Patents by Inventor Tsung-Liang Hung

Tsung-Liang Hung has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250219530
    Abstract: A multi-input power system receives at least two input power sources, and includes at least two filter and rectification circuits, at least two boost PFC circuits, a DC-to-DC conversion circuit, and a control circuit. The filter and rectification circuits correspondingly receive the input power sources, and convert the input power sources into rectified voltages. The boost PFC circuits correspondingly receive the rectified voltages and perform a power factor correction on the rectified voltages to provide a conversion voltage. The DC-to-DC conversion circuit converts the conversion voltage into an output voltage. The control circuit receives power information corresponding to the input power sources and determines power supply status of the input power sources according to the power information to generate control signals. The control signals are provided to correspondingly control the boost PFC circuits to control the magnitude of the conversion voltage.
    Type: Application
    Filed: March 14, 2024
    Publication date: July 3, 2025
    Inventor: Tsung-Liang HUNG
  • Publication number: 20250219523
    Abstract: A power converter receives an input voltage. The power converter includes a boost power factor correction (PFC) circuit, a DC-to-DC conversion circuit, a bypass switch, and a comparison circuit. The comparison circuit receives the input voltage and a voltage threshold, and compares the input voltage with the voltage threshold to generate a first control signal and a second control signal. When the input voltage is greater than or equal to the voltage threshold, the first control signal turns on the bypass switch and the second control signal disables the boost PFC circuit so that the input voltage is provided to the DC-to-DC conversion circuit and is converted into an output voltage by the DC-to-DC conversion circuit.
    Type: Application
    Filed: March 14, 2024
    Publication date: July 3, 2025
    Inventor: Tsung-Liang HUNG
  • Patent number: 12323048
    Abstract: A common-mode noise cancellation circuit includes a capacitor and an inductor. The inductor has a three coupled winding, including a first coupled winding, a second coupled winding, and a third coupled winding. An input end of the first coupled winding and an input end of the second coupled winding are respectively coupled to two ends of an input power source. An input end of the third coupled winding is coupled to the output end of the second coupled winding, and an output end of the third coupled winding is coupled to the capacitor. An output end of the first coupled winding and an output end of the second coupled winding are respectively coupled to two input ends of a power conversion stage.
    Type: Grant
    Filed: July 20, 2023
    Date of Patent: June 3, 2025
    Assignee: ASIAN POWER DEVICES INC.
    Inventor: Tsung-Liang Hung
  • Publication number: 20250167673
    Abstract: A multi-input power system with an inrush current suppression function receives at least two input power sources, and includes at least two filter-rectification circuits, at least two boost PFC circuits, a current suppression circuit, and a DC-to-DC conversion circuit. Each filter-rectification circuit correspondingly receives the input power source, and converts the at least two input power sources into at least two rectified voltages. Each boost PFC circuit is correspondingly connected to the filter-rectification circuit, receives the rectified voltage, and performs a power factor correction to the rectified voltage to provide a conversion voltage. The current suppression circuit is connected to the at least two filter-rectification circuits and the at least two boost PFC circuits. The DC-to-DC is connected to the at least two boost PFC circuits and the current suppression circuit, receives the conversion voltage and converts the conversion voltage into an output voltage.
    Type: Application
    Filed: December 14, 2023
    Publication date: May 22, 2025
    Inventor: Tsung-Liang HUNG
  • Publication number: 20250167670
    Abstract: A multi-input power system receives at least two input power sources, and includes at least two filter-rectification circuits, a switching switch, a boost power factor correction circuit, a DC-to-DC conversion circuit, a determination circuit, and a switch control circuit. The at least two filter-rectification circuits correspondingly convert the at least two input power sources into at least two rectified voltages. The switching switch switches one of the at least two rectified voltages. The determination circuit receives at least two power information, and determines at least two power supply status of the at least two input power sources according to the at least two power information to generate a determination signal. The switch control circuit receives the determination signal to generate a switch control signal to control the switching switch so as to switch one of the at least two rectification voltages.
    Type: Application
    Filed: December 14, 2023
    Publication date: May 22, 2025
    Inventor: Tsung-Liang HUNG
  • Publication number: 20240396432
    Abstract: A common-mode noise cancellation circuit includes a capacitor and an inductor. The inductor has a three coupled winding, including a first coupled winding, a second coupled winding, and a third coupled winding. An input end of the first coupled winding and an input end of the second coupled winding are respectively coupled to two ends of an input power source. An input end of the third coupled winding is coupled to the input end of the second coupled winding, and an output end of the third coupled winding is coupled to the capacitor. An output end of the first coupled winding and an output end of the second coupled winding are respectively coupled to two input ends of a power conversion stage.
