Patents by Inventor Ching-Jan Chen

Ching-Jan Chen 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: 20250119995
    Abstract: The present invention discloses a boost converter power stage circuit, comprising: an organic light-emitting diode power management integrated circuit unit, a switched capacitor converter, and a boost converter, wherein, a flying capacitor is used to boost the voltage of the inductor to twice the voltage, and then the positive voltage of the output voltage source is boosted, and then use the switched capacitor converter to output the voltage in order to obtain the conversion of the negative voltage.
    Type: Application
    Filed: January 8, 2024
    Publication date: April 10, 2025
    Inventors: Ching-Jan Chen, Chieh-Ju Tsai, Sheng-Han Yu
  • Publication number: 20250079997
    Abstract: The present invention provides an isolated power supply having a fast output response, comprising an isolated power supply and a control unit. The isolated power supply includes a primary side power-stage unit, a secondary side power-stage unit, and an isolation transformer, and the control unit includes a primary side control unit, a secondary side control unit, and a photo-coupling isolation unit.
    Type: Application
    Filed: March 27, 2024
    Publication date: March 6, 2025
    Inventors: Yuan-Chih LIN, Xiao-Ze LIN, Ching-Jan CHEN
  • Publication number: 20240313632
    Abstract: A power converter includes a power stage, a feedback circuit, a ramp generator and a controller. The power stage generates a pulse width modulation signal for forming an output voltage. The controller includes a comparator, a control logic circuit, an on-time generator and an off-time generator. The comparator generates a comparison signal according to a compensation signal from the feedback circuit and a ramp signal from the ramp generator. The control logic circuit generates a first trigger signal according to the comparison signal and an off-time pulse signal. The on-time generator generates a duty signal according to the first trigger signal. The duty signal is transmitted to the power stage for controlling a duty cycle ratio of the pulse width modulation signal. The off-time generator generates the off-time pulse signal according to the duty signal and transmits the off-time pulse signal to the control logic circuit.
    Type: Application
    Filed: August 10, 2023
    Publication date: September 19, 2024
    Inventors: Ching-Jan CHEN, Chieh-Ju TSAI, Ching-Yang WU
  • Patent number: 12088198
    Abstract: A power stage circuit generates an output signal according to an input signal and a control signal. A ramp generator circuit generates a ramp signal according to the control signal, the input signal, and the output signal. A calculation circuit generates a calculation signal according to the output signal and a reference signal. The calculation circuit operates in a first mode when the power converter operates in a light loading state, and the calculation circuit operates in a second mode when the power converter operates in a normal state. A control circuit generates the control signal according to the calculation signal and the ramp signal. The control circuit includes a comparator circuit and a control signal generator. The comparator circuit generates a comparison signal according to the calculation signal and the ramp signal. The control signal generator generates the control signal according to the comparison signal.
    Type: Grant
    Filed: December 30, 2021
    Date of Patent: September 10, 2024
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Chieh-Ju Tsai, Ching-Jan Chen, Zhen-Guo Ding, Zhe-Hui Lin, Wei-Ling Chen
  • Patent number: 11973425
    Abstract: A power converter includes a power stage circuit, a ramp generator circuit, and a control circuit. The power stage circuit generates an output signal according to an input signal and a control signal. The ramp generator circuit generates a ramp signal according to the control signal, the input signal, and the output signal. The control circuit generates the control signal according to the output signal, a reference signal, and the ramp signal.
    Type: Grant
    Filed: December 29, 2021
    Date of Patent: April 30, 2024
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Chieh-Ju Tsai, Ching-Jan Chen, Zhen-Guo Ding, Zhe-Hui Lin, Wei-Ling Chen
  • Publication number: 20220271662
    Abstract: A power stage circuit generates an output signal according to an input signal and a control signal. A ramp generator circuit generates a ramp signal according to the control signal, the input signal, and the output signal. A calculation circuit generates a calculation signal according to the output signal and a reference signal. The calculation circuit operates in a first mode when the power converter operates in a light loading state, and the calculation circuit operates in a second mode when the power converter operates in a normal state. A control circuit generates the control signal according to the calculation signal and the ramp signal. The control circuit includes a comparator circuit and a control signal generator. The comparator circuit generates a comparison signal according to the calculation signal and the ramp signal. The control signal generator generates the control signal according to the comparison signal.
    Type: Application
    Filed: December 30, 2021
    Publication date: August 25, 2022
    Inventors: Chieh-Ju TSAI, Ching-Jan CHEN, Zhen-Guo DING, Zhe-Hui LIN, Wei-Ling CHEN
  • Publication number: 20220271661
    Abstract: A power converter includes a power stage circuit, a ramp generator circuit, and a control circuit. The power stage circuit is configured to generate an output signal according to an input signal and a control signal. The ramp generator circuit is configured to generate a ramp signal according to the control signal, the input signal, and the output signal. The control circuit is configured to generate the control signal according to the output signal, a reference signal, and the ramp signal.
