Patents Assigned to Fairchild Korea Semiconductor Ltd.
  • CLOCK SIGNAL GENERATING CIRCUIT AND POWER SUPPLY INCLUDING THE SAME
    Publication number: 20140077859
    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: Application
    Filed: November 25, 2013
    Publication date: March 20, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Kunhee CHO, Donghwan KIM, Young-je LEE
  • Power semiconductor device and methods for fabricating the same
    Patent number: 8674402
    Abstract: A power semiconductor device includes: a drain region of a first conductive type; a drift region of a first conductive type formed on the drain region; a first body region of a second conductive type formed below an upper surface of the drift region; a second body region of a second conductive type formed below the upper surface of the drift region and in the first body region; a third body region of a second conductive type formed by protruding downwards from a lower end of the first body region; a source region of a first conductive type formed below the upper surface of the drift region and in the first body region; and a gate insulating layer formed on channel regions of the first body region and on the drift region between the first body regions.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: March 18, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Jin-myung Kim, Se-woong Oh, Jae-gil Lee, Young-chul Choi, Ho-cheol Jang
  • Switch controller, switch control method, converter using the same, and driving method thereof
    Patent number: 8670252
    Abstract: Disclosed are a switch controller, a switch control method, a converter using the same, and a driving method thereof. A first voltage is generated by using a voltage that is input to an input terminal, and a soft start signal is generated by using the first voltage during a soft start duration. A switching operation is controlled by using the soft start signal during the soft start duration.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: March 11, 2014
    Assignee: Fairchild Korea Semiconductor, Ltd.
    Inventors: Jin-Tae Kim, Gwan-Bon Koo, Hang Seok Choi
  • SWITCH CONTROL CIRCUIT, CONVERTER INCLUDING THE SAME AND DRIVING METHOD THEREOF
    Publication number: 20140049236
    Abstract: Disclosed are a switch control circuit, a converter including the same, and a driving method thereof. The converter includes an inductor for storing energy of an input end and providing the same to an output end, a first switch coupled between the inductor and a ground, and a switch control circuit for controlling the first switch by comparing a ramp voltage that corresponds to a current that flows through the first switch and a first voltage that corresponds to an output voltage of the output end. The switch control circuit compares the ramp voltage and the first reference voltage to change the slope of the ramp voltage.
    Type: Application
    Filed: August 12, 2013
    Publication date: February 20, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Jae-Yong LEE, Ji-Hoon JANG, Young-Je LEE
  • SWITCH CONTROL DEVICE, POWER SUPPLY DEVICE COMPRISING THE SAME, AND DRIVING METHOD OF POWER SUPPLY DEVICE
    Publication number: 20140043879
    Abstract: The present invention relates to a switch controller, a power supply including the same, and a method for driving the same. An AC input of the power supply is connected to a rectification circuit. The power supply includes a power switch to which an input current passed through the rectification circuit flows during an on-period and a switch controller, the switch controller detects a half-on time point that is the intermediate time point of the on-period, detects a sense voltage that is determined by a current flowing to the power switch during the on-period at the half-on time point, generates a modulation wave by controlling a reference wave according to the detected voltage, and controls switching operation of the power switch according to the modulation wave.
    Type: Application
    Filed: August 13, 2013
    Publication date: February 13, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Hyun-Chul EUM, Seung-Uk YANG
  • PIEZOELECTRIC DRIVING CIRCUIT AND PIEZOELECTRIC DRIVING METHOD
    Publication number: 20140042935
    Abstract: A piezoelectric driving circuit and a driving method thereof are provided. The piezoelectric driving circuit drives a piezoelectric circuit by using a first driving switch connected to one end of a piezoelectric circuit, a second driving switch corresponding to the first driving switch and connected to the other end of the piezoelectric circuit, and a sensing resistor for sensing a current flowing in the piezoelectric circuit. A fire angle and a duty cycle of an upper switch are adjusted such that a peak of a sense voltage generated in the sensing resistor at a timing at which the first driving switch is turned on, in a state in which the second driving switch is turned on.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 13, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Gwanbon KOO, Youngsik LEE, Youngbae PARK
  • PIEZOELECTRIC DRIVING CIRCUIT AND DRIVING METHOD THEREOF
    Publication number: 20140042871
    Abstract: A piezoelectric driving circuit generates a first PWM output according to a result of comparison between a ramp signal and a reference sinewave and generates a second PWM according to a result of comparison between the ramp signal and an inverse reference sinewave of the reference sinewave. The switching operation of the first and third switches of the piezoelectric driving circuit are controlled according to the first PWM output and the switching operation of the second and fourth switches of the piezoelectric driving circuit are controlled according to the second PWM output during a first cycle of the reference sinewave and the inverse reference sinewave. The switching operation of the first and third switches are controlled according to the second PWM output and the switching operation of the second and fourth switches are controlled according to the first PWM output during the next second cycle.
