Having Feedback Winding Inductively Coupled To Inverter Inductive Device (e.g., Tertiary Winding, Etc.) Patents (Class 363/21.16)
  • Patent number: 11984811
    Abstract: A power supply control device that controls a switching element of a switching power supply apparatus which includes a transformer having a primary winding, a secondary winding, and an auxiliary winding, the switching element coupled to the primary winding, and a capacitor coupled to the auxiliary winding, includes: a power supply terminal coupled to one end of the capacitor; a switch and a resistor coupled in series between the power supply terminal and a ground; a first control circuit that controls the switch; and a second control circuit that controls the switching element, in which the first control circuit performs control to turn on the switch when a first voltage applied to the power supply terminal continuously exceeds a first reference voltage for a first time, and the second control circuit performs control to turn off the switching element when the first voltage exceeds a second reference voltage higher than the first reference voltage.
    Type: Grant
    Filed: March 24, 2022
    Date of Patent: May 14, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Shinichiro Watanabe, Katsumi Inoue, Kanji Aoki
  • Patent number: 11956867
    Abstract: System and method for providing at least an output current to one or more light emitting diodes. The system includes a control component configured to receive at least a demagnetization signal, a sensed signal and a reference signal and to generate a control signal based on at least information associated with the demagnetization signal, the sensed signal and the reference signal, and a logic and driving component configured to receive at least the control signal and output a drive signal to a switch based on at least information associated with the control signal. The switch is connected to a first diode terminal of a diode and a first inductor terminal of an inductor. The diode further includes a second diode terminal, and the inductor further includes a second inductor terminal.
    Type: Grant
    Filed: August 12, 2021
    Date of Patent: April 9, 2024
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Lieyi Fang, Jun Zhou
  • Patent number: 11909300
    Abstract: A switch-mode power supply (SMPS), an SMPS system and a power supply method for an SMPS system are disclosed. The SMPS controller includes an output-voltage power supply unit, a built-in energy storage unit and a logic control unit. The output-voltage power supply unit is configured to charge the built-in energy storage unit using an output voltage from the SMPS system so that the built-in energy storage unit can provide an operating voltage for the logic control unit. The use of a stand-off energy storage capacitor can be dispensed with, and the use of the output voltage as a power supply is enabled. As a result, significant reductions in overall and standby power dissipation are achieved. In addition, the SMPS controller may further include a high-voltage power supply unit, which provides a hybrid power supply solution, together with the output-voltage power supply unit.
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: February 20, 2024
    Assignee: SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD.
    Inventors: Rulong Jiang, Liqiang Hu, Shungen Sun, Zhen Zhu, Xiaoru Gao, Yihui Chen, Hong Zhang, Pengfei Lu
  • Patent number: 11901883
    Abstract: Overload detection and protection for power switch circuits. For circuits with faster switching speed, fast fault detection and response to a detected overload condition may be desirable. Detection circuitry may monitor a voltage on the control terminal of one or more power switches. Based on empirical measurements, in an overload condition of a power switch circuit, e.g., a half-bridge circuit, the voltage at the control terminal may increase, and in some examples, increase to a magnitude that is greater than a supply voltage. A comparator may detect a voltage increase that exceeds a voltage magnitude threshold, output an indication to control circuitry for the power switch circuit, and the control circuitry may take action to protect the rest of the circuitry, such as reduce voltage or shut off the power switch circuit.
    Type: Grant
    Filed: November 29, 2021
    Date of Patent: February 13, 2024
    Assignee: Infineon Technologies AG
    Inventors: Michael Krug, Marco Bachhuber, Marcus Nuebling, Tomas Manuel Reiter
  • Patent number: 11811306
    Abstract: A power converter system converts power from an input source for delivery to an active load. An input current surge at startup may be reduced by combining power converter switch resistance modulation with active load control. In another aspect, an input current surge at startup in an array of power converters may be reduced by periodically reconfiguring the array during the startup phase to accumulatively increase the output voltage up to a predetermined output voltage. A power converter may include a controller that provides an over-current signal to the load to reduce the load or advise of potential voltage perturbations.
