With Automatic Control Of The Magnitude Of Output Voltage Or Current Patents (Class 363/21.01)
  • Patent number: 11128210
    Abstract: A PFWM control system for a switching-mode power supply (SMPS) circuit including a boost conversion circuit and a DC-DC converter. The PFWM control system includes a duty cycle control unit, a frequency control unit and a PFWM waveform generator module. The duty cycle control unit samples an output voltage or current or power of the DC-DC converter, and calculates a duty cycle of a switching component of the SMPS. The frequency control unit samples an input or output voltage of the boost conversion circuit, and calculates an operation frequency of the switching component. The PFWM waveform generator module synthesizes a PFWM drive signal according to the duty cycle and operation frequency. The PFWM drive signal drives switching component of the boost conversion circuit and the DC-DC converter, so as to control an output voltage, an output current, or an output power provided to a load by the DC-DC converter.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: September 21, 2021
    Assignee: SHANGHAI TUITUO TECHNOLOGY CO., LTD
    Inventors: Renhong Li, Zhuo Shen
  • Patent number: 11108246
    Abstract: The present invention provides a charging system and a charging circuit thereof, including a circuit of a charging apparatus and a circuit of a wireless portable electronic device capable of recognizing an electric connection relationship with the charging apparatus.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: August 31, 2021
    Assignee: ZHUHAI JIELI TECHNOLOGY CO., LTD
    Inventors: Jiancheng Weng, Haitao Huang
  • Patent number: 11063428
    Abstract: A switch circuit includes a first switch, a current protection component, a current detection circuit, and a controller. The first switch conducts a primary side coil. The current protection component generates a detection voltage. The current detection circuit outputs a protection voltage. When the detection voltage is not greater than a first threshold, the current detection circuit generates a first voltage corresponding to the detection voltage as the protection voltage. When the detection voltage is greater than the first threshold, the current detection circuit generates a second voltage corresponding to the detection voltage as the protection voltage, where the first voltage is different from the second voltage. The controller is suitable for making the first switch selectively conducting and not conducting. When the protection voltage is greater than a second threshold, the controller does not increase a proportion of a conduction time to a non-conduction time of the first switch.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: July 13, 2021
    Assignee: CHICONY POWER TECHNOLOGY CO., LTD.
    Inventors: Hsien-Yi Tsai, Yu-Chen Liu
  • Patent number: 11050350
    Abstract: An active clamp switching power converter circuit includes a sensing circuit that generates a sensed auxiliary winding voltage of an auxiliary winding around the core. A primary side controller controls switching of a power switch coupled to a primary winding to control current through the primary winding and controls switching of the active clamp switch based on the sensed voltage to control leakage energy when the power switch is turned off. The primary side controller regulates timing of the switching to achieve a zero voltage switching condition prior to turning on the power switch for power efficient operation.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: June 29, 2021
    Assignee: Huayuan Semiconductor (Shenzhen) Limited Company
    Inventors: Jinho Choi, Richard M. Myers, Liang Yan, Wanfeng Zhang, Junjie Zheng
  • Patent number: 11043903
    Abstract: Reverse currents are prevented using existing components, like a primary-side current transformer. A power supply includes an isolation transformer, a switch, a synchronous rectifier, a smoother, a controller with a signal generator circuit that outputs main drive signals for main switching elements of the switch and drive signals for synchronous rectifier elements of the synchronous rectifier, and a current detector that has a current transformer, detects a current flowing to the switch, and outputs an output current detection signal. The controller includes an OR circuit that generates an OR signal for the main drive signals and a reverse current determination circuit that determines whether a reverse current has occurred based on the OR signal and the output current detection signal. When the occurrence of a reverse current has been determined, outputting of the main drive signals and the drive signals is stopped.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: June 22, 2021
    Assignee: TDK CORPORATION
    Inventors: Kazuki Ishizawa, Keita Fukudome
  • Patent number: 10998821
    Abstract: A control method, which is applied to a conversion circuit including at least one bridge arm and an inductor, the bridge arm including an upper semiconductor switch and a lower semiconductor switch connected in series, and one end of the inductor being connected to a midpoint of the bridge arm, includes: detecting a direction of current of the inductor when a scram event occurs in the conversion circuit; turning on the upper semiconductor switch and turning off the lower semiconductor switch when the direction of current of the inductor is a first direction, wherein the first direction is the direction when the current flows from one end of the inductor to the midpoint of the bridge arm; and turning off the upper semiconductor switch and turning on the lower semiconductor switch when the direction of current of the inductor is a second direction.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: May 4, 2021
    Assignee: Delta Electronics, Inc.