    Type: Application
    Filed: August 10, 2013
    Publication date: February 13, 2014
    Applicant: Fairchild Korea Semiconductor Ltd.
    Inventors: Youngsik LEE, Eunsung JANG
  • Switch control device
    Patent number: 8648644
    Abstract: The switch control device controls a switching operation of a power switch. The switch control device includes an auxiliary power device. The auxiliary power device includes a parasitic capacitor, and charges the parasitic capacitor by receiving a power voltage to generate an auxiliary power voltage. The switch control device includes a control pulse generator driven by the auxiliary power voltage and generating a set pulse and a reset pulse according to an input signal that is input for controlling the switching operation of the power switch. The switch control device generates a gate signal that turns on the power switch by being synchronized with the set pulse and generates a gate signal that turns off the power switch by being synchronized with the reset pulse.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: February 11, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Kunhee Cho, Sung-Yun Park, Donghwan Kim
  • SEMICONDUCTOR DEVICE INCLUDING POWER-ON RESET CIRCUIT
    Publication number: 20140021985
    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: Application
    Filed: September 27, 2013
    Publication date: January 23, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Jung-ho LEE, Hyun-soo BAE, Won-hi OH, Jong-mu LEE
  • Control device, LED light emitting device including the same, and control method
    Patent number: 8633660
    Abstract: The present invention relates to a switching operation control device of a power switch, an LED light emitting device including the same, and a control method thereof. The control device detects a zero crossing time when a voltage at an input end of the power switch becomes a zero voltage, generates a reference signal that is synchronized with the voltage at the input end of the power switch by using the detected zero crossing time, and compensates the generated reference signal with a first voltage that is greater than the zero voltage during a blocking period corresponding to the zero crossing time.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: January 21, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Gye-Hyun Cho, Min-Ho Jung, Sung-Yun Park, Dong-Hwan Kim
  • Switch control device, power supply device comprising the same and switch control method
    Patent number: 8634211
    Abstract: A power voltage required to operate the switch control device is generated by using full-wave current rectification voltage generated by rectifying an AC input. A zero cross-point is detected when a full-wave rectification voltage is zero voltage by using the power voltage. A reference signal synchronized to the full-wave rectification voltage is generated by using the detected zero cross-point. A switching operation of a power switch is controlled by comparing a reference signal with current that flows on the power switch.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: January 21, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Young-Je Lee, Gye-Hyun Cho
  • POWER SUPPLY DEVICE
    Publication number: 20140009973
    Abstract: An exemplary embodiment of the present invention relates to a power supply. A power supply according to an exemplary embodiment of the present invention includes: a filter capacitor coupled to a line to which an input voltage rectified from an AC input passed through a dimmer is supplied; a discharge switch coupled to the filter capacitor through the line; and a main switch receiving the input voltage and controlling power transmission. The power supply performs input voltage control to shape the input voltage with a predetermined pattern and controls a switching operation time of the main switch.
    Type: Application
    Filed: June 18, 2013
    Publication date: January 9, 2014
    Applicant: Fairchild Korea Semiconductor Ltd.
    Inventors: Hyun-Chul EOM, Young-Jong KIM, In-Ki PARK
  • POLY SILICON RESISTOR, REFERENCE VOLTAGE CIRCUIT COMPRISING THE SAME, AND MANUFACTURING METHOD OF POLY SILICON RESISTOR
    Publication number: 20140008765
    Abstract: The present invention relates to a polysilicon resistor, a reference voltage circuit including the same, and a method for manufacturing the polysilicon resistor. The polysilicon resistor according includes a first polysilicon resistor and at least one of second polusilicon resistors, coupled to the first polysilicon resistor in series. The first polysilicon resistor and the at least one of the second polysilicon resistors are P-type polysilicon, and a doping concentration of the first polysilicon resistor is different from a doping concentration of the at least one of the second polysilicon resistors. The polysilicon resistor formed by serially coupling the first polysilicon resistor and the at least one of the second polysilicon resistors is applied with a constant current such that a reference voltage or a constant voltage is generated.