    Type: Grant
    Filed: October 20, 2022
    Date of Patent: November 7, 2023
    Assignee: Vicor Corporation
    Inventor: Patrizio Vinciarelli
  • Patent number: 11802042
    Abstract: A method of operating a MEMS device includes generating a MEMS drive signal, and generating and modifying the MEMS drive signal based upon a control signal to produce a modified drive signal. The method further includes generating the control signal by determining when a feedback signal from the MEMS device is at its peak value, comparing the peak value to a desired value when the feedback signal is as its peak, and generating the control signal depending upon whether the peak value is at least equal to a desired value. The modification of the MEMS drive signal based upon the control signal to produce the modified drive signal includes skipping generation of a next pulse of the modified drive signal when the control signal indicates the peak value is at least equal to the desired value.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: October 31, 2023
    Assignee: STMicroelectronics S.r.l.
    Inventor: Davide Terzi
  • Patent number: 11799379
    Abstract: A control circuit, system and method for switched-mode power supply are disclosed, the control circuit is for driving a first switch to convert an input voltage into an output voltage. The control circuit includes an on-time control unit, which receives a first signal characterizing switching frequency of first switch and a second signal characterizing current flowing through first switch and responsively generates a signal indicative of a turn-off instant for first switch. When a peak value of the current flowing through the first switch drops below a predefined value, the on-time control unit determines the turn-off instant for the first switch based on the first signal so that the switching frequency of the first switch is maintained at a target frequency. This design can effectively avoid the generation of audible noise, stabilize the output voltage against loading changes while maintaining desirable efficiency, and ensure operational safety of the switched-mode power supply.
    Type: Grant
    Filed: December 17, 2021
    Date of Patent: October 24, 2023
    Assignee: SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD.
    Inventors: Yanmei Guo, Yihui Chen, Haifeng Miao, Yuehui Li, Xiaoru Gao, Zhen Zhu
  • Patent number: 11764684
    Abstract: System controller and method for regulating a power converter. For example, the system controller includes a first controller terminal and a second controller terminal. The system controller is configured to receive an input signal at the first controller terminal and generate a drive signal at the second controller terminal based at least in part on the input signal to turn on or off a transistor in order to affect a current associated with a secondary winding of the power converter. Additionally, the system controller is further configured to determine whether the input signal remains larger than a first threshold for a first time period that is equal to or longer than a first predetermined duration.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: September 19, 2023
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yaming Cao, Qiang Luo, Yuan Lin, Lieyi Fang
  • Patent number: 11757353
    Abstract: A power converter system converts power from an input source for delivery to an active load. An input current surge at startup may be reduced by combining power converter switch resistance modulation with active load control. In another aspect, an input current surge at startup in an array of power converters may be reduced by periodically reconfiguring the array during the startup phase to accumulatively increase the output voltage up to a predetermined output voltage. A power converter may include a controller that provides an over-current signal to the load to reduce the load or advise of potential voltage perturbations.
    Type: Grant
    Filed: February 8, 2021
    Date of Patent: September 12, 2023
    Assignee: VICOR CORPORATION
    Inventor: Patrizio Vinciarelli
  • Patent number: 11736023
    Abstract: Communicating fault conditions between primary-side and secondary-side controllers of a Universal Serial Bus Power Delivery (USB-PD) device is described. The primary-side controller receives a control signal from the secondary-side controller across a galvanic isolation barrier. The primary-side controller converts the control signal into a first pulse signal and applies the first pulse signal to control a primary-side switch. When the primary-side controller detects that a first fault condition has occurred, the primary-side controller communicates a first information signal about the first fault condition to the secondary-side controller across the galvanic isolation barrier. The first information signal is generated by converting the control signal into a second pulse signal having a different pulse width than the first pulse signal. The primary-side controller applies the second pulse signal to control the primary-side power switch.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: August 22, 2023
    Assignee: Cypress Semiconductor Corporation
    Inventors: Arun Khamesra, Hariom Rai, Pulkit Shah
  • Patent number: 11728720
    Abstract: The present invention concerns a power converter including: a capacitor (CBUS) having first and second electrodes respectively coupled to first (E1) and second (E2) input terminals via a current-limiting element (R1, L1); at least one normally-on transistor (K1, K2, K3, K4, K5, K6); a circuit (170) for powering a circuit (CMD_K1, CMD_K2) for controlling the normally-on transistor; and a switch configurable to, in a first configuration, couple first (g) and second (h) input terminals of the power supply circuit (170) respectively to the first (E1) and second (E2) input terminals of the converter, upstream of the current-limiting element (R1, l1) and, in a second configuration, connect the first (g) and second (h) input terminals of the power supply circuit (170) respectively to the first and second electrodes of the capacitor, downstream of the current-limiting element (R1, L1).