    Inventors: Guoqiao Shen, Jinfa Zhang
  • Patent number: 10985663
    Abstract: Various embodiments of apparatuses, systems, and methods for controlling the operating status of a power converter during, a standby mode, a powered mode, and a transition from the standby mode to the powered mode is described. For at least one embodiment, a power converter includes a primary controller and a secondary controller wherein the primary controller includes a first circuit configured to initiate a transition from standby mode to powered mode upon receipt of a wake-up signal and wherein the first circuit is powered during standby mode. For at least one embodiment, the first circuit is powered during a transition from a standby mode to a powered mode by voltages induced in a third coil of a transformer by a device battery powering a second coil of the transformer.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: April 20, 2021
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: BongGeun Chung, Gwanbon Koo, Taesung Kim
  • Patent number: 10985673
    Abstract: One or more embodiments relate to a circuit that can be used to prevent cross conduction in an SMPS including multiple half-bridge modules connected in parallel to a single output inductor and driven by a single pulse width modulation (PWM) signal. According to certain aspects, each high-side driver and low-side driver in a single half-bridge module is synchronized in their switching with corresponding high-side drivers and low-side drivers in other half-bridge modules.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: April 20, 2021
    Assignee: Renesas Electronics America Inc.
    Inventor: Tetsuo Sato
  • Patent number: 10985662
    Abstract: Various embodiments of apparatuses, systems, and methods for controlling the operating status of a power converter during, a standby mode, a powered mode, and a transition from the standby mode to the powered mode is described. For at least one embodiment, a power converter includes a primary controller and a secondary controller wherein the primary controller includes a first circuit configured to initiate a transition from standby mode to powered mode upon receipt of a wake-up signal and wherein the first circuit is powered during standby mode.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: April 20, 2021
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: BongGeun Chung, Gwanbon Koo, Taesung Kim
  • Patent number: 10972012
    Abstract: Embodiments of the present application provide a control circuit and a control method of a flyback converter, the control circuit comprises: a first sampling module, a second sampling module, and a control module; the first sampling module is coupled to the control module and the flyback converter, and outputs a first voltage signal to the control module; the second sampling module is coupled to the control module and the flyback converter, and outputs a second voltage signal to the control module; where the first voltage signal reflects an input voltage of the flyback converter, the second voltage signal reflects an output voltage of the flyback converter; the control module outputs a control signal according to the first voltage signal and the second voltage signal, and the control signal reflects a turn-on time of the switch in the flyback converter.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: April 6, 2021
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Xiaoping Fu, Xinghua Zhang
  • Patent number: 10958179
    Abstract: Reduced voltage switching of a main switch in flyback power converters. Example embodiments are methods including: driving a primary current with a first polarity in a primary winding of a transformer, and a secondary winding of the transformer arranged for flyback operation; creating, by the primary current, a charge voltage on an auxiliary winding of the transformer; charging, by the charge voltage, a capacitance coupled to the auxiliary winding; ceasing the driving of the primary current and discharging an energy in a field associated with the secondary winding to provide an output voltage of the power converter; inducing a primary current with a second polarity in the primary winding by coupling the capacitance to the auxiliary winding; and reducing voltage across a main switch coupled to the primary winding, the reducing by the primary current with the second polarity.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: March 23, 2021
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Gwanbon Koo, Youngbae Park, Taesung Kim, BongGeun Chung
  • Patent number: 10958176
    Abstract: Example embodiments of the systems and methods of CCM primary-side regulation disclosed herein subtract an estimate of the secondary IR drop from each output voltage sample. This allows a fixed sample instant to be set (with regard to the beginning of the off or flyback interval), and removes the need to hunt for or adjust to an optimum sample instant, or one with minimum IR drop error. The estimate of the IR drop may be adjusted on a cycle-by-cycle basis, based on the commanded primary peak current, knowing that the peak secondary current will be directly proportional by the turns ratio of the transformer. For improved accuracy, an adjustment may be made for the decay of secondary current during the delay to the sample instant, if the inductance value is known.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: March 23, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Andrew Bernard Keogh, Joseph Michael Leisten, William James Long
  • Patent number: 10958177
    Abstract: A flyback converter is disclosed having a secondary side controller that generates an input current for an optocoupler diode by driving a variable resistor with a control voltage. The secondary side controller varies a variable resistance for the variable resistor to compensate for current transfer ratio gain variations for the optocoupler.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: March 23, 2021
