Patents Assigned to Fairchild Korea Semiconductor Ltd.
  • Patent number: 10135263
    Abstract: A method is provided comprising: detecting a connection between an electronic device and a battery charger; transmitting to the battery charger a first request for at least one of a first voltage level and a first current level; receiving from the battery charger a signal; and charging a battery of the electronic device with the signal.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: November 20, 2018
    Assignees: Samsung Electronics Co., Ltd, Fairchild Korea Semiconductor Ltd.
    Inventors: Ku-Chul Jung, Erik Wilson Maier, Oscar Freitas, Kisun Lee, Chul-Eun Yun, Kwang-Sub Lee
  • Publication number: 20180138152
    Abstract: In a general aspect, a circuit assembly apparatus can include first and second semiconductor die, and a substrate. The substrate can include an insulating layer; a first metal layer disposed on a first side of the insulating layer, a first side of the first semiconductor die disposed on and electrically coupled with the first metal layer; a second metal layer disposed on a second side of the insulating layer, the second side of the insulating layer being opposite the first side of the insulating layer, a first side of the second semiconductor die being disposed on and electrically coupled with the second metal layer; and a conductive via disposed through the insulating layer, the conductive via electrically coupling the first metal layer with the second metal layer, the first metal layer, the conductive via and the second metal layer electrically coupling the first semiconductor die with the second semiconductor die.
    Type: Application
    Filed: October 25, 2017
    Publication date: May 17, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Mankyo JONG, Changyoung PARK
  • Publication number: 20180123580
    Abstract: A power supply device includes a power switch that is switched according to a gate voltage. A sense resistor receives a switch current that flows through the power switch to develop a sense voltage. A peak of a primary-side current is detected from the sense voltage.
    Type: Application
    Filed: September 28, 2017
    Publication date: May 3, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Taesung KIM, Seunguk YANG, Inki PARK
  • Publication number: 20180122725
    Abstract: In a general aspect, an apparatus can include a semiconductor die, a substrate, and a leadframe coupled to the substrate. The apparatus can include a conductive clip coupled to the semiconductor die. The leadframe can be disposed between the semiconductor die and the substrate, and the semiconductor die can be disposed between the conductive clip and the leadframe.
    Type: Application
    Filed: October 11, 2017
    Publication date: May 3, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Seungwon IM, Mankyo JONG, Joonseo SON, Oseob JEON
  • Patent number: 9947742
    Abstract: A power semiconductor device includes: a substrate; an anode electrode and a cathode electrode disposed on the substrate; a well region disposed inside the substrate in a lower portion of the anode electrode, and having p-type conductivity; an NISO region disposed in a lower portion of the well region inside the substrate, and having a first n-type impurity concentration; and an n-type buried layer disposed in a lower portion of the NISO region, and having a second impurity concentration greater than the first n-type impurity concentration, inside the substrate.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: April 17, 2018
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Hye-mi Kim, Sun-hak Lee
  • Publication number: 20180097449
    Abstract: A method for controlling a power converter includes determining whether a value of a feedback signal is in a first range, detecting a plurality of points of the feedback signal, and decreasing one or both of a proportional coefficient and an integral coefficient of a first control loop of the power converter at a first plurality of times corresponding to the detected plurality of points of the feedback signal when the value of the feedback signal is in the first range. The feedback signal indicates an output signal of the power converter. A circuit for controlling a power converter includes a transient detector that generates a transient detection signal in response to a feedback signal indicating an output signal of the power converter and a gain selector that generates a gain selection signal in response to the transient detection signal.
    Type: Application
    Filed: September 18, 2017
    Publication date: April 5, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Jintae KIM, Hangseok CHOI, Taesung KIM, Sangcheol MOON
  • Publication number: 20180098398
    Abstract: A phase-cut dimming control system according to the embodiment includes a phase angle detector configured to detect a phase angle of an input voltage generated by phase-cut dimming, a feedback signal generator configured to generate a first reference signal corresponding to the detected phase angle, and generate an initial feedback signal based on a detection signal corresponding to power supplied to a load and the first reference signal, a feedback signal modulator configured to modulate the initial feedback signal and generate a feedback signal, a power transmission controller configured to generate a control signal which controls power transmission according to the feedback signal, and a power transmission circuit configured to transmit power to the load according to the control signal.