    Type: Grant
    Filed: April 9, 2021
    Date of Patent: August 15, 2023
    Assignee: Commissariat à l'Energie Atomique et aux Energies Alternatives
    Inventors: Romain Montheard, Sébastien Carcouet, Pierre Perichon
  • Patent number: 11658576
    Abstract: An embodiment DC to DC conversion circuit comprises a DC to DC converter and a regulation circuit. The regulation circuit comprises a comparator configured to detect, during a discharge phase of the DC to DC converter, an overshoot period during which an output voltage of the DC to DC converter exceeds a target voltage, and a timer configured to measure a duration of the overshoot period.
    Type: Grant
    Filed: January 20, 2022
    Date of Patent: May 23, 2023
    Assignee: STMicroelectronics (Grand Ouest) SAS
    Inventor: Lionel Cimaz
  • Patent number: 11632033
    Abstract: A power supply circuit having a first capacitor, a transformer including a primary coil having a voltage of the first capacitor applied thereto, a secondary coil and an auxiliary coil, a second capacitor having a voltage from the auxiliary coil applied thereto, a transistor controlling an inductor current flowing through the primary coil, a control circuit outputting a first control signal when supply of the input voltage is unstopped, or is stopped yet a voltage of the second capacitor reaches a first level, and outputting a second control signal thereafter when the voltage of the second capacitor further reaches a second level, a first drive circuit outputting a first drive signal for switching control of the transistor in response to the first control signal, and a second drive circuit outputting a second drive signal for controlling on-resistance of the transistor to discharge the first capacitor, in response to the second control signal.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: April 18, 2023
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Takato Sugawara
  • Patent number: 11627023
    Abstract: In a transmission circuit, a first pulse signal with a first frequency and a second pulse signal with a second frequency are output according to a rising edge and a falling edge of a first input signal, respectively. When a second input signal indicates an active level, the second pulse signal is output according to the falling edge of the first input signal and the second frequency is changed to a third frequency. In a reception circuit, a first level of a first output signal is changed to a second level according to a first induced signal via a transformer, the second level of the first output signal is changed to the first level according to a second induced signal via the transformer, and a second output signal is changed to an active level when a frequency of the second induced signal has changed to the third frequency.
    Type: Grant
    Filed: January 27, 2022
    Date of Patent: April 11, 2023
    Assignees: DENSO CORPORATION, ROHM CO., LTD.
    Inventors: Junichi Hasegawa, Yusuke Michisita, Kazuma Takahashi, Daiki Yanagishima, Masahiko Arimura
  • Patent number: 11601063
    Abstract: A power supply receives AC power and generates a DC output voltage. The power supply may be divided into a primary section that converts AC power to a relatively high DC voltage. A secondary section converts this relatively high DC voltage into a well-regulated lower DC voltage. In an embodiment, the current and/or power supplied by the primary to the secondary side is used by the secondary side in a closed-loop feedback system to limit the current drawn by the secondary side to a configurable value.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: March 7, 2023
    Assignee: Astec International Limited
    Inventors: Donald Cedrick Ongyanco, Joey De Guzman, Vincent Vicente Vivar, Ricardo Bernado Roldan, Jr., Arvin San Juan
  • Patent number: 11575316
    Abstract: A power converter includes a power switch controlling current flow in the power converter and a variable capacitance coupled in parallel to the power switch. The variable capacitance is configured to add a frequency jitter to the power converter.
    Type: Grant
    Filed: November 1, 2021
    Date of Patent: February 7, 2023
    Assignee: Diodes Incorporated
    Inventors: Wei Chuan Su, Feng-Jung Huang, Yuan-Hung Lo
  • Patent number: 11509227
    Abstract: A converter system (100) includes a transformer (102) having a primary side (104) and a secondary side (106), a first switch (114) with a first terminal (1151) coupled to the primary side (104) and a second terminal (1152) coupled to a voltage supply terminal, a second switch (116) coupled to the first terminal (1151) of the first switch (114), loop control circuitry (119), coupled to the secondary side (106), and configured to generate an offset signal based on an output voltage provided at the secondary side (106) and to generate a compensated signal by compensating the offset signal to a sensed signal being representative of a first current flowing through the primary side (104), and switch control circuitry (120), coupled to the loop control circuitry (119), and configured to operate the first and second switches (114, 116) based on the compensated signal.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: November 22, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Pei-Hsin Liu, Cheng Liu
  • Patent number: 11431248
    Abstract: A hysteresis voltage detection circuit includes a voltage stabilizing unit, a first power switch, a first voltage dividing resister, a second voltage dividing resister, a third voltage dividing resistor and a second power switch. The voltage stabilizing unit is coupled to an adjustable voltage source. When both the first power switch and the second power switch are turned on, the first voltage dividing resistor, the second voltage dividing resistor, and the third voltage dividing resistor divide the adjustable voltage source. When both the first power switch and the second power switch are turned off, the first voltage dividing resistor and the second voltage dividing resistor divide the adjustable voltage source.