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Tao Li, Pengju Kong, Juyoung Yoon, Qingqing Zong
  • Patent number: 10951110
    Abstract: Disclosed in embodiments of the present invention are a control method and device for an alternating-current and direct-current conversion circuit, and a computer storage medium. The alternating-current and direct-current conversion circuit comprises a first commutation unit, a second commutation unit, and a coupling unit. By obtaining voltage information and current information of the alternating-current and direct-current conversion circuit, a controllable device of the first commutation unit can be controlled to be turned on in delay or turned off in advance; and the second commutation unit is controlled to work in a controllable rectification state or a controllable inversion state or an uncontrollable rectification state.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: March 16, 2021
    Assignees: Global Energy Interconnection Research Institute Co., Ltd, State Grid Corporation of China
    Inventors: Zhanfeng Deng, Jun Ge, Guoliang Zhao, Jieying Song, Weiguo Li, Zhengang Lu, Yunfei Xu, Zhe Zhou, Haijun Liu, Dong Liang, Xiaolin Mo, Pengliang Xu, Guofu Chen, Xiang Wang, Guozhong Zhang, Weidong Shen, Wenyuan Ning, Feng Wang
  • Patent number: 10933768
    Abstract: A vehicle charging system includes a charger configured to adjust an output voltage to achieve a voltage request and output a measured output voltage. The vehicle charging system further includes a controller programmed to measure a terminal voltage of a traction battery being charged and receive the measured output voltage from the charger. The controller is further programmed to output the voltage request as a sum of a full charge voltage and an estimated voltage measurement error between the measured output voltage and the terminal voltage.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: March 2, 2021
    Assignee: Ford Global Technologies, LLC.
    Inventors: Yuan Zhang, Jeffery R. Grimes, Navid Rahbari Asr, Lila Ghannam, Changjian Hu, Kevin Vander Laan, Matthew Roger Dedona
  • Patent number: 10924021
    Abstract: An apparatus for controlling a switching power supply during burst control that includes a switching period and a no switching period. The switching power supply includes first and second switching elements and a resonance circuit. The control apparatus includes a load detecting circuit that shunts and averages a resonance current of the resonance circuit, an off signal generating circuit that generates off signals for turning off the first and second switching elements during the switching period, an on signal generating circuit that obtains a number of resonance cycles of the ringing voltage in the no switching period and generates a first pulse on signal for turning on the second switching element to restart the switching period, and a control circuit that receives the off signals and the first pulse on signal, and generates first and second control signals for alternating on-off control of the first and second switching elements.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: February 16, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Tsuyoshi Yoshizawa, Jian Chen
  • Patent number: 10861639
    Abstract: A device for controlling a switching mode power supply includes a regulation module, a feedback node, and a resistance module. The regulation module is adapted to cause a switching module to selectively couple, based on an oscillation frequency, a primary side winding of a transformer and a supply to control a voltage, current, or power output at a secondary side winding of the transformer. The feedback node is adapted to receive an indication of a voltage at the secondary side winding of the transformer. The resistance module is adapted to selectively set a pull-up resistance based on a comparison between a time-controlled frequency and a voltage-controlled frequency that is generated based on a voltage at the feedback node, wherein the regulation module is adapted to set the oscillation frequency as the time-controlled frequency or the voltage-controlled frequency.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: December 8, 2020
    Assignee: Infineon Technologies Austria AG
    Inventors: Dong Li, Nitin Agarwal, Po-Jung Chung
  • Patent number: 10862402
    Abstract: According to various embodiments, a system and method for a power converter including an inverter and a first voltage multiplier is disclosed. The inverter is configured to convert a first DC voltage into a first AC voltage. The first voltage multiplier is coupled to an output of the inverter and configured to convert the first AC voltage into a second DC voltage higher than a peak value of the first AC voltage. The first voltage multiplier includes a plurality of stages, each stage including two diodes, and each diode in a first stage of the plurality of stages including at least one of a silicon carbide diode and a gallium nitride diode.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: December 8, 2020
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Saijun Mao
  • Patent number: 10826390
    Abstract: A power supply includes a transformer configured to transform a direct current (DC) voltage and supply an output voltage to a load. The power supply further includes circuitry configured to control the output voltage from the transformer, compare one of an average per unit time of the output voltage and an amplitude value of the output voltage with a threshold in a failure-free state when performing droop control of the output voltage, and determine whether a failure has occurred in at least one of the load and the transformer.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: November 3, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryohta Ueba, Keita Maejima
