Patents by Inventor Chih-Hua Hou

Chih-Hua Hou 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).

  • Patent number: 10523032
    Abstract: A charging apparatus includes a DC switch circuit, a wireless power unit, a capacitive power conversion unit, and a switching power conversion unit. The charging apparatus operates in at least one of the following modes: in a constant current mode, the capacitive power conversion unit converts a bus current provided by the DC switch circuit or the wireless power unit to generate a predetermined constant charging current on a charging node to charge a battery; in a constant voltage mode, the switching power conversion unit converts a bus voltage provided by the DC switch circuit or the wireless power unit to generate a predetermined charging voltage on the charging node to charge the battery; in a first power output mode, the switching power conversion unit converts the battery voltage to generate an output voltage on a transmission interface pin.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: December 31, 2019
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Wei-Jen Huang, Chih-Hua Hou, Fu-Chi Lin
  • Patent number: 10177576
    Abstract: A charger circuit for providing a charging current and voltage to a battery includes a power delivery unit, a capacitive power conversion circuit and a reverse blocking switch circuit. The power delivery unit converts an input power to a DC voltage and current. The capacitive power conversion circuit includes a conversion switch circuit including plural conversion switches coupled with one or more conversion capacitors, and a conversion control circuit. The DC current is regulated to a predetermined DC current level, and the conversion control circuit controls the connections of the plural conversion capacitors such that the charging current is scaled-up of the predetermined DC current level substantially by a current scale-up factor. The reverse blocking switch circuit is coupled in series with the capacitive power conversion circuit. The body diode of the reverse blocking switch is reversely coupled to the body diode of the conversion switch.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: January 8, 2019
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Wei-Jen Huang, Shui-Mu Lin, Tsung-Wei Huang, Chih-Hua Hou
  • Publication number: 20180375362
    Abstract: A charging apparatus includes a DC switch circuit, a wireless power unit, a capacitive power conversion unit, and a switching power conversion unit. The charging apparatus operates in at least one of the following modes: in a constant current mode, the capacitive power conversion unit converts a bus current provided by the DC switch circuit or the wireless power unit to generate a predetermined constant charging current on a charging node to charge a battery; in a constant voltage mode, the switching power conversion unit converts a bus voltage provided by the DC switch circuit or the wireless power unit to generate a predetermined charging voltage on the charging node to charge the battery; in a first power output mode, the switching power conversion unit converts the battery voltage to generate an output voltage on a transmission interface pin.
    Type: Application
    Filed: June 12, 2018
    Publication date: December 27, 2018
    Inventors: Wei-Jen Huang, Chih-Hua Hou, Fu-Chi Lin
  • Publication number: 20180083459
    Abstract: A charger circuit for providing a charging current and voltage to a battery includes a power delivery unit, a capacitive power conversion circuit and a reverse blocking switch circuit. The power delivery unit converts an input power to a DC voltage and current. The capacitive power conversion circuit includes a conversion switch circuit including plural conversion switches coupled with one or more conversion capacitors, and a conversion control circuit. The DC current is regulated to a predetermined DC current level, and the conversion control circuit controls the connections of the plural conversion capacitors such that the charging current is scaled-up of the predetermined DC current level substantially by a current scale-up factor. The reverse blocking switch circuit is coupled in series with the capacitive power conversion circuit. The body diode of the reverse blocking switch is reversely coupled to the body diode of the conversion switch.
    Type: Application
    Filed: June 26, 2017
    Publication date: March 22, 2018
    Inventors: Wei-Jen Huang, Shui-Mu Lin, Tsung-Wei Huang, Chih-Hua Hou
  • Patent number: 8680824
    Abstract: The present invention discloses an inverter circuit and a method for supplying an inverted voltage. The method for supplying an inverted voltage comprises: providing a power switch and an inductor electrically connected with each other; driving the gate of the power switch by a driver gate, such that an input voltage is converted to a negative voltage supplied to a load; and providing a low operation voltage to the driver gate according to the negative voltage.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: March 25, 2014
    Assignee: Richtek Technology Corporation
    Inventors: Tsan-Huei Wu, Chun-Hsiung Chang, Chih-Hua Hou, Chiu-Yi Chi
  • Publication number: 20100134088
    Abstract: The present invention discloses an inverter circuit and a method for supplying an inverted voltage. The method for supplying an inverted voltage comprises: providing a power switch and an inductor electrically connected with each other; driving the gate of the power switch by a driver gate, such that an input voltage is converted to a negative voltage supplied to a load; and providing a low operation voltage to the driver gate according to the negative voltage.
    Type: Application
    Filed: July 10, 2009
    Publication date: June 3, 2010
    Inventors: Tsan-Huei Wu, Chun-Hsiung Chang, Chih-Hua Hou, Chiu-Yi Chi