Patents Assigned to Fairchild Korea Semiconductor Ltd.
  • Dimming angle sensing circuit and driving method thereof
    Patent number: 8841850
    Abstract: The present invention relates to a dimming angle sensing circuit and a driving method thereof. A dimming angle sensing circuit according to an exemplary embodiment of the present invention uses a zener diode. The dimming angle sensing circuit generates a comparison voltage according to a comparison result of a line voltage and a zener voltage. The line voltage is generated from rectification of an AC input passed through a dimmer. The dimming angle sensing circuit generates a sense voltage corresponding to a dimming angle of the dimmer by low-pass filtering the comparison voltage.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: September 23, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Hyun-Chul Eom, Seunguk Yang, Gye-Hyun Cho
  • Clock signal generating circuit and power supply including the same
    Patent number: 8841960
    Abstract: The present invention relates to a clock signal generating circuit and a power supply including the same. The present invention includes: a counter for counting one period of an input clock signal by using a reference clock signal, and generating a count signal; and a clock signal generator for receiving the count signal and the reference clock signal, dividing the count signal to generate a quotient and a remainder, setting the quotient as a reference period of an output clock signal, and distributing and disposing the remainder to the output clock signal with a plurality of periods occurring for one period of the input clock signal.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: September 23, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Kunhee Cho, Donghwan Kim, Young-je Lee
  • SWITCH CONTROL CIRCUIT, SWITCH CONTROL METHOD AND POWER SUPPLY DEVICE USING THE SAME
    Publication number: 20140268925
    Abstract: Embodiment relates to a switch control circuit, a switch control method, and a power supply using the switch control circuit. The power supply supplies power to a load using an input voltage. The switch control circuit controls a switching operation of the power switch that controls the power supply. The switch control circuit detects a duty of the power switch using a signal for controlling the switching operation of the power switch, detects the load using the feedback voltage, and determines a short-circuit of the sense resistor according to the detected duty and the detected load.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Won-Tae LEE, Kyung-Oun JANG, Sung-Won YUN, Min-Woo LEE
  • Power Module Having Stacked Flip-Chip and Method for Fabricating the Power Module
    Publication number: 20140273349
    Abstract: Provided are a power module having a stacked flip-chip and a method of fabricating the power module. The power module includes a lead frame; a control device part including a control device chip; a power device part including a power device chip and being electrically connected to the lead frame; and an interconnecting substrate of which the control and power device parts are respectively disposed at upper and lower portions, and each of the control and power device chips may be attached to one of the lead frame and the interconnecting substrate using a flip-chip bonding method.
    Type: Application
    Filed: May 28, 2014
    Publication date: September 18, 2014
    Applicant: Fairchild Korea Semiconductor, Ltd.
    Inventors: Seung-won Lim, O-Seob Jeon, Joon-seo Son, Keun-hyuk Lee, Yun-hwa Choi
  • Hold-up time extending circuit and converter including the same
    Patent number: 8824171
    Abstract: The present invention relates to a hold-up time expansion circuit and a converter including the same. The hold-up time expansion circuit controls switching frequency of at least one switch according to the input voltage of the converter. The converter is dependent on the switching frequency that is controlled by the hold-up time expansion circuit, and controls the duty of at least one switch according to the feedback signal of the output voltage.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: September 2, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Jin-Tae Kim, Hyun-Chul Eom, Shanmei Li, Kwang-Il Lee, Hojae Lee
  • Switch control circuit, converter using the same, and switch controlling method
    Patent number: 8823339
    Abstract: The present invention relates to a switch control circuit, a switch control method, and a converter using the same. An input voltage rectified from an AC input in a converter is transmitted to an inductor, and output power is generated from an inductor current by the input voltage. The converter includes a power switch connected to the inductor to control the inductor current and a sense resistor having a first end connected to a ground and a second end connected to the AC input. At a time point that a sense voltage generated in the sense voltage reaches the peak point and then decreased to an on-reference voltage, the power switch is turned on. The on-reference voltage is a sense voltage at a resonance start time point between a parasite capacitor of the power switch and the inductor.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: September 2, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Jae-Yong Lee, Byung Kwon Choi, Young-Je Lee, Ilyong Jung
  • Switch controller and converter including the same
    Patent number: 8824182
    Abstract: The present invention relates to a switch controller and a converter including the same. The switch controller generates an oscillating voltage determining a switching frequency alternately switching a high-side switch and a low-side switch, senses a power source voltage supplied to the switch controller, and maintains the high-side switch and the low-side switch in the turn-off state in a case that the change of the power source voltage is not generated after one of the high-side switch and the low-side switch is turned off according to the oscillating voltage.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: September 2, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Hyun-Chul Eom, Jin-Tae Kim, Gyoung-Soo Park
  • VOLTAGE MEASURING APPARATUS AND BATTERY MANAGEMENT SYSTEM INCLUDING THE SAME
    Publication number: 20140239897
    Abstract: Disclosed are a voltage measuring apparatus and a battery management system including the same. The voltage measuring apparatus is connected to a plurality of battery cells connected to each other in series to measure respective voltage of the battery cells. The voltage measuring apparatus includes a first node coupled to one of an positive electrode and a negative electrode of one of a plurality of battery cells as a voltage measuring target, amplifies a voltage difference between the first node and the second node to generate an error voltage, converts the error voltage into a digital signal, and compensates for a polarity of the digital signal.