    Type: Application
    Filed: July 18, 2023
    Publication date: November 28, 2024
    Inventor: Tsung-Liang HUNG
  • Publication number: 20240396429
    Abstract: A common-mode noise cancellation circuit includes a capacitor and an inductor. The inductor has a three coupled winding, including a first coupled winding, a second coupled winding, and a third coupled winding. An input end of the first coupled winding and an input end of the second coupled winding are respectively coupled to two ends of an input power source. An input end of the third coupled winding is coupled to the output end of the second coupled winding, and an output end of the third coupled winding is coupled to the capacitor. An output end of the first coupled winding and an output end of the second coupled winding are respectively coupled to two input ends of a power conversion stage.
    Type: Application
    Filed: July 20, 2023
    Publication date: November 28, 2024
    Inventor: Tsung-Liang HUNG
  • Patent number: 12088194
    Abstract: A hybrid-mode power factor corrector includes a power factor correction circuit, a zero-crossing detection circuit, and a controller. The power factor correction circuit includes a power inductor and a power switch, and the zero-crossing detection circuit detects an inductor current. The controller controls the switching of the power switch by an operation frequency to control the power factor correction circuit converting an input voltage into an output voltage, and controls an input current drawn by the power factor correction circuit to follow the input voltage. The controller turns on the power switch to according to a switching time of the power switch when the power switch is switched to reach to the operation frequency and the inductor current is as low as a threshold value close to zero.
    Type: Grant
    Filed: September 23, 2022
    Date of Patent: September 10, 2024
    Assignee: ASIAN POWER DEVICES INC.
    Inventors: Tsung-Liang Hung, Shao-Hsien Chiu
  • Patent number: 11863075
    Abstract: A multi-phase boost converting apparatus includes a multi-phase boost converter and a passive lossless snubber, wherein the passive lossless snubber includes a first resonant capacitor, a second resonant capacitor, an output-end first unidirectional conduction component, an output-end second unidirectional conduction component, an input-end first unidirectional conduction component, an input-end second unidirectional conduction component and a resonant inductor.
    Type: Grant
    Filed: January 11, 2022
    Date of Patent: January 2, 2024
    Assignee: ASIAN POWER DEVICES INC.
    Inventor: Tsung-Liang Hung
  • Publication number: 20230412069
    Abstract: A hybrid-mode power factor corrector includes a power factor correction circuit, a zero-crossing detection circuit, and a controller. The power factor correction circuit includes a power inductor and a power switch, and the zero-crossing detection circuit detects an inductor current. The controller controls the switching of the power switch by an operation frequency to control the power factor correction circuit converting an input voltage into an output voltage, and controls an input current drawn by the power factor correction circuit to follow the input voltage. The controller turns on the power switch to according to a switching time of the power switch when the power switch is switched to reach to the operation frequency and the inductor current is as low as a threshold value close to zero.
    Type: Application
    Filed: September 23, 2022
    Publication date: December 21, 2023
    Inventors: Tsung-Liang HUNG, Shao-Hsien CHIU
  • Patent number: 11843319
    Abstract: An LLC resonant converting apparatus determines to operate as a half-bridge LLC resonant converter or a full-bridge LLC resonant converter based on the magnitude of the input voltage. The present disclosure can solve the problem that the input voltage range of the LLC resonant converter is not wide enough.
    Type: Grant
    Filed: October 9, 2021
    Date of Patent: December 12, 2023
    Assignee: ASIAN POWER DEVICES INC.
    Inventor: Tsung-Liang Hung
  • Patent number: 11750105
    Abstract: A full-bridge phase-shift converter with voltage clamping includes a transformer, a primary-side circuit, and a secondary-side circuit. The secondary-side circuit includes a first synchronous rectifying switch, a second synchronous rectifying switch, an output inductor, a plurality of diodes, a capacitor, an energy-releasing unit, and an output capacitor. The capacitor provides a clamping voltage. The energy-releasing unit is coupled to the capacitor in parallel, and converts the clamping voltage into an output voltage. The output capacitor is coupled to the energy-releasing unit in parallel, and provides the output voltage.
    Type: Grant
    Filed: June 9, 2022
    Date of Patent: September 5, 2023
    Assignee: ASIAN POWER DEVICES INC.
    Inventor: Tsung-Liang Hung
  • Publication number: 20230240028
    Abstract: An electronic device includes a first case, a second case, and a locking assembly. The first case includes a first fixing surface, and the first fixing surface has a locking part. The second case includes a second fixing surface and two receiving grooves, and the two receiving grooves are respectively arranged on two sides of the second fixing surface. The locking assembly includes a buckle and two elastic elements. The buckle has a hook part and fixing rods. The fixing rods are arranged on two sides of the hook part. One end of each of the fixing rods abuts against the second fixing surface and slides relative to the second fixing surface, and another end of each of the fixing rods extends into the corresponding receiving groove. The hook part is configured to buckle to the locking part.
