.L.
    Inventors: Roberto Pio Baorda, Stefano Ramorini, Paolo Angelini
  • Patent number: 11050351
    Abstract: A control method is introduced to operate an ACF power converter under a non-complimentary mode. A high-side switch is turned ON at least twice within a switching cycle of a low-side switch, to provide at least two high-side ON times. One of the high-side ON times follows the end of demagnetization time of a transformer in the ACF power converter, and the other follows the end of the blanking time that controls the maximum switching frequency of the low-side switch.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: June 29, 2021
    Assignee: WELTREND SEMICONDUCTOR INC.
    Inventors: Mu-Chih Lin, Chun-Teh Chen, Ren-Yi Chen, Ming-Ying Kuo, Jeng-Cheng Liu
  • Patent number: 10944331
    Abstract: A method for controlling a converter is disclosed. The converter includes a first switch and a second switch. The method includes: turning on then turning off the first switch for storing an energy in the converter; turning on then turning off the second switch for transferring the stored energy in the converter; and turning on the second switch again thereby injecting the energy into the converter, and then turning off the second switch to increase levels of oscillations.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: March 9, 2021
    Assignee: Sync Power Corp.
    Inventors: Hsian-Pei Yee, Ya-Wu Chung
  • Patent number: 10819210
    Abstract: A power supply apparatus including a PWM signal generating circuit, a power conversion circuit, a voltage dividing circuit, a capacitor circuit, and a feedback compensation circuit is provided. The PWM signal generating circuit generates and modulates a PWM signal according to a feedback signal. The power conversion circuit converts an input voltage into an output voltage according to the PWM signal. The voltage dividing circuit divides the output voltage and generates a first voltage to a node. The capacitor circuit generates a second voltage to the node according to the output voltage in response to a voltage change of the output voltage. The feedback compensation circuit generates the feedback signal based on the first voltage and a reference voltage before the output voltage is ready. The feedback compensation circuit generates the feedback signal based on the second voltage and the reference voltage after the output voltage is ready.
    Type: Grant
    Filed: September 2, 2019
    Date of Patent: October 27, 2020
    Assignee: Acer Incorporated
    Inventor: Tzu-Tseng Chan
  • Patent number: 10778035
    Abstract: A feed unit includes: a power transmission section configured to perform power transmission with use of a magnetic field or an electronic field; a power limiting section provided on a power supply line from an external power source to the power transmission section; and an operation stop section configured to forcibly stop the power transmission. The operation stop section forcibly stops the power transmission when a voltage between an input and an output of the power limiting section exceeds a first threshold. The power limiting section forcibly interrupts power supply to the power transmission section when the voltage between the input and the output exceeds a second threshold that is larger than the first threshold.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: September 15, 2020
    Assignee: SONY CORPORATION
    Inventors: Shinichi Haseno, Yoichi Uramoto
  • Patent number: 10742124
    Abstract: A power converter using an active-clamp flyback topology has a low-side switch, a high-side switch and a control circuit. The low-side switch connects a primary winding of a transformer to an input ground line, and the high-side switch is connected in series with a capacitor to form an active-clamp circuit connected in parallel with the primary winding. The control circuit provides high-side and low-side signals to the high-side and the low-side switches respectively, in response to a current-sense signal and a compensation signal. The control circuit is configured to operate the power converter in one of operation modes including a complementary mode and a non-complementary mode. When operated in the complementary mode, the high-side signal and the low-side signal are substantially complementary to each other, and the control circuit exits the complementary mode in response to the current-sense signal to enter the non-complementary mode.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: August 11, 2020
    Assignee: LEADTREND TECHNOLOGY CORPORATION
    Inventors: Yao Tsung Chen, Chih Chi Chang, Meng Jen Tsai
  • Patent number: 10671010
