Patents by Inventor Nien-Hui Kung

Nien-Hui Kung 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: 20160268836
    Abstract: An apparatus for performing hybrid power control in an electronic device includes a charger positioned in the electronic device, and the charger is arranged for selectively charging a battery of the electronic device. In addition, at least one portion of the charger is implemented within a charger chip. For example, the charger may include: a plurality of terminals that are positioned on the charger chip, where the plurality of terminals may include a third terminal and a fourth terminal; a plurality of switching units, positioned on the charger chip; and a control circuit, positioned on the charger chip and coupled to the plurality of switching units. The third terminal and the fourth terminal may be arranged for installing an inductor, where the inductor may be utilized by the charger when the control circuit configures the charger into any of at least two hardware configurations within a plurality of hardware configurations.
    Type: Application
    Filed: May 18, 2016
    Publication date: September 15, 2016
    Inventors: Nien-Hui Kung, Chien-Wei Kuan, Yen-Hsun Hsu
  • Publication number: 20160233712
    Abstract: An apparatus for performing hybrid power control in an electronic device includes a charger positioned in the electronic device, and the charger is arranged for selectively charging a battery of the electronic device. In addition, at least one portion of the charger is implemented within a charger chip. For example, the charger may include: a first terminal, positioned on the charger chip; a second terminal, positioned on the charger chip and selectively coupled to the first terminal; a third terminal, positioned on the charger chip and selectively coupled to the second terminal; a fourth terminal, positioned on the charger chip and coupled to the third terminal; a first power output path, coupled to the fourth terminal, arranged for providing a first voltage level; and a second power output path, coupled to the third terminal, arranged for selectively providing a second voltage level that is greater than the first voltage level.
    Type: Application
    Filed: October 25, 2015
    Publication date: August 11, 2016
    Inventor: Nien-Hui Kung
  • Publication number: 20160229303
    Abstract: An apparatus for performing hybrid power control in an electronic device includes a charger positioned in the electronic device, and the charger is arranged for selectively charging a battery of the electronic device. In addition, at least one portion of the charger is implemented within a charger chip. For example, the charger may include: a first terminal, positioned on the charger chip; a second terminal, positioned on the charger chip and selectively coupled to the first terminal; a third terminal, positioned on the charger chip and selectively coupled to the second terminal; a fourth terminal, positioned on the charger chip and coupled to the third terminal; a first power output path, coupled to the fourth terminal, arranged for providing a first voltage level; and a second power output path, coupled to the third terminal, arranged for selectively providing a second voltage level that is greater than the first voltage level.
    Type: Application
    Filed: June 15, 2015
    Publication date: August 11, 2016
    Inventor: Nien-Hui Kung
  • Patent number: 9160194
    Abstract: The present invention discloses a bi-directional switching regulator and a control circuit of the bi-directional switching regulator. The bi-directional switching regulator includes a power stage, an operation circuit, and a power path management circuit. The operation circuit generates a first operation signal to control a boost conversion operation or a buck conversion operation of the power stage. The power path management circuit includes a power path switch electrically connected between the output terminal and the battery, for controlling a charging operation from the output terminal to the battery. The operation circuit generates the first operation signal so that: (1) the output voltage is determined by a sum of a safety offset and the battery voltage; or (2) the output voltage is determined by a higher one between a predetermined voltage level and the sum of the safety offset and the battery voltage.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: October 13, 2015
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Nien-Hui Kung
  • Patent number: 9158314
    Abstract: The present invention discloses a method for controlling a voltage regulator, including steps of: converting an input voltage to an output voltage and providing an output current; sensing the output current; reducing the output voltage; and when the reduction of the output voltage causes the output current to change, setting the output voltage back to a value which does not change the output current.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: October 13, 2015
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Nien-Hui Kung, Wei-Chung Chang
  • Patent number: 9153992
    Abstract: The present invention discloses a power bank circuit. The power bank circuit includes a charger circuit, a battery circuit, a power conversion circuit, a temperature detecting circuit and a current distribution circuit. The charger circuit receives an input voltage and provides a charging current to the battery circuit. The power conversion circuit converts a battery voltage to an output voltage and provides an output current. The temperature detecting circuit detects the temperature of the packaged structure. When the temperature of the packaged structure exceeds a first predetermined temperature, the current distribution circuit first reduces the output current. When the temperature of the packaged structure exceeds a second predetermined temperature, the current distribution circuit then reduces the charging current.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: October 6, 2015
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Nien-Hui Kung
  • Patent number: 9153977
    Abstract: The present invention discloses a bi-directional switching regulator and a control circuit thereof. The bi-directional switching regulator includes a power stage, an operation circuit controlling the power stage, and a power path management circuit. The power path management circuit includes a power path switch electrically connected between the output terminal and the battery, and a power path controller controlling the power path switch. The operation circuit generates the operation signal according to the output voltage or a battery voltage of the battery, and the charging current, so that: (1) a voltage difference between the output voltage and the battery voltage is ICHG*R, wherein ICHG represents the charging current and R represents a conduction resistance when the power path switch is fully conductive; or (2) the output voltage is determined by a higher one of a predetermined voltage level and the sum of ICHG*R plus the battery voltage.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: October 6, 2015
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Nien-Hui Kung
  • Publication number: 20150229153
    Abstract: The present invention discloses a power management circuit, and a control circuit and a control method thereof. The power management circuit converts an input voltage at an input terminal to an output voltage at an output terminal, and charges a battery from the output terminal. The present invention detects a power supplying capability of the input terminal to generate an adjustment signal, and adjusts the output voltage according to the adjustment signal.