    Type: Application
    Filed: December 29, 2021
    Publication date: August 25, 2022
    Inventors: Chieh-Ju TSAI, Ching-Jan CHEN, Zhen-Guo DING, Zhe-Hui LIN, Wei-Ling CHEN
  • Patent number: 10581319
    Abstract: The present invention provides a LLC resonant converter with magnetic-flux balance control circuit. The LLC resonant converter comprises a primary-side circuit and a secondary-side circuit, wherein the control loop of secondary-side circuit comprises a voltage control unit, a digital pulse-width-modulation generation unit, and the control loop of primary-side circuit comprises a DC detection unit, a balance control unit, a digital pulse-width-modulation generation unit.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: March 3, 2020
    Assignee: NATIONAL TAIWAN UNIVERSITY
    Inventors: Yuan-Chih Lin, Ching-Jan Chen
  • Publication number: 20190386540
    Abstract: An alternator apparatus and a voltage converter thereof are provided. The voltage converter includes a voltage converting circuit and an auxiliary circuit. The voltage converting circuit has a first power end, a second power end and an inductor. The voltage converting circuit converts a first voltage on the first power end to generate a second voltage on the second power end during an operation time period, or the voltage converting circuit converts the second voltage on the second power end to generate the first voltage on the first power end during the operation time period. The auxiliary circuit forms a first loop between the first power end and the inductor during a reset time period, or forms a second loop between the second power end and the inductor during the reset time period, or forms a third loop in the auxiliary circuit.
    Type: Application
    Filed: September 17, 2018
    Publication date: December 19, 2019
    Applicant: ACTRON TECHNOLOGY CORPORATION
    Inventors: Chia-Sung Yu, Ching-Jan Chen, Yuan-Chih Lin
  • Patent number: 9287774
    Abstract: A power converter control circuit includes a feedback circuit and a pulse width modulation signal generating circuit for configuring a power stage circuit to provide power to a load. The feedback circuit generates a first gain signal and a second gain signal according to an output voltage sensing signal coupled with the load. The feedback circuit further generates a feedback signal according to the first gain signal and the second gain signal. The pulse width modulation signal generating circuit configures the operation of the power stage circuit according to the feedback signal and a reference signal. Moreover, the feedback circuit and the pulse width modulation signal generating circuit are configured on the same integrated circuit package.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: March 15, 2016
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Ching-Jan Chen, Shao-Hung Lu, Jian-Rong Huang
  • Publication number: 20140253084
    Abstract: A power converter control circuit includes a feedback circuit and a pulse width modulation signal generating circuit for configuring a power stage circuit to provide power to a load. The feedback circuit generates a first gain signal and a second gain signal according to an output voltage sensing signal coupled with the load. The feedback circuit further generates a feedback signal according to the first gain signal and the second gain signal. The pulse width modulation signal generating circuit configures the operation of the power stage circuit according to the feedback signal and a reference signal. Moreover, the feedback circuit and the pulse width modulation signal generating circuit are configured on the same integrated circuit package.
    Type: Application
    Filed: March 11, 2014
    Publication date: September 11, 2014
    Applicant: Richtek Technology Corporation
    Inventors: Ching-Jan CHEN, Shao-Hung LU, Jian-Rong HUANG
  • Patent number: 8525497
    Abstract: For a multiphase interleaved voltage regulator, an offset cancellation circuit is applied for each phase separately. The current loop gain of each phase is thus increased to mitigate the beat-frequency oscillation in phase currents when the beat frequency is below the bandwidth of the low-pass filter in the offset cancellation circuit, without introducing additional instability issue that is the drawback of increasing current-sensing gain.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: September 3, 2013
    Assignee: Rickhtek Tecnology Corp.
    Inventors: Chen-Hua Chiu, Ching-Jan Chen, Dan Chen, Wei-Hsu Chang
  • Patent number: 8134353
    Abstract: The present invention discloses a multi-phase power converter, and a control circuit and a control method of the multi-phase power converter. The multi-phase power converter comprises multiple power conversion phases. The method comprises: determining whether to enter a phase-shedding mode; at a first time when entering the phase-shedding mode, disabling at least one of the power conversion phases; and at another time when entering the phase-shedding mode, disabling at least another one of the power conversion phases.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: March 13, 2012
    Assignee: Richtek Technology Corporation, R.O.C.
    Inventors: Ching-Jan Chen, Chun-Shih Huang, Kuo-Lung Tseng, Dan Chen
  • Publication number: 20110187341
    Abstract: For a multiphase interleaved voltage regulator, an offset cancellation circuit is applied for each phase separately. The current loop gain of each phase is thus increased to mitigate the beat-frequency oscillation in phase currents when the beat frequency is below the bandwidth of the low-pass filter in the offset cancellation circuit, without introducing additional instability issue that is the drawback of increasing current-sensing gain.
    Type: Application
    Filed: February 1, 2011
    Publication date: August 4, 2011
    Applicant: RICHTEK TECHNOLOGY CORP.
    Inventors: CHEN-HUA CHIU, CHING-JAN CHEN, DAN CHEN, WEI-HSU CHANG
  • Publication number: 20100225288
    Abstract: The present invention discloses a multi-phase power converter, and a control circuit and a control method of the multi-phase power converter. The multi-phase power converter comprises multiple power conversion phases. The method comprises: determining whether to enter a phase-shedding mode; at a first time when entering the phase-shedding mode, disabling at least one of the power conversion phases; and at another time when entering the phase-shedding mode, disabling at least another one of the power conversion phases.
    Type: Application
    Filed: July 2, 2009
    Publication date: September 9, 2010
    Inventors: Ching-Jan Chen, Chun-Shih Huang, Kuo-Lung Tseng, Dan Chen