    Abstract: According to one embodiment, a power converting device includes a rectifier bridge configured to pulsate an AC voltage to generate a pulsating voltage, a first smoothing capacitor configured to smooth the pulsating voltage to generate a DC voltage, a primary winding connected to the first smoothing capacitor, a switch circuit configured to switch the DC voltage supplied from the first smoothing capacitor to the primary winding, and a first discharge circuit. The first discharge circuit includes a first discharge resistor configured to discharge electric charges remaining on the first smoothing capacitor and a first switch element configured to release the first discharge resistor from the first smoothing capacitor if the AC voltage is supplied and to connect the first discharge resistor to the first smoothing capacitor if the AC voltage is not supplied and the electric charges remain on the first smoothing capacitor.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: June 2, 2020
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Yoshiaki Hosokawa, Yutaka Usami
  • Patent number: 10666153
    Abstract: A control method for a power convert is disclosed. The power convert uses an active-clamp flyback topology and has low-side and high-side switches. The low-side switch is switched to generate consecutive switching cycles including a modified flyback cycle and a normal flyback cycle. Each of the consecutive switching cycles is not less than a blanking time generated in response to a load of the power converter. The high-side switch is constantly turned OFF during the normal flyback cycle. The high-side switch is turned ON after the blanking time during the modified flyback cycle to perform zero-voltage switching for the low-side switch.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: May 26, 2020
    Assignee: LEADTREND TECHNOLOGY CORPORATION
    Inventors: Yao Tsung Chen, Chih Chi Chang, Meng Jen Tsai
  • Patent number: 10644599
    Abstract: A sensor includes a first transistor including a first terminal and a second terminal defining a current path, and a first gate terminal configured to receive a drive signal. The sensor further includes a sensor circuit configured to generate a measurement signal indicative of a first current flowing through the first transistor. The sensor circuit includes a second transistor including a third terminal, a fourth terminal, and a second gate terminal. The third terminal is connected to the first terminal of the first transistor. The second gate terminal is configured to receive the drive signal. The second transistor is a scaled version of the first transistor. The sensor circuit further includes an operational amplifier, a variable current source, a current mirror, and a measurement circuit.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: May 5, 2020
    Assignee: STMICROELECTRONICS S.R.L.
    Inventors: Roberto Pio Baorda, Stefano Ramorini, Paolo Angelini
  • Patent number: 10637259
    Abstract: A short-circuit current protecting method of a charging control system is cooperating with at least a control unit and a plurality of power outlet electrically connected to an electronic switch. The control unit controls the mode of the electronic switches with turn on or off. The short-circuit current protecting method includes the following steps. Step 1 is detecting at least a current signal value of an AC power. Step 2 is determining whether the current signal value is grater than a predetermine current threshold. Step 3 is enabling a short-circuit current analyzing module if the current signal value is grater than the predetermine current threshold. Step 4 is turning off at least one of the electronic switches if the short-circuit current is determined by the short-circuit current analyzing module.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: April 28, 2020
    Assignee: AVER INFORMATION INC.
    Inventors: Chi-Fa Hsu, Chao-Hung Chang, Lien-Kai Chou, Cheng-Cheng Yu
  • Patent number: 10585444
    Abstract: A controller for use in a power converter including a jitter generator circuit coupled to receive a drive signal from a switch controller and generate a jitter signal. The jitter signal is a modulated jitter signal when the drive signal is below a first threshold frequency. The switch controller is coupled to a power switch coupled to an energy transfer element. The switch controller is coupled to receive a current sense signal representative of a current through the power switch. The switch controller is coupled to generate the drive signal to control switching of the power switch in response to the current sense signal and the jitter signal to control a transfer of energy from an input of the power converter to an output of the power converter.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: March 10, 2020
    Assignee: Power Integrations, Inc.