    Type: Grant
    Filed: September 21, 2020
    Date of Patent: August 30, 2022
    Assignee: ASIAN POWER DEVICES INC.
    Inventors: Yeu-Torng Yau, Tsung-Liang Hung
  • Patent number: 11418123
    Abstract: A power supply apparatus (10) suppressing a transient voltage is applied to an input voltage (50). The power supply apparatus (10) includes a power supply circuit (20), a feedback signal generation circuit (30) and a feedback signal control circuit (40). If the power supply circuit (20) stops receiving the input voltage (50), the feedback signal control circuit (40) controls the feedback signal generation circuit (30) to discharge so that the feedback signal generation circuit (30) controls the power supply circuit (20) to decrease an output voltage (60), so that when the power supply circuit (20) receives the input voltage (50) again, the power supply circuit (20) avoids generating an output overvoltage condition for the output voltage (60).
    Type: Grant
    Filed: December 8, 2020
    Date of Patent: August 16, 2022
    Assignee: P-DUKE TECHNOLOGY CO, LTD.
    Inventors: Lien-Hsing Chen, Ta-Wen Chang, Liang-Jhou Dai, Chien-Hsiung Huang
  • Patent number: 11411499
    Abstract: A power supply circuit includes an inductor, a power transistor configured to control an inductor current flowing through the inductor, and an integrated circuit driving the power transistor. The integrated circuit includes a first terminal that receives a power supply voltage for operating the integrated circuit, generated according to a variation in the inductor current, a second terminal to which a control electrode of the power transistor is coupled, a first drive circuit configured to drive the power transistor via the second terminal during a first time period to turn on the power transistor, and a second drive circuit configured to drive the power transistor via the second terminal during a second time period to turn on the power transistor, the second time period including at least a part of the first time period, driving capability of the second drive circuit being lower than that of the first drive circuit.
    Type: Grant
    Filed: May 24, 2021
    Date of Patent: August 9, 2022
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Hiroshi Maruyama, Takato Sugawara
  • Patent number: 11323039
    Abstract: A method for improving the conversion efficiency of a CCM mode of a flyback resonant switch power supply, comprising: presetting a critical value Tset, calculating a time interval Ttap between adjacent zero points in the current connection time, outputting a shutdown signal at the zero points, and comparing the time interval Ttap with the preset critical value Tset; when Ttap>Tset, controlling the current shutdown time to be less than the shutdown time of the preceding cycle and outputting a start signal; when Ttap=0, controlling the current shutdown time to be greater than the shutdown time of the preceding cycle and outputting a start signal; and when 0<Ttap<=Tset, controlling the current shutdown time to be the same as the shutdown time of the preceding switch cycle and outputting a start signal.
    Type: Grant
    Filed: December 29, 2018
    Date of Patent: May 3, 2022
    Inventors: Weifeng Sun, Rongrong Tao, Hao Wang, Jinyu Xiao, Wei Su, Shen Xu, Longxing Shi
  • Patent number: 11264905
    Abstract: An embodiment DC to DC conversion circuit comprises a DC to DC converter and a regulation circuit. The regulation circuit comprises a comparator configured to detect, during a discharge phase of the DC to DC converter, an overshoot period during which an output voltage of the DC to DC converter exceeds a target voltage, and a timer configured to measure a duration of the overshoot period.