    Type: Application
    Filed: February 8, 2014
    Publication date: August 13, 2015
    Applicant: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Nien-Hui Kung
  • Publication number: 20150214736
    Abstract: The present invention discloses a control method for supplying power, including (a) determining whether a power-receiving device requires power and whether the power supply apparatus is coupled to the charging node; (b) when both questions of step (a) are determined yes, determining whether a power supply capability of the power supply apparatus is higher than a current threshold; (c) when it is determined yes in step (b), supplying power from the power supply apparatus to the power-receiving device; (d) when it is determined no in step (b), determining whether a charge storage quantity of the battery is higher than a threshold; (e) when it is determined yes in step (d), supplying power from the battery to the power-receiving device; and (f) when it is determined no in step (d), supplying power from the power supply apparatus to the battery.
    Type: Application
    Filed: January 28, 2014
    Publication date: July 30, 2015
    Applicant: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Nien-Hui Kung
  • Patent number: 9007035
    Abstract: A charge control circuit supplies power from an external power source to a first common node and charges a second common node. A regulator circuit is coupled between the external power source and the first common node, and a transistor is coupled between the first common node and the second common node. A current sensing and control device senses the current from the first common node to the second common node and generates a first control signal. A first voltage sensing and control device senses a voltage at the first common node, and generates a conduction control signal to control the transistor. A second voltage sensing and control device senses a voltage at the second common node, and generates a second control signal. The regulator circuit provides system power to the first common node according to the first control signal and the second control signal.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: April 14, 2015
    Assignee: Richtek Technology Corporation
    Inventor: Nien-Hui Kung
  • Publication number: 20150042298
    Abstract: The present invention discloses a buck switching regulator including a power stage, a driver circuit and a bootstrap capacitor. The power stage includes an upper-gate switch, a lower-gate switch and an inductor. The upper-gate switch is electrically connected between an input terminal and a switching node. The lower-gate switch is electrically connected between the switching node and ground. The bootstrap capacitor is electrically connected between a boost node and the switching node, wherein the boost node is electrically connected to a voltage supply. When a voltage across the bootstrap capacitor is smaller than a reference voltage, the lower-gate switch is turned on to charge the bootstrap capacitor from the voltage supply. When the charging operation to the bootstrap capacitor has been conducted over a predetermined time period or when the current of the inductor has reached a predetermined value, the charging operation to the bootstrap capacitor is ceased.
    Type: Application
    Filed: April 5, 2014
    Publication date: February 12, 2015
    Applicant: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Nien-Hui Kung, Chia-Hsiang Ling, Yu-Huei Lee
  • Publication number: 20150035493
    Abstract: The present invention discloses a bi-directional switching regulator and a control circuit thereof. The bi-directional switching regulator includes a power stage, an operation circuit controlling the power stage, and a power path management circuit. The power path management circuit includes a power path switch electrically connected between the output terminal and the battery, and a power path controller controlling the power path switch. The operation circuit generates the operation signal according to the output voltage or a battery voltage of the battery, and the charging current, so that: (1) a voltage difference between the output voltage and the battery voltage is ICHG*R, wherein ICHG represents the charging current and R represents a conduction resistance when the power path switch is fully conductive; or (2) the output voltage is determined by a higher one of a predetermined voltage level and the sum of ICHG*R plus the battery voltage.
    Type: Application
    Filed: August 2, 2013
    Publication date: February 5, 2015
    Applicant: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Nien-Hui Kung
  • Publication number: 20150002097
    Abstract: The present invention discloses a bi-directional switching regulator and a control circuit of the bi-directional switching regulator. The bi-directional switching regulator includes a power stage, an operation circuit, and a power path management circuit. The operation circuit generates a first operation signal to control a boost conversion operation or a buck conversion operation of the power stage. The power path management circuit includes a power path switch electrically connected between the output terminal and the battery, for controlling a charging operation from the output terminal to the battery. The operation circuit generates the first operation signal so that: (1) the output voltage is determined by a sum of a safety offset and the battery voltage; or (2) the output voltage is determined by a higher one between a predetermined voltage level and the sum of the safety offset and the battery voltage.