    Type: Application
    Filed: February 25, 2014
    Publication date: August 28, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Moonsik SONG, Seok HEO
  • VOLTAGE MEASURING APPARATUS AND BATTERY MANAGEMENT SYSTEM INCLUDING THE SAME
    Publication number: 20140239966
    Abstract: The voltage measuring apparatus is connected to a plurality of battery cells connected to each other in series to measure respective voltages of the battery cells. The voltage measuring apparatus includes a sample/hold amplifier configured to sample and hold positive electrode and negative electrode voltages of the battery cells to generate first and second output voltages, a differential voltage converter configured to generate a battery cell voltage according to a voltage difference between a positive input terminal and a negative input terminal, and a switching unit configured to control the first and second output voltages and connection between the positive input terminal and the negative input terminal so that a polarity of the voltage difference is constant. The sample/hold amplifier electrically insulates the switching unit from the battery cells.
    Type: Application
    Filed: February 25, 2014
    Publication date: August 28, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Moonsik SONG, Seok HEO
  • Active damper and driving method thereof
    Patent number: 8816592
    Abstract: An exemplary embodiment of the present invention relates to an active damper and a driving method thereof. An AC input passed through a dimmer is transmitted to an active damper through a rectification circuit. The active damper includes a damper resistor connected to the rectification circuit, a damper switch connected to the damper resistor in parallel, and a delay circuit delaying a turn-on time of the damper switch by a predetermined initial period from a turn-on time of the dimmer.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: August 26, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Hyun-Chul Eom, Seunguk Yang, Gye-Hyun Cho
  • LED emitting device and driving method thereof
    Patent number: 8816607
    Abstract: The present invention relates to an LED light emitting device and a driving method thereof. The LED light emitting device supplies a power supply voltage to at least two LED channels. The LED light emitting device samples channel voltages of the at least two LED channels to detect a minimum voltage from among the sampled voltages, and amplifies a difference between the detected minimum voltage and a predetermined reference voltage to generate an error amplifying signal. The LED light emitting device generates an enable signal having a duty extended by a predetermined delay period from a duty of a dimming signal for controlling light emission periods of the at least two LED channels. In this instance, the error generator is operable by the enable signal.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: August 26, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Jinhwa Chung, Byunghak Ahn, Moonho Choi, Jaewoon Kim
  • Switch control device, multi-channel converter including the same, and switch controlling method
    Patent number: 8817502
    Abstract: The present invention relates to a switch control device, a multi-channel converter including the same, and a switch control method thereof. A multi-channel converter includes at least two converters, and each converter includes at least one power switch. The multi-channel converter supplies the sum of the output power of at least two converters to the load. The switch control device generates at least two gate signals switching operation of each of at least one power switch of at least two converters. The switch control device modulates a switching frequency of at least one power switch according to the load, determines the number of phases of the multi-channel converter according to the load, and generates a gate signal for the phase difference corresponding to the number of the determined phases between at least two gate signals to be generated.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: August 26, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Jae-Eul Yeon, Won-Seok Kang
  • GATE DRIVING CIRCUIT AND BATTERY MANAGEMENT SYSTEM INCLUDING THE SAME
    Publication number: 20140225568
    Abstract: There are provided a gate driving circuit and a battery management system including the same. The gate driving circuit is coupled to a gate of a charging switch through a charging pin. The gate driving circuit includes a first transistor for performing a switching operation in accordance with a gate control signal to control a connection between a power supply voltage and a charging pin, a second transistor having a switching operation controlled in synchronization with a switching state of the first transistor and coupled between the charging pin and the first transistor, and a diode coupled between the first transistor and the second transistor and positive biased by the power supply voltage.