    Type: Grant
    Filed: August 3, 2020
    Date of Patent: March 1, 2022
    Assignee: STMICROELECTRONICS (GRAND OUEST) SAS
    Inventor: Lionel Cimaz
  • Patent number: 10924022
    Abstract: A flyback converter having a transformer that includes a primary coil connected to the input terminal and a secondary coil, a semiconductor switch configured to switch current flow through the primary coil, a first measurement unit configured to measure the DC input voltage, and a second measurement unit configured to measure a voltage across the semiconductor switch. The flyback converter also includes a control unit having a synchronization terminal and configured to output a switching signal to the semiconductor switch with a constant frequency in accordance with a synchronization signal input to the synchronization terminal. In addition, the flyback converter includes a frequency adjustment unit configured to transmit a synchronization signal to the synchronization terminal based on the DC input voltage and the voltage measured by the second measurement unit such that the frequency of the switching signal output from the control unit becomes variable.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: February 16, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Manfred Krämer
  • Patent number: 10879793
    Abstract: System and method are provided for regulating a power converter. The system includes a signal processing component configured to receive a first input signal and a second input signal, process information associated with the first input signal and the second input signal, and output a drive signal to a switch based on at least information associated with the first input signal and the second input signal. The first input signal is associated with at least a feedback signal related to an output voltage of the power converter. The second input signal is associated with at least a primary current flowing through a primary winding of the power converter. The signal processing component is further configured to change a peak value of the primary current within a first predetermined range, and change the switching frequency of the power converter within a second predetermined range.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: December 29, 2020
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yuan Lin, Lieyi Fang
  • Patent number: 10855188
    Abstract: A flyback converter control architecture is provided in which primary-only feedback techniques are used to ensure smooth startup and detection of fault conditions. During steady-state operation, secondary-side regulation is employed. In addition, current limits are monitored during steady-state operation using primary-only feedback techniques to obviate the need for a secondary-side current sense resistor.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: December 1, 2020
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Yong Li, Cong Zheng, Xiaoyan Wang, Wenduo Liu
  • Patent number: 10826399
    Abstract: A method includes generating a gain transition signal in response to any one of an average value of a feedback signal, a slope of the feedback signal, a slope of an input signal of the power converter, a maximum value of the input signal, and a minimum value of the input signal, and generating a first gain control signal and a second gain control signal in response to the gain transition signal. A gain transition controller includes a transition signal generator generating the gain transition signal and a gain control signal generator generating the first gain control signal and the second gain control signal in response to the gain transition signal.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: November 3, 2020
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Hyun-Chul Eum, Tae-Sung Kim, Young-Mo Yang, Sung-Won Yun, Woo-Kang Jin
  • Patent number: 10707767
    Abstract: Techniques are provided for avoiding an avalanche breakdown voltage across a synchronous rectification (SR) switch on the secondary side of an isolated switched-mode power converter operating in a low-power mode, e.g., a burst mode, during which a load of the power converter draws negligible current. This is accomplished via use of a two-level switch driver for controlling a power switch on the primary side of the power converter. The two-level switch driver is configured to source low current levels to a control terminal (e.g., gate) of the power switch during burst-mode operation. This low current reduces the slope of the rising edge of voltage pulses on the primary and secondary sides of the power converter which, in turn, limits the peak of the voltage ringing across the SR switch. By limiting the voltage in this manner, the SR switch avoids entering avalanche breakdown.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: July 7, 2020
    Assignee: Infineon Technologies Austria AG
    Inventors: Cesar Augusto Braz, Roberto Quaglino
  • Patent number: 10666128
    Abstract: A system for regulating an output of a switched mode power supply circuit is configured to provide electric power to a load. The system may include a filter circuit. The filter circuit may be configured to suppress ripple signals at the power output. The system may include a feedback sense circuit including at least one feedback input end and at least one feedback output end. The feedback sense circuit may be configured for generating a feedback signal based on an output ripple signal at a filter input end and a DC regulation signal at a filter output end. The at least one feedback output end may be configured to be electrically coupled to the switched mode power supply circuit. Further, a switching of the switched mode power supply circuit may be based on the feedback signal.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: May 26, 2020
    Inventor: Eric Seungwoo Choi
  • Patent number: 10651759
    Abstract: A switching power supply device includes: a rectifier circuit to which an AC input voltage is input; an input smoothing circuit smoothing a DC input voltage output from the rectifier circuit; a power converter circuit converting the DC input voltage and outputs an output voltage; an overvoltage detection circuit generating an input overvoltage detection signal which is activated when the DC input voltage is higher than a first reference voltage level; and a discharge circuit discharging stored charge stored in the input smoothing circuit. The power converter circuit includes a switching element. Switching of the switching element is stopped and discharging of the stored charge is started, with activation of the input overvoltage detection signal serving as a trigger, and when the input overvoltage detection signal is subsequently inactivated, the discharging is stopped and the switching of the switching element is resumed.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: May 12, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masatoshi Tanioku, Takashi Saji
  • Patent number: 10643678
    Abstract: A clock generation circuit, which generates an output clock using an external clock as a target clock, includes a circuit arranged to change the output clock to high level in synchronization with an up edge of the target clock, circuits arranged to generate first and second ramp voltages with a period of interval between neighboring up edges of the target clock, and a circuit arranged to hold a comparison voltage corresponding to a second ramp voltage when an up edge of the target clock occurs. The level of the output clock is changed from high level to low level based on a comparison result between the first ramp voltage and the comparison voltage.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: May 5, 2020
    Assignee: Rohm Co., Ltd.