    Inventors: Giao Minh Pham, Lance M. Wong
  • Patent number: 10560030
    Abstract: A cable compensation circuit compensates a voltage drop in a cable coupled between a power supply and a load. The cable compensation circuit includes: a node where a voltage that depends on an input voltage of the power supply during a turn-on period of a power switch of the power supply and depends on an output voltage of the power supply during a turn-off period of the power switch is generated; a sensing RC filter generating a sense voltage that depends on a diode current by filtering the voltage of the node; and an averaging RC filter generating an average voltage by averaging the sense voltage.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: February 11, 2020
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Gwanbon Koo, Taesung Kim
  • Patent number: 10432097
    Abstract: Circuits and methods are provided for supplying power to a transformer of a switching DC/DC voltage converter within a power converter. The power converter includes separate nodes that can potentially supply such power. A first of these nodes is coupled, typically directly and with no energy-storing bulk capacitor, to a rectifier that supplies rectified power from an alternating current power source. A second node is also supplied power from the rectifier, but is coupled to a bulk capacitor that can store and supply energy as needed. The techniques disclosed herein use the first node to supply power to the transformer when feasible, and use the second node, and its associated bulk capacitor, to supply power otherwise. In so doing, the energy storage requirements of the bulk capacitor may be reduced, meaning that the capacitance and associated size of the bulk capacitor may be reduced relative to other power converter circuits.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: October 1, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Anders Lind, Andrey Malinin
  • Patent number: 10367420
    Abstract: Methods and circuits for regulating the voltage of the isolated output of an isolated buck converter. Pursuant to a representative method, a parameter of the primary side of an isolated buck transformer is measured, wherein the parameter is dependent in part upon the output voltage on the secondary side of the transformer. The duty cycle of the isolated buck converter is set based at least in part on the value of the measured parameter.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: July 30, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Vijay N. Choudhary, David Simon Baba
  • Patent number: 10360485
    Abstract: According to another embodiment, a system includes a driver circuit that drives a first output and a second output; a coil coupled between the first output and the second output such that the driver circuit drives current through the coil in response to control signals; and a programmable slew circuit coupled to the driver circuit. In some embodiments, a switch is coupled between the first output and the coil. In some embodiments an over-voltage protection circuit is coupled to protect the driver circuit.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: July 23, 2019
    Assignee: Integrated Device Technology, Inc.
    Inventors: Rui Liu, Tao Qi, Lijie Zhao, Gustavo James Mehas, Tae Kwang Park, Zhitong Guo, Siqiang Fan
  • Patent number: 10362653
    Abstract: This disclosure describes methods and apparatuses for controlling an isolated diming circuit. An exemplary circuit may include a voltage input device, a noninverting operational amplifier in electrical communication with a optoelectric coupler, an optoelectric coupler incorporating emitting and receiving photodevices, an inverting operational amplifier in electrical communication with the optoelectric coupler, a voltage output device in electrical communication with the inverting operational amplifier, and a lighting device.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: July 23, 2019
    Assignee: LEDVANCE LLC
    Inventor: Jerome Hittle
  • Patent number: 10326379
    Abstract: Provided is a power conversion device which suppresses a current unbalance of a plurality of secondary circuit modules provided in parallel and is manufactured in a compact size and at a low cost. The power conversion device of the invention is a DC-DC converter which boosts down and outputs an input voltage, and includes an input circuit which includes a switching element and output circuit modules which include a transformer and a rectifier element. A plurality of the output circuit modules are provided. The plurality of output circuit modules are electrically connected to the input circuit.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: June 18, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Tadahiko Chida, Shintaro Tanaka, Akihiro Goto
  • Patent number: 10326374
    Abstract: Presented is a converter circuit having main switching circuiton a primary side of a transformer, for controlling supply of a current to a storage inductor on the primary side when the main switching circuit is conductive. The convertor circuit comprises: a control circuit operatively coupled to the main switching circuit and for controlling the main switching circuit, the control circuit comprising a control capacitor adapted to enable the control circuit and turn off the main switching circuit; an auxiliary inductor magnetically coupled to the storage inductor and adapted to trigger the control circuit to operate and turn off the main switching circuit in response to a voltage change in the storage inductor when the main switching circuit being conductive; and a charging circuit coupled between the auxiliary inductor and the control capacitor and adapted to enable the auxiliary inductor to charge the control capacitor.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: June 18, 2019
    Assignee: SIGNIFY HOLDING B.V.