  • Patent number: 10826406
    Abstract: An alternator and a rectifier thereof are provided. The rectifier includes a rectifying transistor, a gate driving circuit and a voltage clamping circuit. The rectifying transistor generates a rectified voltage according to an input voltage and is controlled by a gate voltage. The gate driving circuit generates the gate voltage according to a difference between the rectified voltage and the input voltage. The gate driving circuit provides the gate voltage in a first time interval when the difference is less than the first predetermined threshold voltage, and makes the difference equal to the first reference voltage. The gate driving circuit adjusts the gate voltage in a second time interval and the difference is equal to the second reference voltage. In the second time interval, the voltage clamping circuit clamps the gate voltage by comparing the difference with the third reference voltage and the gate voltage with the fourth reference voltage.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: November 3, 2020
    Assignee: ACTRON TECHNOLOGY CORPORATION
    Inventors: Wei-Jing Chen, Shang-Shu Chung, Yen-Yi Chen, Huei-Chi Wang
  • Patent number: 10811983
    Abstract: The present disclosure provides a power electronic conversion unit and a power electronic conversion system. The power electronic conversion unit includes: two AC/DC subunits, AC ports of which are coupled in series to form a first port; two half-bridge subunits, DC ports of which are coupled to DC ports of the two AC/DC subunits, respectively; and a transformer, wherein two terminals of a primary winding of the transformer are coupled to a midpoint of bridge arms of the two half-bridge subunits. And a power electronic conversion system comprises a plurality of power electronic conversion units.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: October 20, 2020
    Assignee: Delta Electronics (Shanghai) CO., LTD
    Inventors: Cheng Lu, Wenfei Hu, Tao Xia
  • Patent number: 10797582
    Abstract: An apparatus comprises: a voltage converter, a first switch, a second switch, and a controller. The voltage converter includes a combination of a primary winding and an auxiliary primary winding magnetically coupled to a secondary winding. The auxiliary primary winding is operable to generate a feedback voltage signal. The secondary winding is operable to receive energy from the primary winding to produce an output voltage to power a load. The controller controls switching operation of the first switch and the second switch to control a flow of current through the primary winding. The controller is further operable to: i) via a feedback voltage signal from the auxiliary primary winding, monitor a flow of current through a body diode of the second switch, and ii) control subsequent activation of the first switch to an ON state based on the monitored flow of current through the body diode of the second switch.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: October 6, 2020
    Assignee: Infineon Technologies Austria AG
    Inventor: Alfredo Medina-Garcia
  • Patent number: 10778103
    Abstract: An apparatus for controlling a power converter includes an analog-to-digital converter to generate a digital representation of a voltage sense signal indicative of an input voltage of the power converter. The apparatus includes a first comparison circuit to generate a first comparison signal using a current sense signal indicative of a current through a primary-side switch of the power converter. The apparatus includes a gate driver to provide a gate drive signal to the primary-side switch based on a control signal, and a digital controller. The digital controller is configured to produce a time scalar value using the digital representation of the voltage sense signal, produce a timing signal using the control signal and the first comparison signal, scale the timing signal using the time scalar value, and adjust a timing of the control signal to limit a peak current through the primary-side switch based on the scaled timing signal.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: September 15, 2020
    Assignee: Silanna Asia Pte Ltd
    Inventor: Aleksandar Radic
  • Patent number: 10770975
    Abstract: A system includes an input port having an input voltage, an output port having an output voltage, and a power converter having a switch network with a plurality of power switches and a first resonant tank having a first resonant capacitor and a first resonant inductor, where at least one resonant component within the first resonant capacitor and the first resonant inductor is a switchable component configured to switch between different values. The system further includes a resonant mode selection block configured to adjust a value of the switchable component to maintain a performance of the system, and a controller configured to adjust a switching frequency or a duty cycle of the power converter.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: September 8, 2020
    Inventors: Hengchun Mao, Xuezhong Jia
  • Patent number: 10763751
    Abstract: A device and method for controlling a power converter. The device includes an activation terminal configured to obtain a first voltage based on the input voltage; a controlling terminal configured to obtain a second voltage based on the output voltage; and a digital controller configured to obtain a driving power based on the first voltage and/or the second voltage; the digital controller is configured to obtain the driving power at least based on the first voltage when the power converter is stopped. Therefore, a sufficient driving power can be provided for the digital controller even when the power converter is stopped.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: September 1, 2020
    Assignee: Sanken Electric Co., Ltd.