    Inventors: Takehiro Yoshida, Shun Fukushima
  • Patent number: 10630187
    Abstract: A switching power supply device has both a turn-on timing modulation function and a turn-off timing modulation function, performs the turn-off timing modulation in a PFM control region and the turn-on timing modulation in a PWM control region, and further continues at least one of the modulations even after the PFM control and the PWM control are switched from one to the other, to achieve a stable operation of the switching power supply device at the control switching boundary without significantly decreasing the modulation effect of frequency jitter control.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: April 21, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kensuke Takahashi, Takashi Saji
  • Patent number: 10615681
    Abstract: A rectifying element is connected to an auxiliary winding. The shut-down circuit receives a bias voltage output from the rectifying element. A shut-down circuit stops supply of power to a power supply terminal of the power supply control IC when the bias voltage is less than a set voltage. A power supply control IC controls a ratio of on-time to a switching cycle of the switching element, based on a current sensing voltage generated at a current sense resistor. The power supply control IC causes the switching operation of the switching element to stop when a voltage at the power supply terminal decreases to a stop voltage or less.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: April 7, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takafumi Nonaka, Kentaro Oshima, Teruyoshi Sato, Norihiro Suzuki
  • Patent number: 10554068
    Abstract: An electrical circuit for charging a secondary battery that comprises a dc-converter and an output connector that can be connected to the positive terminal of the secondary battery for applying a charging current to the secondary battery. The dc-converter has a voltage feedback connector for sensing a feedback voltage, wherein the dc-converter is adapted to regulate the output voltage by adjusting the output current at the output connector depending on the sensed feedback voltage and a feedback-sub-circuit connected to the output connector and to the voltage feedback connector of the dc-converter.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: February 4, 2020
    Assignee: Braun GMBH
    Inventors: Torsten Klemm, Lorraine Rispal, Ferdinand Hermann, Thomas Hohmann
  • Patent number: 10516338
    Abstract: Voltage converter controllers, voltage converters and methods are discussed regarding the adjustment of an on-time of an auxiliary switch of a voltage converter. First and second voltages are measured before a primary switch of the voltage converter is turned on and while the primary switch is turned on, and the on-time is adjusted based on the voltages.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: December 24, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Xiaowu Gong, Gerald Deboy, Yong Siang Teo, Zan Wang
  • Patent number: 10381932
    Abstract: A power conversion device includes a primary side rectifier, a main converter, a secondary side rectifier, a secondary side feedback controller, a PWM controller, and a driving compensator. The primary side rectifier is configured to generate a first voltage. The main converter includes a power transistor and is configured to adjust the first voltage to generate a second voltage according to a control signal. The secondary side rectifier is configured to generate an output voltage according to the second voltage. The secondary side feedback controller is configured to generate a feedback signal according to the output voltage. The PWM controller is configured to generate a PWM signal according to the feedback signal. The driving compensator includes a driving resistor circuit. The PWM signal outputs the control signal through the driving resistor circuit, and the driving compensator adjusts a resistance value of the driving resistor circuit according to the first voltage.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: August 13, 2019
    Assignee: CHICONY POWER TECHNOLOGY CO., LTD.
    Inventors: Ssu-Hao Wang, Tso-Jen Peng
  • Patent number: 10381935
    Abstract: A sample-and-hold circuit includes a first voltage generation unit, a second voltage generation unit, a stabilization capacitor. The first voltage generation unit generates a first voltage according to a first predetermined delay time and a voltage corresponding to an auxiliary winding of a power converter. The second voltage generation unit generates a second voltage according to K multiple of a discharge time of a secondary side of the power converter during a previous period of the power converter and the voltage, wherein K<1. When a sum of the K multiple of the discharge time and a second predetermined delay time leads a first valley of the voltage corresponding to a current period of the power converter, the second voltage generation unit outputs the second voltage. When the sum lags the first valley, the first voltage generation unit outputs the first voltage.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: August 13, 2019
    Assignee: Leadtrend Technology Corp.