    Inventor: Zhi Quan Chen
  • Patent number: 10320300
    Abstract: Power converter and method thereof according to certain embodiments. For example, the power converter includes a primary winding, and a secondary winding coupled to the primary winding. Additionally, the power converter includes a first switch including a first switch terminal, a second switch terminal, and a third switch terminal. The first switch is configured to affect a first current associated with the primary winding. The first switch terminal corresponds to a first voltage, and the second switch terminal corresponds to a second voltage. The first voltage minus the second voltage is equal to a voltage difference. Moreover, the power converter includes a second switch including a fourth switch terminal, a fifth switch terminal, and a sixth switch terminal and configured to affect a second current associated with the secondary winding.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: June 11, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Qian Fang, Huawei Lv, Zhiliang Chen
  • Patent number: 10284100
    Abstract: A power converter includes an energy transfer element coupled between an input and an output of the power converter. A switch is coupled to the energy transfer element and a control circuit. The control circuit includes a drive signal generator to generate a drive signal to control switching of the switch to regulate the output of the power converter. An event detection circuit is coupled to the drive signal generator to indicate if a switching period of one switching cycle of the drive signal exceeds a threshold switching period. An event counter circuit is coupled to the event detection circuit to render dormant the drive signal generator for a period of time determined by a timer circuit if the event detection circuit indicates a period of a switching cycle of the drive signal exceeds the threshold switching period for a threshold consecutive number of switching cycles.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: May 7, 2019
    Assignee: Power Integrations, Inc.
    Inventors: Alex B. Djenguerian, Leif Lund
  • Patent number: 10267526
    Abstract: A power conversion apparatus (and an air conditioner including the same) may include a rectifier to rectify a voltage of an input alternating current (AC) power source and a voltage drop device to output a dropped voltage using the voltage from the rectifier. The voltage drop device may include a transformer and a communication voltage output device provided at a secondary side of the transformer to output a direct current (DC) voltage for operation of a communication device. Accordingly, a voltage may be stably supplied to the communication device while reducing standby power.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: April 23, 2019
    Assignee: LG Electronics Inc.
    Inventors: Jongwan Lee, Eungho Kim
  • Patent number: 10079542
    Abstract: A current source generating a charging current and a supply voltage by charging a capacitor with the charging current. The current source has a conversion circuit converting a line voltage into a second voltage, a current generation circuit generating the charging current based on the second voltage, and a control circuit controlling the current generation circuit based on the supply voltage. The charging current is controlled to be at a first current value when the supply voltage is lower than a first threshold voltage, the charging current is controlled to be at a second current value when the supply voltage is higher than a second threshold voltage. The first threshold voltage is lower than the second threshold voltage, and the first current value is lower than the second current value.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: September 18, 2018
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Bin Xiao, Yuedong Chen
  • Patent number: 10079544
    Abstract: A method for controlling an output of a power converter with a control circuit includes generating a drive signal to control switching of a switch to regulate the output of the power converter. It is detected if a switching period of one switching cycle of the drive signal exceeds a threshold switching period. The drive signal is disabled when a period of a switching cycle of the drive signal exceeds the threshold switching period for a threshold consecutive number of switching cycles.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: September 18, 2018
    Assignee: Power Integrations, Inc.
    Inventors: Alex B. Djenguerian, Leif Lund
  • Patent number: 10008944
    Abstract: Disclosed are a control method and a control circuit for a switching power supply, said switching power supply comprises a secondary side controller and a secondary side MOS transistor connected between a load and a secondary side winding of a transformer. The present invention is used for detecting a working state of the secondary side winding of a transformer and a type of a communication signal transmitted by a load, and for generating a switching pulse signal VG in a Reset Time interval of an on/off cycle according to the type of the communication signal; the primary side controller detects a variation amplitude of the transiently varied signal of the voltage drop at the pin feedback (FB) in the Reset Time interval; if the variation amplitude of the transiently varied signal is greater than a pre-set value ?Vref, the primary side controller judges that the signal is a communication signal, and records the communication signal.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: June 26, 2018
    Assignee: Suzhou Poweron IC Design Co., Ltd.