    Inventors: Junichi Takada, Mitsutomo Yoshinaga, Toshihiro Nakano, Koichi Shiotsu, Satoshi Funakoshi
  • Patent number: 10742121
    Abstract: A first charging path is provided for the charging of an a bootstrap capacitor that stores a driver power supply voltage for driving an active clamp switch transistor in a flyback converter. The first charging path couples charge from an active clamp capacitor to charge the bootstrap capacitor. A power supply capacitor stores a power supply voltage for a controller of a power switch for the flyback converter. A second charging path couples charge from the power supply capacitor to charge the bootstrap capacitor.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: August 11, 2020
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Wenduo Liu, Cong Zheng
  • Patent number: 10742122
    Abstract: System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes an operation-mode-selection component and a driving component. The operation-mode-selection component is configured to receive a first signal related to an output load of the power conversion system and a second signal related to an input signal received by the power conversion system and output a mode-selection signal based on at least information associated with the first signal and the second signal. The driving component is configured to receive the mode-selection signal and generate a drive signal based on at least information associated with the mode-selection signal, the driving signal corresponding to a switching frequency.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: August 11, 2020
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yuan Lin, Xiaomin Huang, Qiang Luo, Lieyi Fang
  • Patent number: 10720850
    Abstract: A series connection body wherein a first backflow prevention elements, a second backflow prevention element, a first switching element and a second switching element are connected in series in this order; a reactor; a first output capacitor connected between a first end of the series connection body and a second end of the series connection body; and a second output capacitor connected between a connection point between the first switching element and the second switching element and a connection point between the first backflow prevention element and the second backflow prevention element are provided, a DC is inputted between an end of the reactor and the second end section of the series connection body, and power is supplied to a first load connected to both ends of the first output capacitor and a second load connected to both ends of the second output capacitor.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: July 21, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shuta Ishikawa, Akihiko Iwata, Tatsuki Matsunaga
  • Patent number: 10693380
    Abstract: A controller configured for use with a power converter and a power switch comprising a primary controller coupled to the power converter and configured to provide a switch drive signal to control switching of the power switch to transfer energy from a primary side to a secondary side of the power converter. A primary switching pattern circuit is configured to provide a primary switching pattern to operate the primary controller in a first mode of operation and a primary switch control circuit is coupled to the primary switching pattern circuit and configured to receive a control signal representative of turn-on of the power switch, to receive the primary switching pattern, and to output the switch drive signal. The primary switch control circuit operates in a first mode, a second mode, and a transition, wherein the primary switch control circuit operates in the second mode after the transition has been completed.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: June 23, 2020
    Assignee: POWER INTEGRATIONS, INC.
    Inventors: Balu Balakrishnan, Alex B. Djenguerian, Sheng Liu
  • Patent number: 10651749
    Abstract: A converter includes a transformer, a main switch, an active clamping circuit, a synchronous rectifying switch and a processing circuit. The transformer includes a primary winding and a secondary winding. The main switch is coupled to the primary winding. The active clamping circuit clamps the voltage across the main switch when it is OFF. The active clamping circuit includes an auxiliary switch. The synchronous rectifying switch is coupled to the secondary winding. The processing circuit determines whether the rectifying switch is in a main conducting period or a sub conducting period according to a first voltage signal across the rectifying switch and at least one detecting signal from the converter, and generates a driving signal to control the synchronous rectifying switch accordingly.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: May 12, 2020
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Hai-Bin Song, Dao-Fei Xu, Jian Zhou, Le-Yang Yang, Qi Fu, Jin-Fa Zhang
  • Patent number: 10644526
    Abstract: A high-speed charger with a long lifespan such that a power converting inverter can be reliably stopped in accordance with a forced stop signal, without causing a malfunction. Pulse transformers corresponding respectively to switching elements configure an inverter. A control circuit outputs gate signals for switching on and off the switching elements to primary side circuits, each of which includes a primary winding of one of the pulse transformers. Gate drive circuits switch on and off of the switching elements based on voltage generated in secondary windings of the pulse transformers. Transistors acting as interruption control switching elements are interposed in the primary side circuit of each of the pulse transformers. The transistors are cut off in accordance with a forced stop signal, whereby an operation of the inverter stops.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: May 5, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Hirokazu Tajima, Osamu Takei
  • Patent number: 10608462