    Inventors: Hsin-Hung Lu, Kuan-Hsien Chou
  • Patent number: 10367424
    Abstract: A control arrangement is disclosed for a switch mode power supply (SMPS), the SMPS comprising an opto-coupler configured to transfer, from a secondary side to a primary side of the switch mode power supply by means of an LED current, a control signal indicative of an error between an amplifier-reference-signal and an amplifier-sensed-signal indicative of an actual value of an output parameter, the control arrangement comprising: an error amplifier configured to integrate the error to determine the LED current; and a feedback loop configured to adjust the magnitude of the LED current by modifying the amplifier-reference-signal or the amplifier-sensed-signal in order to reduce the error. A SMPS comprising such a control arrangement, and a corresponding method is also disclosed.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: July 30, 2019
    Assignee: NXP B.V.
    Inventors: Hans Halberstadt, Frank van Rens
  • Patent number: 10348181
    Abstract: Provided is a power control apparatus for sub-modules in an MMC, which controls stable supply of power to sub-modules in MMC connected to an HVDC system and a STATCOM. The power control apparatus has at least one first resistor connected between P and N buses of MMC; a second resistor connected in series with the first resistor; a switch connected in series with the second resistor; a third resistor connected in parallel with the second resistor and the switch which are connected in series; a Zener diode connected in parallel with the third resistor; and a DC/DC converter connected between both ends of the Zener diode and configured to convert voltage across both ends of the Zener diode into low voltage, and supply the low voltage to the sub-modules, wherein a magnitude of current flowing through the Zener diode is controlled depending on ON/OFF switching of the switch.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: July 9, 2019
    Assignee: HYOSUNG HEAVY INDUSTRIES CORPORATION
    Inventors: June-Sung Kim, Hong-Ju Jung, Jung-Soo Park, Doo-Young Lee, Jong-Yun Choi
  • Patent number: 10320302
    Abstract: The proposed variant devices are intended for producing a highly stable constant voltage in a wide range of output voltages. A highly stable constant voltage is produced by generating a control signal which adjusts the relative pulse duration as a constant voltage is converted into a pulse voltage, taking into account a constant voltage setpoint value in the load, while also stabilizing a constant current and reducing the pulse components in the constant current through the use of negative feedback.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: June 11, 2019
    Assignee: Closed-Up Joint-Stock Company Drive
    Inventors: Yuriy Igorevich Romanov, Stanislav Vladimirovich Maletskiy
  • Patent number: 10298221
    Abstract: In some examples, a control circuit is configured to control a transistor, and the control circuit includes a leading-edge detection unit configured to detect a time interval that corresponds to a leading-edge current spike through the transistor, wherein the time interval is independent of temperature. In some examples, the control circuit also includes a blanking unit configured to prevent the control circuit from turning off the transistor during the time interval.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: May 21, 2019
    Assignee: Infineon Technologies Austria AG
    Inventor: Xiaowu Gong
  • Patent number: 10256731
    Abstract: Apparatus and associated methods relate to continuously providing power to a load throughout an interruption of a power source. While the power source is providing power, a converter is exciting a primary winding of a transformer. A load winding of the transformer delivers power to a load connected thereto, and a holdup winding provides power to a holdup circuit, which stores energy for use when the power source is interrupted. A turns ratio of the holdup winding to the primary winding is greater than one so that the energy stored by the holdup circuit is at a voltage that is greater than or equal to the voltage used for exciting the primary windings. If the voltage used for exciting the primary windings falls below a predetermined threshold, a one-shot controls the transfer of energy stored in the holdup circuit to a storage capacitor supplying current to the primary windings.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: April 9, 2019
    Assignee: Simmonds Precision Products, Inc.