    Inventors: Haisong Li, Yangbo Yi, Changshen Zhao, Wenliang Liu
  • Patent number: 10003271
    Abstract: System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes a first controller terminal, a second controller terminal and a third controller terminal. The system controller is configured to receive an input signal at the first controller terminal and turn on or off a switch based on at least information associated with the input signal to adjust a primary current flowing through a primary winding of the power conversion system, receive a first signal at the second controller terminal from the switch, and charge a capacitor through the third controller terminal in response to the first signal.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: June 19, 2018
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Lieyi Fang, Zhiqiang Sun
  • Patent number: 9985543
    Abstract: A switching power supply is provided which includes: an output port; a transformer; a first voltage divider circuit, configured to divide a feedback voltage to obtain a first divided voltage; and a primary controller, configured to control a current of the primary winding of the transformer; where the primary controller includes: a first comparison module, configured to compare the first divided voltage with a first reference voltage to obtain a first comparison result; a second comparison module, configured to compare the power supply voltage with a second reference voltage to obtain a second comparison result; and an open circuit protection module, configured to generate an open circuit protection signal, where the primary controller is configured to stop control of the primary winding in response to the open circuit protection signal. The present disclosure can efficiently detect disconnection of the up-sampling resistor of the switching power supply and provide open-circuit protection.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: May 29, 2018
    Assignee: SUZHOU POWERON IC DESIGN CO., LTD.
    Inventors: Yangbo Yi, Haisong Li, Changshen Zhao, Wenliang Liu, Ping Tao
  • Patent number: 9966865
    Abstract: The power supply apparatus includes a control unit that can perform intermittent operation of alternately repeating a switching period and a switching halt period, wherein the switching period is for performing switching operation of alternately turning on or turning off two switching elements across a turn-off period for turning off both of the two switching elements, and the switching halt period is for halting the switching operation. In a transition from the switching period to the switching halt period, the control unit makes the transition to the switching halt period after turning on a second switching element. In a transition from the switching halt period to the switching period, the control unit also makes the transition to the switching period after turning on the second switching element.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: May 8, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yasuhiro Shimura, Hiroki Asano
  • Patent number: 9948191
    Abstract: A constant output circuit is disclosed that includes a power supply circuit, a LM-FOT control circuit, a switching circuit and a transformer. Output ends of the power supply circuit are respectively connected with a first input end of the LM-FOT control circuit and an end of a primary winding of the transformer. A controlling end of the LM-FOT control circuit is connected with a controlled end of the switching circuit. A second input end of the LM-FOT control circuit is connected with an output end of the switching circuit. An input end of the switching circuit is connected with the other end of the primary winding of the transformer. An end of a secondary line winding of the transformer is configured for outputting constant voltage signals. Another end of the secondary line winding of the transformer is grounded.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: April 17, 2018
    Assignee: TCL Technoly Electronics (Huizhou) Co., Ltd
    Inventors: Jianzhong Chen, Jitao Yang
  • Patent number: 9912228
    Abstract: A start-up circuit includes an input node, an output node, a reference node, and a depletion mode field-effect transistor (FET) having a first terminal coupled to the input node, a second terminal coupled to the output node, and a gate terminal. A Zener diode has a cathode coupled to the gate terminal of the FET and an anode coupled to the reference node. A first capacitor is coupled in parallel with the Zener diode, a first resistor is coupled between the gate terminal of the FET and the input node, and a second resistor is coupled between the second terminal of the FET and the reference node. The FET and the second resistor are configured to generate an output voltage on the output node, the output voltage being based on an input voltage on the input node and capped at a value below a peak value of the input voltage.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: March 6, 2018
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Mohammad Al-Shyoukh, Percy Neyra
  • Patent number: 9866125
    Abstract: An ac-dc power converter controller includes a switch driver circuit coupled to generate a drive signal to control switching of a power switch to control a transfer of energy from an input of the power converter to an output of the power converter. An input sense circuit is coupled to receive an input sense signal representative of the input of a power converter. A sense enable circuit is coupled to generate a sense enable signal in response to the drive signal. The sense enable signal is coupled to control the input sense circuit to sense the input sense signal for an extended duration of time after the power switch turns OFF.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: January 9, 2018
    Assignee: Power Integrations, Inc.