    Type: Application
    Filed: November 15, 2022
    Publication date: July 27, 2023
    Inventors: Kun-Cheng Lee, Juei-Chi Chang, Tsung-Liang Hung, Chen-Ping Wang
  • Patent number: 11705801
    Abstract: A power supply used to convert an input voltage into an output voltage, and the power supply includes an input detection circuit, a conversion circuit, a detection circuit, and a controller. The input detection circuit provides a power good signal or a power fail signal according to the input voltage. The conversion circuit converts the input voltage into an output voltage, and the detection circuit detects the output voltage according to the power good signal to accordingly provide an output feedback signal with a first feedback value. The controller stabilizes a voltage level of the output voltage according to the first feedback value. The detection circuit self-adjusts a feedback condition according to the power fail signal, and correspondingly adjusts the output feedback signal to a second feedback value according to the feedback condition. The controller reduces the voltage level of the output voltage according to the second feedback value.
    Type: Grant
    Filed: September 16, 2021
    Date of Patent: July 18, 2023
    Assignee: ASIAN POWER DEVICES INC.
    Inventor: Tsung-Liang Hung
  • Publication number: 20230109823
    Abstract: A multi-phase boost converting apparatus includes a multi-phase boost converter and a passive lossless snubber, wherein the passive lossless snubber includes a first resonant capacitor, a second resonant capacitor, an output-end first unidirectional conduction component, an output-end second unidirectional conduction component, an input-end first unidirectional conduction component, an input-end second unidirectional conduction component and a resonant inductor.
    Type: Application
    Filed: January 11, 2022
    Publication date: April 13, 2023
    Inventor: Tsung-Liang HUNG
  • Publication number: 20230053791
    Abstract: An LLC resonant converting apparatus determines to operate as a half-bridge LLC resonant converter or a full-bridge LLC resonant converter based on the magnitude of the input voltage. The present disclosure can solve the problem that the input voltage range of the LLC resonant converter is not wide enough.
    Type: Application
    Filed: October 9, 2021
    Publication date: February 23, 2023
    Inventor: Tsung-Liang HUNG
  • Patent number: 11588510
    Abstract: A network communication power supply with digital signal isolation includes a transformer, a transformer drive circuit, a rectifier, and a modulation signal duty cycle detection circuit. The transformer has a primary side and a secondary side. The transformer drive circuit is coupled to the primary side, and receives a digital signal input. The transformer drive circuit converts the digital signal input into a drive signal with a duty cycle corresponding to a logic level of the digital signal input according to the logic level. The digital signal input includes a power content. The rectifier is coupled to the secondary side and converts the power content to provide a power source. The modulation signal duty cycle detection circuit is coupled to the rectifier and supplied power by the power source, and provides a digital signal output with a high or low level according to the duty cycle.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: February 21, 2023
    Assignee: ASIAN POWER DEVICES INC.
    Inventors: Yeu-Torng Yau, Tsung-Liang Hung
  • Publication number: 20230009315
    Abstract: A power supply used to convert an input voltage into an output voltage, and the power supply includes an input detection circuit, a conversion circuit, a detection circuit, and a controller. The input detection circuit provides a power good signal or a power fail signal according to the input voltage. The conversion circuit converts the input voltage into an output voltage, and the detection circuit detects the output voltage according to the power good signal to accordingly provide an output feedback signal with a first feedback value. The controller stabilizes a voltage level of the output voltage according to the first feedback value. The detection circuit self-adjusts a feedback condition according to the power fail signal, and correspondingly adjusts the output feedback signal to a second feedback value according to the feedback condition. The controller reduces the voltage level of the output voltage according to the second feedback value.
    Type: Application
    Filed: September 16, 2021
    Publication date: January 12, 2023
    Inventor: Tsung-Liang HUNG
  • Patent number: 11552562
    Abstract: A boost converting apparatus includes a boost converter and a passive lossless snubber, wherein the passive lossless snubber includes an input-end unidirectional conduction component, a resonant inductor, a resonant capacitor, and an output-end unidirectional conduction component. The present disclosure can solve the problems that the energy conversion efficiency of the hard-switching boost converter is poor and the structure of the soft-switching boost converter is complicated.
    Type: Grant
    Filed: October 9, 2021
    Date of Patent: January 10, 2023
    Assignee: ASIAN POWER DEVICES INC.
    Inventor: Tsung-Liang Hung
  • Patent number: 11532980
    Abstract: A conversion apparatus with overload control includes a primary conversion circuit, a resonant conversion circuit, and a control unit. The control unit controls a voltage value of a DC power source outputted from the primary conversion circuit according to a current signal of an output current of the resonant conversion circuit. When the control unit realizes that the output current exceeds a rated current according to the current signal, the control unit steps up the voltage value of the DC power source.
    Type: Grant
    Filed: September 21, 2020
    Date of Patent: December 20, 2022
    Assignee: ASIAN POWER DEVICES INC.
    Inventors: Yeu-Torng Yau, Tsung-Liang Hung