    Type: Application
    Filed: December 7, 2017
    Publication date: April 5, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Hyunchul EUM, Youngjong KIM, Kuo-Hsien HUANG, Chih-Chun CHUANG, Young Mo YANG, Young Je LEE, Moon Ho CHOI, Moon Sik SONG
  • Publication number: 20180090481
    Abstract: An electrostatic discharge circuit may include a substrate, an N+ buried layer in the substrate, an n-type epitaxial layer on the N+ buried layer and the substrate, a first P? region in an anode region of the n-type epitaxial layer, a first N+ region in the first P? region, an N-well in a cathode region of the n-type epitaxial layer, a first P+ region in the N-well, and a second N+ region located in the N-well. The first N+ region may be located closer to the second N+ region than the first P+ region.
    Type: Application
    Filed: July 19, 2017
    Publication date: March 29, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR, LTD.
    Inventor: Junhyeong RYU
  • Patent number: 9917503
    Abstract: A power factor correction circuit includes an overcurrent protection circuit, and the overcurrent protection circuit detects at least one of a line input voltage, a switch current of a power factor correction circuit, and a line period peak and performs overcurrent protection operations using a detection result.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: March 13, 2018
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Taesung Kim, Gwanbon Koo
  • Publication number: 20180054133
    Abstract: According to an implementation, a resonant converter for resonant capacitance stabilization during start-up includes an oscillator configured to generate a first clock signal to drive a first driver for a first power switch, and a second clock signal to drive a second driver for a second power switch during switching operations, and a resonant capacitor stabilizer configured to control the second driver to periodically activate the second power switch to discharge a resonant capacitor of a resonant network during initialization of the switching operations of the resonant converter.
    Type: Application
    Filed: August 4, 2017
    Publication date: February 22, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Sangcheol MOON, Jintae KIM, Hangseok CHOI
  • Publication number: 20180054865
    Abstract: A lighting circuit includes a light emitting diode (LED), a transistor that controls a current through the LED, and a controller integrated circuit (IC) that controls the transistor to vary a brightness of the LED. The controller IC has a dimming pin that receives a hybrid dimming signal from a dimming input circuit. The dimming input circuit receives pulse width modulation (PWM) dimming signals and generates the hybrid dimming signal as a PWM dimming signal, an analog dimming signal, or both depending on the received PWM dimming signals.
    Type: Application
    Filed: July 20, 2017
    Publication date: February 22, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Seunguk YANG, Hyunchul EUM, Eungwoo LEE
  • Publication number: 20180054864
    Abstract: A lighting circuit includes a light emitting diode (LED), a transistor that controls a current through the LED, and a lighting controller integrated circuit (IC) that controls the transistor to vary a brightness of the LED. The controller IC has a dimming pin that receives a dimming signal. The controller IC generates a low reference threshold and a high reference threshold that follow the dimming signal. The lighting controller IC controls the transistor by hysteretic control by comparing a sense signal indicative of the current through the LED to the low reference threshold and the high reference threshold.
    Type: Application
    Filed: July 20, 2017
    Publication date: February 22, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Seunguk YANG, Moonsik SONG, Hyunchul EUM
  • Publication number: 20180054134
    Abstract: According to an implementation, a resonant converter for burst mode control includes an oscillator configured to control switching operations of at least one power switch, and a burst mode controller configured to control a burst mode by determining a start of a burst pulse of the burst mode using a first internal signal and determining an end of the burst pulse of the burst mode using a second internal signal. The burst mode controller is configured to stop the switching operations during the burst pulse.