    Type: Application
    Filed: February 11, 2014
    Publication date: August 14, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventor: Jinhwa CHUNG
  • AUDIO JACK DETECTOR AND AUDIO JACK DETECTING METHOD
    Publication number: 20140225632
    Abstract: A jack detector detects a combination state between a socket including a detecting pin and a first signal pin and a jack. The jack detector includes a first current source for supplying a first detecting current, a second current source for supplying a second detecting current larger than the first detecting current, and a buffer for generating a detecting signal in accordance with a detecting pin voltage input from the detecting pin. The second current source instead of the first current source is connected to the detecting pin in synchronization with a combination starting point when the detecting pin and the first signal pin are electrically connected to each other and it is determined that the jack is combined with the socket when the detecting signal is maintained at a state of the combination starting point.
    Type: Application
    Filed: February 6, 2014
    Publication date: August 14, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Jae Young Oh, Hyung Seok Lee
  • Apparatus for controlling bleed switch, power supply, and method for driving power supply
    Patent number: 8803434
    Abstract: A power supply has a TRIAC dimmer, and an AC-DC converter connected to the TRIAC dimmer. The AC-DC converter has a power switch, a bleed switch, and a controller. The controller turns off the bleed switch in a first time duration and turns on the bleed switch in a second time duration. Magnitude of a current of the power switch in the first time duration is larger than magnitude of a current of the power switch in the second time duration. Magnitude of a current of the bleed switch in a third time duration within the second time duration is smaller than magnitude of a current of the bleed switch in a fourth time duration within the second time duration.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: August 12, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Seung Woo Hong, Gye-Hyun Cho, Young-Je Lee, Jae-yong Lee
  • Heat Sink Package
    Publication number: 20140217572
    Abstract: Provided are a heat sink package in which a semiconductor package and a heat sink are bound to each other and a method of fabricating the same. The heat sink package includes a heat sink having a cavity on an upper surface thereof; a metal layer formed on the bottom surface of the cavity; a solder paste layer formed on the metal layer; a substrate on the solder paste layer; and a lead and a semiconductor chip mounted on the substrate.
    Type: Application
    Filed: November 12, 2013
    Publication date: August 7, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR, LTD.
    Inventors: Joo-Yang Eom, O-seob Jeon, Seung-Won Lim, Seung-Yong Choi
  • Complex semiconductor packages and methods of fabricating the same
    Patent number: 8796831
    Abstract: Disclosed are complex semiconductor packages, each including a large power module package which includes a small semiconductor package, and methods of manufacturing the complex semiconductor packages. An exemplary complex semiconductor package includes a first package including: a first packaging substrate; a plurality of first semiconductor chips disposed on the first packaging substrate; and a first sealing member covering the first semiconductor chips on the first packaging substrate; and at least one second package separated from the first packaging substrate, disposed in the first sealing member, and including second semiconductor chips.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: August 5, 2014
    Assignee: Fairchild Korea Semiconductor, Ltd.
    Inventors: Gwi-gyeon Yang, Seung-won Lim
  • Semiconductor device including power-on reset circuit
    Patent number: 8797071
    Abstract: A semiconductor device including a power-on-reset (POR) circuit. The semiconductor device includes a driving voltage generator configured to generate a first voltage that rises at a first slope and subsequently rises at a second slope greater than the first slope and a first POR signal generator configured to receive the first voltage and generate a first POR signal having a first ramp-up time.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: August 5, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Jung-ho Lee, Hyun-soo Bae, Won-hi Oh, Jong-mu Lee
  • Duty adjuster circuit and converter including the same
    Patent number: 8792255
    Abstract: A converter supplies output power according to a first output current and a second output current generated according to each switching operation of a first switch and a second switch. A duty adjuster circuit generates an adjuster current to compensate the difference between the peak of the first output current and the peak of the second output current to adjust duty of the first and second switches.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: July 29, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Jin-Tae Kim, Kwang-Il Lee
  • COMMUNICATION DEVICE
    Publication number: 20140198873
    Abstract: An exemplary embodiment relates to a communication device. A communication device includes: a transmitting unit generating a first analog signal and a second analog signal based on an input signal; and a receiving unit including a first capacitor having a first terminal to which the first analog signal is input and a second capacitor having a first terminal to which the analog signal is input. The receiving unit constantly controls a reference voltage electrically coupled with a second terminal of the first capacitor and a second terminal of the second capacitor, and generating an output signal based on a result of comparison between a first pulse signal generated at the second terminal of the first capacitor and a second pulse signal generated at the second terminal of the second capacitor.
    Type: Application
    Filed: January 15, 2014
    Publication date: July 17, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Kyoungmin LEE, Jaehyun HAN, Ikgyoo SONG