    Inventors: Zhao-Jun Wang, Giao Minh Pham, Roland Sylvere Saint-Pierre
  • Patent number: 9812944
    Abstract: A discharge device includes a switch element connected in parallel to an electrical storage element; a constant current output unit which supplies a constant current to the switch element; and a control unit which gives an on or off instruction to the constant current output unit, wherein a configuration is such that the control unit controls the constant current output unit so as to cause energy with which is charged in the electrical storage element to be discharged while being consumed by the switch element, and within an optional time for which an energization current of the switch element reaches a limiting current of the switch element, turn off the switch element in a region in which the energization current is lower than the limiting current.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: November 7, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toru Daigo, Taisuke Iwakiri, Takuya Miyanaga
  • Patent number: 9780638
    Abstract: Systems and methods to generate drive current in a power supply, independent of the input voltage, are provided. The power supply includes front end circuitry, control circuitry, and drive circuitry. The front end circuitry includes protection circuitry to defend against damage from EMI, voltage spikes, and the like. The control circuitry includes startup circuitry, power factor correction (PFC) circuitry, and output power configuration circuitry. The startup circuitry provides operational voltage to the PFC circuitry, derived from an input voltage, until an internally generated operational voltage becomes available. The PFC circuitry uses the operational voltage to generate output power for the drive circuitry based on the output power configuration circuitry. The drive circuitry includes drive current configuration circuitry to generate a drive current to drive a load, coupled to the power supply, independent of the input voltage.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: October 3, 2017
    Assignee: LEDVANCE LLC
    Inventor: Victor M. Simi
  • Patent number: 9766584
    Abstract: A switching power supply comprises a transformer; a switching element; a power supply control section which outputs a first gate voltage of a first pulse width consecutively for plural times when the switching element is driven in a burst mode in which the switching element is intermittently driven; a drive time control section which, based on the first gate voltage input consecutively for plural times when the switching element is driven, outputs a second gate voltage to the switching element consecutively for plural times and gradually increases a pulse width of the second gate voltage to a first pulse width from a second pulse width narrower than the first pulse width; and a switching section to which a feedback voltage is input which switches an input destination of the first gate voltage output by the power supply control section from the switching element to the drive time control section in the burst mode.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: September 19, 2017
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Takuya Ogishima
  • Patent number: 9712045
    Abstract: According to an embodiment, a circuit comprising includes a first switching circuit coupled to a power supply input, a second switching circuit coupled to an output of the first switching circuit, a supply capacitor coupled to the second switching circuit, and a startup cell coupled to the power supply input and the supply capacitor. The startup cell is configured to electrically couple the power supply input to the supply capacitor when the second switching circuit is not actively switching. The startup cell is also configured to electrically decouple the power supply input from the supply capacitor when the second switching circuit is actively switching.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: July 18, 2017
    Assignee: Infineon Technologies Austria AG
    Inventors: Mingping Mao, Junyang Luo, Guoxing Zhang
  • Patent number: 9705412
    Abstract: The present disclosure is directed to a switching power converter having a regulated output voltage or output current. The power converter uses a control unit having a signal conditioning circuit to produce a control voltage signal, which is used to drive a power stage of the converter. The signal conditioning circuit includes a comparator that compares a measured electrical quantity to a reference value representative of a desired regulated output quantity, and produces a digital detection signal based on the comparison. A control actuator uses the digital detection signal to produce a correction signal, which is received by an averaging circuit. The averaging circuit then produces the control voltage signal based on an average of the correction signal.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: July 11, 2017
    Assignee: STMICROELECTRONICS S.R.L.