    Inventor: Robbie W. Hall
  • Patent number: 10148181
    Abstract: In one form, a switched mode power supply controller with frequency foldback includes a pulse width modulator responsive to a clock signal to generate a drive signal having a pulse width that varies in response to a feedback signal, and a variable frequency oscillator having a first input for receiving the feedback signal, a control input for receiving a programmable control signal defining a foldback starting frequency, a foldback ending frequency, a foldback starting voltage, and a foldback ending voltage, and an output for providing the clock signal having a variable frequency that varies over a range between the foldback starting frequency and the foldback ending frequency as the feedback signal varies between the foldback starting voltage and the foldback ending voltage, respectively. In another form, a switched mode power converter uses such a switched mode power supply controller with an inductive element, switch, and feedback circuit.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: December 4, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Ajay Karthik Hari, Bryan Wayne McCoy, Thomas Ciccone
  • Patent number: 10116161
    Abstract: A line ripple compensation technique is provided for a switching power converter operating in both a pulse frequency mode of operation and a pulse width modulation mode of operation.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: October 30, 2018
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Kai-Wen Chin, Fuqiang Shi, Pengju Kong, David Nguyen
  • Patent number: 10075082
    Abstract: A power supply detects a falling rate of an output voltage for fast load-transient response. The power supply with a primary side and a secondary side isolated from each other comprises a primary-side control circuit and a secondary-side control circuit. The primary-side control circuit controls a power switch to convert an input power source on the primary side into an output power source on the secondary side. The output power source has the output voltage. The secondary-side control circuit detects the falling rate and sending information to the primary-side control circuit when the falling rate exceeds a predetermined rate. In response to the information, the primary-side control circuit starts anew switching cycle of the power switch.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: September 11, 2018
    Assignee: LEADTREND TECHNOLOGY CORPORATION
    Inventors: Ching-Tsan Lee, Chung-Wei Lin, Yang-Sheng Lin
  • Patent number: 10056774
    Abstract: A discharge device provided with a switching unit configured by a first switch element and a second switch element connected in series, a first power storage element connected in parallel with both ends of the switching unit, a second power storage element connected in parallel with both ends of the second switch element, and a control unit which controls on/off switching of the first switch element and the second switch element in such a manner that a portion of the energy charged in the first power storage element is charged and discharged at least once by the second power storage element, and the energy charged in the first power storage element is discharged while being consumed in one or all of the first switch element and the second switch element.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: August 21, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toru Daigo, Nobuhiro Kihara, Yuji Kuramoto
  • Patent number: 9985538
    Abstract: In accordance with embodiments of the present disclosure, a switch mode power supply may include a transformer, a controller configured to generate a periodic switching signal, a switching transistor coupled between a sense node and the transformer, primarily configured to prevent or permit current flow in the transformer primary winding in accordance with the switching signal, a sense resistor coupled to the switching transistor at a sense node, and a limit circuit configured to obtain a voltage of the sense node at a particular point of the switching period as an indicator of the primary winding current, detect a duration of a demagnetizing interval, and generate a limit signal, based on the sense node voltage and the demagnetizing interval, indicating a power supply output current exceeding a limit threshold.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: May 29, 2018
    Assignee: Dell Products L.P.
    Inventors: Wei Cheng Yu, Tsung-Cheng Liao, Merle Jackson Wood, III, Yan Yang, Keith J. Kasprzak
  • Patent number: 9985532
    Abstract: A switching power converter controller is provided that transitions between constant voltage pulse frequency modulation operation and constant current operation responsive to a comparison of a peak voltage for the constant voltage pulse frequency modulation operation and a peak voltage for the constant current operation.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: May 29, 2018
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Juyoung Yoon, Fuqiang Shi
  • Patent number: 9899970
    Abstract: A high-power solid-state RFPA includes an output stage having a power transistor and a current enhanced driver that drives the output stage. The current enhanced driver includes an inductor and first and second transistors arranged in totem-pole-like configuration. When the first transistor is turned on and the second transistor is turned off, the inductor supplies a first charging current to the output stage, to assist in charging the input gate-source capacitor (Cgs) of the power transistor in the output stage. The first transistor further provides a second charging current that supplements the first charging current, thereby enhancing charging of the gate-source capacitor Cgs. Conversely, when the first transistor of the driver is turned off and the second transistor is turned on, the second transistor provides a discharge path through which the gate-source capacitor Cgs can discharge.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: February 20, 2018
    Assignee: Eridan Communications, Inc.
    Inventor: Chandra Khandavalli
  • Patent number: 9812972
    Abstract: A switching converter converts an input signal to a regulated output signal using a switch and a transformer with a primary winding and a secondary winding. A wake up management circuit receives a transformer demagnetization signal and forces by wake up pulses the switch on when the switching converter operates in a burst mode. Sampled values of the transformer demagnetization signal are received. A setting circuit sets a first peak value of the current of the primary winding. A comparison circuit compare the sampled values with a voltage threshold and the preceding sampled value. In response thereto, the first peak value of the primary winding current is either maintained or a new peak value is set.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: November 7, 2017
    Assignee: STMicroelectronics S.r.l.
    Inventors: Salvatore Tumminaro, Andrea Rapisarda, Alfio Pasqua
  • Patent number: 9794993
    Abstract: A light-emitting diode (LED) driving device comprising: a rectifier configured to convert alternating current (AC) power to direct current (DC) power; a convertor including: a transformer including a primary-side winding connected to the rectifier; and a main switch connected to the primary-side winding of the transformer; a controller configured to output a control signal to the main switch in response to a feedback signal; and an output modifier configured to modify the feedback signal.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: October 17, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Bong Jin Lee