    Abstract: Provided are a charging system, a protection method and a power adapter. The charging system comprises: a battery, a first rectification unit, a switch unit, a transformer, a second rectification unit), a voltage sampling circuit, a control unit, and a comparator unit. The first rectification unit outputs the voltage with the first pulsating waveform. The switch unit outputs the modulated voltage with the first pulsating waveform. The transformer outputs the voltage with the second pulsating waveform. The second rectification unit outputs the voltage with the third pulsating waveform. The control unit adjusts a duty cycle of a control signal, such that the voltage of a third pulsation waveform meets the charging requirement of the battery. The comparator unit applies a comparison signal to the switch unit when the voltage sampling value is greater than the reference voltage value, so as to control the switch unit to forcibly open.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: March 31, 2020
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Chen Tian, Jialiang Zhang
  • Patent number: 10601326
    Abstract: A flyback converter is provided, which includes a transformer comprising a primary winding and a secondary winding, the transformer for transforming a power inputted from an input power supply and outputting the transformed power, a switching part having one end connected to the primary winding and the other end connected to the input power supply, and an auxiliary circuit including an auxiliary capacitor, and an auxiliary winding coupled to the primary winding. In addition, a clamping diode and a two-series connected switch structure is utilized for the switch stage to relieve the voltage stress of the switch. Accordingly, it is possible to reduce the voltage stress of the switch and also reduce the ripple of the input current which are the causes of EMI.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: March 24, 2020
    Assignees: Korea Aerospace Research Institute, Kookmin University Industry Academy Cooperation Foundation
    Inventors: Na Young Lee, Jae Dong Choi, Sang Kyoo Han, Ju Young Lee
  • Patent number: 10602586
    Abstract: A standby power consumption control device for a lighting system, includes a power factor correction module; first functional module for assisting in improving a power factor, the first functional module being located at an output end of a rectifier module of the lighting system and electrically connected to the power factor correction module; second functional module for assisting in improving a power factor, the second functional module being electrically connected to an output end of the power factor correction module; and a control module electrically connected to the first functional module, the second functional module, and the power factor correction module; the control module can control the first functional module, the second functional module, and the power factor correction module to be synchronously turned on or off according to a working state of the lighting system.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: March 24, 2020
    Assignee: Self Electronics Co., Ltd.
    Inventor: Zai Le
  • Patent number: 10587199
    Abstract: A power supply circuit includes a transformer, two load-monitoring circuits, a pulse-width modulation integrated circuit, and a burst mode control circuit. The first load-monitoring circuit is disposed on the primary side of the transformer for detecting a first current flowing through the primary side, thereby providing a corresponding first detecting voltage. The first load-monitoring circuit is configured to conduct or cut off the first current according to a control signal. The pulse-width modulation integrated circuit is configured to provide the control signal according to the first detecting voltage. The second load-monitoring circuit is disposed on the secondary side of the transformer for detecting a second current flowing through the secondary side, thereby providing a corresponding second detecting voltage. The burst mode control circuit is configured to adjust the value of the first detecting voltage according to the second detecting voltage.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: March 10, 2020
    Assignee: ACER INCORPORATED
    Inventor: Tzu-Tseng Chan
  • Patent number: 10554922
    Abstract: Provided are a method for reducing the power consumption of a power supply, a power supply capable of automatically reducing power consumption, and a television. The power supply includes: a voltage sampling circuit, an optocoupler feedback circuit, a deep standby control circuit, a power supply management circuit and an output rectifier filter. The output rectifier filter includes an output capacitor. The feedback amount (a second level or a first level) of the optocoupler feedback circuit changes as the charge amount of the output capacitor changes, intermittently controlling the power supply management circuit to stop working while achieving a constant voltage output.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: February 4, 2020
    Assignee: SHENZHEN SKYWORTH-RGB ELECTRONIC CO., LTD.
    Inventor: Jianzhong Chen
  • Patent number: 10541621
    Abstract: An AC-DC converter 1 has, e.g.: a primary winding 11 to which an alternating-current input voltage Vi is applied; a secondary winding 12 magnetically coupled with the primary winding 11; a bidirectional switch 20 connected in series with the primary winding 11; a resonance capacitor 30 connected in parallel with at least one of the bidirectional switch 20 and the primary winding 11; a resonance inductance component (e.g., a coil 120); a full-wave rectification circuit 40 performing full-wave rectification on an induced voltage appearing in the secondary winding 12; and a smoothing capacitor 50 smoothing the output of the full-wave rectification circuit 40. The alternating-current input voltage Vi is converted directly into a direct-current output voltage Vo, with both a forward voltage and a flyback voltage extracted from the secondary winding 12. The converter 1 further has a switch 200 switching the number of turns of the primary winding.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: January 21, 2020
    Assignee: Rohm Co., Ltd.