    Type: Application
    Filed: August 4, 2017
    Publication date: February 22, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Sangcheol MOON, Jintae KIM, Hangseok CHOI
  • Publication number: 20180054111
    Abstract: According to an implementation, a resonant converter for detecting non-zero voltage switching includes an oscillator configured to generate a first clock signal to drive a first power switch, and a second clock signal to drive a second power switch. The resonant converter includes a non-zero voltage switching (non-ZVS) detection circuit configured to receive an integrated current sense signal sensed on a primary side of a transformer of a resonant network, and determine a polarity of a voltage of the integrated current sense signal at a predetermined point in the first clock signal or the second clock signal during a switching cycle. The non-ZVS detection circuit is configured to detect a non-ZVS event based on the polarity of the voltage of the integrated current sense signal at the predetermined point in the first clock signal or the second clock signal during the switching cycle.
    Type: Application
    Filed: August 4, 2017
    Publication date: February 22, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Sangcheol MOON, Jintae KIM, Hangseok CHOI
  • Publication number: 20180054130
    Abstract: According to an implementation, a resonant converter for short-circuit protection includes an oscillator, a short-circuit detector configured to detect a short-circuit condition in a component of the resonant converter, and a pulse width modulation (PWM) controller configured to control the oscillator in a PWM mode before short-circuit protection is triggered. The oscillator, when in the PWM mode, is configured to generate a first clock signal for driving a first power switch and a second clock signal for driving a second power switch.
    Type: Application
    Filed: August 4, 2017
    Publication date: February 22, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Sangcheol MOON, Jintae KIM, Hangseok CHOI
  • Patent number: 9900948
    Abstract: A reference voltage generator disclosed herein includes an amplifier including two input terminals connected to a dimming signal and a first node, respectively, and an output terminal, a first transistor including a gate connected to the output terminal of the amplifier and one electrode connected to the first node, second and third transistors configured to form a current mirror, and two resistors connected between one electrode of the second transistor and one electrode of the first transistor.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: February 20, 2018
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Minwoo Lee, Moonsik Song
  • Patent number: 9900938
    Abstract: A light emitting diode (LED) lighting circuit includes a ripple reducer. The ripple reducer includes a ripple detector, an adaptive offset generator, and a linear regulator. The ripple detector generates a ripple voltage that is indicative of a ripple current. The adaptive offset generator generates an adaptive offset voltage from the ripple voltage and from a voltage of a transistor. The linear regulator drives the transistor to regulate an LED current in accordance with a reference control voltage that is generated from the ripple voltage and the adaptive offset voltage.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: February 20, 2018
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Jintae Kim, Hyunchul Eum, Inki Park, Eungwoo Lee
  • Publication number: 20180048227
    Abstract: A charge pump includes: a first diode that is connected to a first node; a second diode that is connected to a second node; a pump capacitor that is connected to a third node to which the first diode and the second diode are connected; a power supply capacitor that is connected to the pump capacitor; a third diode that is connected between the pump capacitor and the power supply capacitor; and a zener diode that is connected in parallel to the third diode and the power supply capacitor. A power supply device decreases a ripple of an output current using a ripple reduction signal.
    Type: Application
    Filed: October 30, 2017
    Publication date: February 15, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Taesung KIM, Dong-Jin PARK, Seung-Uk YANG
  • Patent number: 9887280
    Abstract: A superjunction semiconductor device includes a first semiconductor layer doped with a first conductivity type; an active region formed on the first semiconductor layer, the active region including a drift layer; and a termination region disposed to surround the active region, the termination region including a lower edge region disposed on a side surface of the drift layer and an upper edge region disposed on the lower edge region, wherein the upper edge region includes a lower charge balance region disposed on the lower edge region, the lower charge balance region having a second conductivity type different from the first conductivity type, and an upper charge balance region disposed on the lower charge balance region, the upper charge balance region having the first conductivity type.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: February 6, 2018
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Kwang-won Lee, Hye-min Kang, Jae-gil Lee
  • Publication number: 20180034261
    Abstract: A resonant converter includes a first switch on the primary side and a second switch coupled to the first switch, a synchronization rectification switch on a secondary side configured to conduct during a conduction period in response to a switching operation of the first switch, and a switch control circuit configured to determine an operating region of the resonant converter to be below resonance based on a result of a comparison between the conduction period and an on period of the first switch.
    Type: Application
    Filed: October 11, 2017
    Publication date: February 1, 2018
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Won-Tae LEE, Ji-Hoon JANG, Hyeong Seok BAEK, Hang-Seok CHOI