    Inventor: Claudio Adragna
  • Patent number: 9667155
    Abstract: A switching power supply includes: a transformer having a primary coil and a secondary coil; a switching element that is connected in series to the primary coil of the transformer so as to turn a direct-current input voltage applied to the primary coil of the transformer ON and OFF; a rectifying and smoothing circuit that rectifies a voltage induced in the secondary coil of the transformer to generate a direct-current output voltage; and a control circuit that turns the switching element ON and OFF in accordance with the direct-current output voltage, wherein the control circuit includes an input correction circuit that detects a switching period of the switching element and limits a peak value of a current flowing through the switching element in accordance with the detected switching period.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: May 30, 2017
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Naotaka Matsuda
  • Patent number: 9651927
    Abstract: A power supply control system includes a remaining level detector 22 of a power-storing device 20; and an estimate computing unit 42 which estimates a prospective power generation of power-generating equipment 10 and a prospective load power consumption of connected loads, and thus, based thereupon and remaining level, a dischargeable time until remaining level reaches the minimum level, and computes an average power generation output of a power-generating equipment 10 and an average load power consumption connected loads 101-105, and thus power generation reaching time until the average power generation output reaches the average load power consumption; and a controller 43 which controls, if the dischargeable time is shorter than the power generation reaching time, to reduce power consumption of the connected loads 101-105.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: May 16, 2017
    Assignee: KYOCERA CORPORATION
    Inventor: Ryo Noguchi
  • Patent number: 9627985
    Abstract: A secondary control circuit includes a voltage regulator circuit coupled to an output of the power converter to provide a regulated power supply. One or more switched loads are coupled between a first terminal and an output ground terminal. The first terminal is coupled to the output of the power converter. Each switched load is coupled to draw a respective current from a load current to clamp the output of a power converter. One or more comparator circuits are coupled to a second terminal. The second terminal is coupled to receive an output sense signal. Each comparator circuit is coupled to receive a reference signal that is a scaled representation of a first reference signal. Each switched load is switched in response to a respective comparator circuit to draw a respective current from the load current of the power converter to clamp the output of the power converter.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: April 18, 2017
    Assignee: Power Integrations, Inc.
    Inventors: David Michael Hugh Matthews, Balu Balakrishnan, Alex B. Djenguerian
  • Patent number: 9621061
    Abstract: The power supply apparatus for obtaining a direct current from an alternating voltage source includes a first DC/DC converter for outputting a first direct current and a second DC/DC converter for a second direct current lower than the first direct current from the first DC/DC converter, and the output voltage of the first DC/DC converter is changed to a lower direct current and the second DC/DC converter is driven in a continuously-conducting state.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: April 11, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Minoru Hayasaki, Keisuke Samejima
  • Patent number: 9599640
    Abstract: Various arrangements for determining a voltage of a voltage source using pre-charging are presented. Such arrangements may include a measurement module which includes an analog to digital converter, a driver, and an interface. The interface may be electrically coupled with the analog to digital converter and the driver. The driver may be configured to output current to charge a capacitor. After a first predefined period of time, the driver may stop outputting current to pre-charge the capacitor. After the driver has stopped pre-charging the capacitor and a second predefined period of time has elapsed, the analog to digital converter may be configured to measure a voltage of the capacitor. Such arrangements may include a capacitor, wherein the capacitor is electrically coupled with the interface of the measurement module.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: March 21, 2017
    Assignee: ECHOSTAR TECHNOLOGIES L.L.C.
    Inventor: Jeremy Mickelsen
  • Patent number: 9601982
    Abstract: A method of and device for reducing power loss in a voltage conversion circuit. The voltage conversion circuit comprises a main power circuit and a switchable auxiliary circuit, which comprises a first and a second winding circuits. A switch controls the use of the first winding circuit, the second winding circuit, or both to reduce power lose during the voltage conversion.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: March 21, 2017
    Assignee: Flextronics AP, LLC
    Inventors: Martin Zhang, Wei Li, Anthony Brinlee
  • Patent number: 9590511
    Abstract: A power source apparatus comprises: a transformer that insulates a primary system and a secondary system and uses primary/secondary windings to transform an input voltage into an output voltage; a switching control device that is disposed in the primary system to drive the primary winding, and an output monitor device that is disposed in the secondary system to monitor the output voltage. The transformer includes a first auxiliary winding disposed in the primary system and a second auxiliary winding disposed in the secondary system. The output monitor device drives the second auxiliary winding to generate an induced voltage in the first auxiliary winding when the output voltage becomes smaller than a predetermined threshold voltage. The switching control device temporarily stops driving of the first winding upon detecting a light load state and resumes the driving of the first winding upon detecting the induced voltage in the first auxiliary winding.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: March 7, 2017
    Assignee: Rohm Co., Ltd.
    Inventor: Satoru Nate