    Type: Application
    Filed: June 27, 2013
    Publication date: January 1, 2015
    Applicant: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Nien-Hui Kung
  • Patent number: 8917062
    Abstract: The present invention discloses a charge control circuit for supplying power from an external power source to a first common node and charging a second common node from the first common node. A regulator circuit is coupled between the external power source and the first common node, and a transistor is coupled between the first common node and the second common node. The present invention detects an operation parameter of the transistor and controls an internal voltage source to generate a non-predetermined voltage difference accordingly. When the sum of the voltage at the second common node and the non-predetermined voltage is equal to or higher than the reference voltage, the voltage at the first common node is regulated to a level higher than the voltage at the second common node, and the transistor is in an optimum conductive state.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: December 23, 2014
    Assignee: Richtek Technology Corporation
    Inventors: Chien-Ping Lu, Nien-Hui Kung, Li-Wei Lee, Chia-Hsiang Lin, Chen-Hsiang Hsiao, Ko-Ching Su
  • Publication number: 20140361730
    Abstract: The present invention discloses a bi-directional switching regulator and a control circuit of the bi-directional switching regulator. The bi-directional switching regulator includes a single power stage, an operation circuit, a power path management circuit and a power path controller. The power path management circuit includes a first power path switch and a second power path switch to be coupled to at least two batteries respectively, so that at least two batteries can be charged by the output voltage supplied by the single power stage.
    Type: Application
    Filed: June 6, 2013
    Publication date: December 11, 2014
    Applicant: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Nien-Hui Kung
  • Publication number: 20140354050
    Abstract: The present invention discloses a power bank and a control method for supplying power. The power bank includes a rechargeable battery, a charging switch for controlling a charging path to the rechargeable battery, a discharging switch for controlling a discharging path from the rechargeable battery, and a control circuit for controlling the charging switch and the discharging switch according to current information of the charging path, current information of the discharging path, and battery capacity information of the rechargeable battery. The power bank is adapted for being connected in series between a power supply apparatus and a load. The control method detects the supply current from the power supply apparatus and the current required by the load to determine the charging and discharging operations of the power bank.
    Type: Application
    Filed: May 31, 2013
    Publication date: December 4, 2014
    Applicant: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Nien-Hui Kung, Hsuan-Kai Wang
  • Patent number: 8890485
    Abstract: A charger circuit comprising: a charging path coupled between an input voltage and a battery; a power switch on the charging path; a switch control circuit controlling the power switch; a timer counting a charging period; and a low current control circuit issuing a signal to the switch control circuit to control the power switch such that a charging current is maintained to be a predetermined low current when the timer counts to a predetermined maximum charging period.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: November 18, 2014
    Assignee: Richtek Technology Corporation, R.O.C.
    Inventors: Nien-Hui Kung, Kwan-Jen Chu
  • Publication number: 20140320091
    Abstract: In a control method for supplying power, a first power regulator supplies a first current and an output voltage to a second power regulator and the second power regulator supplies a second current to a load. The method includes: increasing the output voltage and detecting the second current; determining whether the second current suddenly drops as the output voltage increases; when the second current drops, defining a level of the output voltage which corresponds to a starting point of the sudden drop as an upper limit; when the output voltage increases but the second current neither increases nor suddenly drops, defining a level of the output voltage corresponding to a point where the second current stops increasing as a lower limit; and setting the output voltage to be lower than or equal to the upper limit, and higher than or equal to the lower limit.
    Type: Application
    Filed: April 22, 2014
    Publication date: October 30, 2014
    Applicant: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Nien-Hui Kung
  • Publication number: 20140312855
    Abstract: The present invention discloses a multi-purpose power management chip and a power path control circuit. The multi-purpose power management chip includes: a switch circuit including at least one power transistor; a switch control circuit for generating a first switch signal to control an operation of the power transistor to thereby control the power conversion between an input terminal and an output terminal; a power path management circuit for controlling the charging operation from the output terminal to the battery; a current source for supplying a current to the battery; and a path selection circuit for determining whether the charging operation to the battery is controlled by the power path management circuit and the current source or not according to whether a power path power transistor is provided on the power path or not.
    Type: Application
    Filed: April 18, 2013
    Publication date: October 23, 2014
    Applicant: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Nien-Hui Kung
  • Patent number: 8836294
    Abstract: The present invention discloses a switching regulator, a control circuit and a control method therefor. The switching regulator comprises an upper gate switch, a lower gate switch, and an inductor connected to a switching node. When a current passing through the upper gate switch or the inductor is lower than a threshold, the lower gate switch is kept OFF until a next cycle, and during the cycle wherein the lower gate switch is OFF, the upper gate switch is turned ON for a period of time.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: September 16, 2014
    Assignee: Richtek Technology Corporation, R.O.C.
    Inventor: Nien-Hui Kung