    Type: Application
    Filed: September 12, 2013
    Publication date: January 9, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventor: Jung-Hyun CHOI
  • Soft-burst circuit for switched-mode power supplies
    Patent number: 8625308
    Abstract: A switched-mode power supply includes a soft-burst circuit to minimize or prevent distracting audible noise. The power supply includes a control circuit for controlling switching of an output transistor to deliver a regulated output voltage to a load. The control circuit adjusts the operating frequency of the power supply based on a control signal. The soft-burst circuit discharges a storage device to minimize or prevent audible noise when the control signal reaches a particular level.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: January 7, 2014
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Jin-Tae Kim, Kwang-Il Lee, Gwan-Bon Koo
  • Power factor correction circuit and driving method thereof
    Patent number: 8618747
    Abstract: The present invention relates to a power factor correction circuit and a driving method thereof. The power factor correction circuit refers to an inductor receiving an input voltage and supplying output power, a power switch connected to the inductor and controlling an inductor current flowing in the inductor, and an auxiliary coil coupled with the inductor with a predetermined turn ratio. The power factor correction circuit controls the output power by controlling a switching operation of the power switch, and counts the number of times that the inductor current reaches a predetermined maximum current to turn off the power switch when the count result reaches a predetermined short circuit threshold count.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: December 31, 2013
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Young-Bae Park, Sang Cheol Moon, Byoung Heon Kim, Hyung Min Kim
  • DIMMING ANGLE SENSING CIRCUIT, DIMMING ANGLE SENSING METHOD, AND POWER SUPPLY DEVICE COMPRISING THE DIMMING ANGLE SENSING CIRCUIT
    Publication number: 20130342125
    Abstract: A dimming angle sense circuit according to an exemplary embodiment of the present invention generates a source current that depends on an auxiliary voltage corresponding to an input voltage during a turn-on period of a power switch for a period during which an input is generated according to a dimming angle. The dimming angle sense circuit generates a dimming sense voltage by mirroring the source current, and generates a sampling voltage by sampling a dimming sense voltage for every turn-on period of a power switch. The dimming angle sense circuit generates a dimming signal by supplying a dimming current to a dimming resistor and a dimming capacitor according to a result of comparison between the sampling voltage and a reference voltage.
    Type: Application
    Filed: June 18, 2013
    Publication date: December 26, 2013
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Hyun-Chul EOM, Yong-Sang SHIN
  • Clock signal generating circuit and power supply including the same
    Patent number: 8610480
    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: February 17, 2012
    Date of Patent: December 17, 2013
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Kunhee Cho, Donghwan Kim, Young-Je Lee
  • Heat sink package
    Patent number: 8604606
    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: Grant
    Filed: July 28, 2010
    Date of Patent: December 10, 2013
    Assignee: Fairchild Korea Semiconductor, Ltd.
    Inventors: Joo-yang Eom, O-seob Jeon, Seung-won Lim, Seung-yong Choi
  • Pulse width filter
    Patent number: 8598911
    Abstract: The present invention relates a pulse width filter generating a modulation signal that is increased in synchronization with one of an increasing edge and a decreasing edge of the input signal and is decreased in synchronization with the other of the increasing edge and the decreasing edge, and transmitting the input signal of the modulation signal. The input signal passed through the filter unit is inverted thereby being an output signal. The pulse width filter controls the increasing and the decreasing of the modulation signal according to the output signal and the input signal passed through the filter unit, and the modulation signal is a signal to determined whether the pulse width of the input signal is more than the predetermined cut-off pulse width.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: December 3, 2013
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Sung-Yun Park, Kunhee Cho, Dong-Hwan Kim
  • SWITCH CONTROL DEVICE, POWER SUPPLY DEVICE COMPRISING THE SAME, AND DRIVING METHOD OF POWER SUPPLY DEVICE
    Publication number: 20130314961
    Abstract: The present invention relates to a switch controller, a power supply including the same, and a driving method thereof. An AC input of the power supply is connected to a rectification circuit. The power supply includes a power switch to which the AC input passed through the rectification circuit flows during a turn-on period of the power switch and a switch controller detecting a half-on time point that is an intermediate time point of the turn-on period, calculating the AC current using a result of sampling a sense voltage that depends on a current flowing to the power switch during the turn-on period at the half-on time point and the turn-on period, and controlling the input current to have a reference sine wave. The reference sine wave has a sine wave that is full-wave rectified from the AC input.
    Type: Application
    Filed: May 24, 2013
    Publication date: November 28, 2013
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventors: Hyun-Chul EOM, Seung-Uk YANG