    Inventor: Hiroyuki Hatano
  • Patent number: 10516296
    Abstract: A device comprises a positive current sense apparatus having two inputs connected to a drain and a source of a power switch respectively, the positive current sense apparatus comprising a first amplifier, a first sense switch and a second sense switch, a negative current sense apparatus having two inputs connected to the drain and the source of the power switch respectively, the negative current sense apparatus comprising a second amplifier, a third sense switch and a fourth sense switch and a current sense processing apparatus connected to the positive current sense apparatus and the negative current sense apparatus respectively.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: December 24, 2019
    Assignee: x2 Power Technologies Limited
    Inventors: Sichao Liu, Jinbiao Huang, Dongdong Yuan
  • Patent number: 10511291
    Abstract: A control system (100, 200) and method (300) are provided where a first voltage domain circuit (111) and a power switch (121) operate in a first voltage domain and where a second voltage domain circuit (109) operates in a second voltage domain, where the second voltage domain circuit includes a gate driver circuit (202) for providing a control terminal driving signal (PWM1) to drive the power switch, and also includes a watchdog communication circuit (207) for scheduling watchdog communications between the first and second voltage domain circuits to be temporally separated from noise-inducing signal transitions in the control terminal driving signal.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: December 17, 2019
    Assignee: NXP USA, Inc.
    Inventors: Ibrahim S. Kandah, Fred T. Brauchler, Kim R. Gauen, David D. Putti, Vasily A. Syngaevskiy
  • Patent number: 10491139
    Abstract: A modular converter assembly has at least one AC voltage terminal and at least two DC voltage terminals. The DC voltage terminals are formed by the outer terminals of a series circuit and the AC voltage terminal is formed by the connecting node between two sub-circuits of the series circuit. Capacitors of submodules of the subcircuits are activated or deactivated based on their capacitor voltages. The capacitors are operated exclusively in a unipolar mode or exclusively in a bipolar mode. In a time period in which the temporal mean value of the current flowing through the sub-circuit has a different sign than the actual current flowing through the sub-circuit, capacitors operating in a unipolar mode are preferred over capacitors operating in a bipolar manner. That is, the unipolar capacitors are reactivated or remain activated. A selection loop is carried out repeatedly to select the capacitors for activation or deactivation.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: November 26, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Mark-Matthias Bakran, Viktor Hofmann, Andre Schoen
  • Patent number: 10483863
    Abstract: A secondary controller drives a light emitting element of a photocoupler such that a detection voltage VOUTS corresponding to an output voltage VOUT generated in an output capacitor C approximates to a reference voltage VREF. A primary controller controls a switching transistor M according to a feedback signal VFB. A protection circuit is activated and drives the light emitting element of the photocoupler when detecting an abnormal state. An auxiliary power supply circuit includes a power supply capacitor C provided separately from the output capacitor C and supplies a power supply voltage VCC to the protection circuit and an anode of the light emitting element of the photocoupler.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: November 19, 2019
    Assignee: ROHM CO., LTD.
    Inventor: Hiroki Kikuchi
  • Patent number: 10389256
    Abstract: A primary side controller for controlling a switching transistor on a primary side of an isolated DC/DC converter, includes: a low voltage state detecting circuit configured to detect a low voltage state in which an output voltage of the DC/DC converter is lower than a predetermined value; and a pulse width modulator configured to generate a pulse signal whose ON time is adjusted depending on a feedback signal from a secondary side, wherein a period of the pulse signal in the low voltage state is longer than a period of the pulse signal in a non-low voltage state in which the output voltage is higher than the predetermined value.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: August 20, 2019
    Assignee: ROHM CO., LTD.
    Inventor: Satoru Nate
  • Patent number: 10389234
    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: September 28, 2017
    Date of Patent: August 20, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yuan Lin, Lieyi Fang
  • Patent number: 10355602
    Abstract: A flyback power conversion circuit can be operated by selectively establishing and interrupting a current through a first inductance to store energy. A portion of the energy from a second inductance can be transferred to a storage device to provide an output voltage, where the second inductance is magnetically coupled to the first inductance. Information transmitted across an isolation barrier can be monitored, such as information indicative of the output voltage. The monitoring can include detecting whether information from at least two sources is consistent. An operating mode of the flyback power conversion circuit can be selected, such as response to the detecting whether the information from at least two sources is consistent, or whether valid information is being transmitted across the isolation barrier, or in response to one or more other criteria.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: July 16, 2019
    Assignee: Analog Devices Global
    Inventor: Gavin Galloway
  • Patent number: 10326371
    Abstract: Embodiments of devices, systems, and methods for controlling the output voltages and currents of a power converter as requested by an adaptive device are described. In one embodiment, a power converter includes a primary controller, a secondary controller, and an opto-coupler configured to communicate a communication request, including a load request, by a secondary controller to a primary controller in a feedback signal. A method may include the operations of: executing a request cycle, by extending an “ON” state for a secondary switch, detecting a slope change in a scaled primary voltage signal, entering a communication-ready mode, converting a load request into communication information communicated in a feedback signal using an opto-coupler, decoding the communication information, and adjusting at least one of a reference voltage for output current and a reference voltage.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: June 18, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: BongGeun Chung, Taesung Kim, Gwanbon Koo
  • Patent number: 10312017
    Abstract: A multi-phase autotransformer (10) is disclosed. The exemplary transformer includes primary windings PWA, PWB, PWC) and secondary windings (SWA1-SWA4, SWB1-SWB4, SWC1-SWC4). The primary windings are connected in a delta configuration and to a three-phase input voltage source. Each secondary winding is electrically connected to a primary winding but is magnetically coupled to a different primary winding. Three sets of secondary windings provide three three-phase outputs (350A, 350B, 350C), each of which has a voltage which is less than the three-phase input voltage, the three-phase output of each set being phase-shifted with respect to the other sets. These three sets also, collectively, provide a multi-phase output (325). Another set of secondary windings, in conjunction with the input voltage, provides another multi-phase phase output (360) which has approximately the same voltage as the three-phase input voltage.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: June 4, 2019
    Assignee: THE BOEING COMPANY
    Inventors: Jian Huang, Eugene V. Solodovnik, Kamiar J. Karimi
  • Patent number: 10312815
    Abstract: A control circuit can include: a blanking time control circuit configured to generate a blanking control signal according to a peak current of a main switch of a power stage circuit of a flyback converter; a sampling time control circuit configured to generate a sampling time control signal according to the blanking control signal and a feedback voltage signal; and a voltage detection circuit configured to receive the feedback voltage signal and the sampling time control signal, and to determine the time of detecting the feedback voltage signal according to the sampling time control signal to obtain a detection signal for controlling the main switch, where the voltage detection circuit stops detecting the feedback voltage signal when the blanking control signal is active, and the period during which the blanking control signal is active is adjustable along with the peak current.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: June 4, 2019
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Zhiliang Hu, Yongjiang Bai, Qiukai Huang, Le Li
  • Patent number: 10312712
    Abstract: The present disclosure discloses a charging system, a charging method and a power adapter. The system includes a power adapter and a terminal. The power adapter includes a first rectifier, a switch unit, a transformer, a second rectifier, a sampling unit, a control unit and a first isolation unit. The control unit outputs a control signal to the switch unit, and adjusts a duty ratio of the control signal according to a current value and/or voltage value sampled by the sampling unit, such that a third voltage with a third ripple waveform outputted by the second rectifier meets a charging requirement. The terminal includes a battery. When the terminal is coupled to the power adapter, the third voltage is applied to the battery.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: June 4, 2019
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Jialiang Zhang, Shebiao Chen, Jun Zhang, Chen Tian, Shiming Wan, Jiada Li
  • Patent number: 10298137
    Abstract: A method for frequency reduction of a quasi-resonant (QR) converter includes detecting a valley point of a resonant waveform of the QR converter, by detecting a voltage level of the resonant waveform falling below a first threshold voltage. A blanking time is formed from the beginning of a QR conversion cycle to the valley point. The blanking time is extended in response to a first reduction of an output loading of the QR converter, while maintaining a primary current of the QR converter at a first current level. The primary current is reduced to a second current level being less than the first current level, while maintaining the blanking time at a maximum blanking time, in response to a second reduction of the output loading.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: May 21, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Chien-Tsun Hsu, Li Lin, Youngbae Park
  • Patent number: 10291043
    Abstract: The present disclosure discloses a charging system, a charging method, and a power adapter. The charging system includes a battery, a first rectifier, a switch unit, a transformer, a second rectifier, a sampling unit, and a control unit. The control unit outputs a control signal to the switch unit, and adjusts a duty ratio of the control signal according to a current value and/or voltage value sampled by the sampling unit, such that a third voltage with a third pulsating waveform outputted by the second rectifier meets a charging requirement. The third voltage is applied to the battery.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: May 14, 2019
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Jialiang Zhang, Chen Tian, Jun Zhang, Shebiao Chen, Shiming Wan, Jiada Li