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Fairchild Korea Semiconductor Ltd
Fairchild Korea Semiconductor Ltd_20100107
Fairchild Korea Semiconductor Ltd_20100128

Fairchild Korea Semiconductor Ltd patents


Recent patent applications related to Fairchild Korea Semiconductor Ltd. Fairchild Korea Semiconductor Ltd is listed as an Agent/Assignee. Note: Fairchild Korea Semiconductor Ltd may have other listings under different names/spellings. We're not affiliated with Fairchild Korea Semiconductor Ltd, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "F" | Fairchild Korea Semiconductor Ltd-related inventors


Charge pump and switch control circuit

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... Fairchild Korea Semiconductor Ltd

Resonant converter and driving method thereof

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... Fairchild Korea Semiconductor Ltd

Variable blanking frequency for resonant converters

A power supply includes a transistor that is connected to a primary winding of a transformer. A controller controls a switching operation of the transistor by quasi-resonant switching. The controller receives a feedback voltage and adjusts the feedback voltage to adjust a blanking frequency, which is an inverse of a... Fairchild Korea Semiconductor Ltd

Led driver circuit and led driving method

A light emitting diode (LED) driver circuit includes an LED string and a conducting state detection circuit. The conducting state detection circuit detects a conducting state of the LED string, and generates a discharge control signal upon sensing that the LED string is in a non-conducting state. A current source... Fairchild Korea Semiconductor Ltd

Pulse generator and driving circuit comprising the same

A pulse generator includes a first inverter configured to inverse an input pulse and output a result, a second inverter configured to inverse the output of the first inverter and output a result, a clamp inverter configured to generate a clamping voltage by clamping the output of the second inverter... Fairchild Korea Semiconductor Ltd

Light emitting diode control circuit with wide range input voltage

A light emitting diode (LED) control circuit includes an inductor current sense circuit with a high-side diode string, a low-side diode string, and a sense resistor in series with and between the high-side and low side diode strings. The LED control circuit receives an input voltage on an end that... Fairchild Korea Semiconductor Ltd

Light emitting diode control circuit with hysteretic control and low-side output current sensing

An LED control circuit controls a switching operation of a switch by hysteretic control. The LED control circuit includes a controller integrated circuit (IC) that senses a current sense voltage from a current sense resistor that is on a low-side of the switch. The LED control circuit senses the current... Fairchild Korea Semiconductor Ltd

Overload protection for power converter

A method includes comparing a value of a current sense signal indicating an output signal of a power converter to a value of a threshold signal, adjusting a value of a first count signal in response to the comparison result, and determining whether or not the power converter is operating... Fairchild Korea Semiconductor Ltd

Controlling output voltage for power converter

A method includes generating a first feedback signal in response to a tracking signal indicating an output signal of the power converter. The method further includes detecting an overshoot of the tracking signal or an undershoot of the tracking signal, generating a second feedback signal in response to the detection... Fairchild Korea Semiconductor Ltd

System and controlling output signal of power converter

A method includes generating a first gain control signal and a second gain control signal in response to a gain transition signal indicating a transition of a power converter from a first gain mode to a second gain mode. The method further includes causing the power converter to enter the... Fairchild Korea Semiconductor Ltd

Multiple linear regulation

A circuit comprises an amplifier and a plurality of channels, the plurality of channels including respective transistors. The respective transistors of the channels control respective magnitudes of respective currents of the channels according to an output of the amplifier. The respective transistors of the plurality of channels may be included... Fairchild Korea Semiconductor Ltd

Led driving device

A LED driving device is provided, which includes a LED string including at least one LED element, at least one channel connected to the at least one LED element, a current regulator configured to regulate a current flowing through the at least one channel according to at least one corresponding... Fairchild Korea Semiconductor Ltd

Signal calculator

Examples of a signal calculator include a voltage multiplier and a time divider. The voltage multiplier copies time information corresponding to a first voltage and generates a third voltage using a second current corresponding to a second voltage during a first period corresponding to the copied time information. The time... Fairchild Korea Semiconductor Ltd

Resonant converter and driving method thereof

A resonant converter includes a first switch on a primary side and a second switch coupled to the first switch, a first synchronous rectification switch on a secondary side conducted according to a switching operation of the first switch, a second synchronous rectification switch on the secondary side conducted according... Fairchild Korea Semiconductor Ltd

Bi-directional transmitter/receiver comprising temperature sensor and driving circuit comprising the same

A bi-directional transmitter/receiver according to an embodiment includes a pin connected with a main control circuit, a transistor connected with a first electrode to the pin, a Schmitt trigger which determines an output according to a voltage of the pin, and a temperature sensor which is connected to the pin... Fairchild Korea Semiconductor Ltd

Active clamp flyback converter

An active clamp flyback converter includes a low-side switch that serves as a power switch and a high-side switch that serves as a clamp switch. The high-side switch is operated in one of two active clamp switching modes, which is selected based on load condition. In a complementary active clamp... Fairchild Korea Semiconductor Ltd

Power device and manufacturing the same

Provided are a power device having an improved field stop layer and a method of manufacturing the same. The method can include performing a first ion implant process by implanting impurity ions of a first conductive type into a front surface of a semiconductor substrate to form an implanted field... Fairchild Korea Semiconductor Ltd

Phase-cut pre-regulator and power supply comprising the same

A power supply includes a phase-cut pre-regulator. The phase-cut pre-regulator comprises a switching device connected between a line voltage and an input voltage of a bulk capacitor and a comparator receiving the line voltage and a reference voltage, comparing the line voltage with hysteresis reference voltages based on the reference... Fairchild Korea Semiconductor Ltd

Led lighting circuit with ripple reducer

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... Fairchild Korea Semiconductor Ltd

Circuit board with thermal paths for thermistor

A circuit board for an electronic device includes pattern areas on both sides of the circuit board. Each end of a thermistor is electrically connected to electrically conductive pads on pattern areas on the top and bottom sides of the circuit board. An input plug is electrically connected to an... Fairchild Korea Semiconductor Ltd

Planar transformer with multilayer circuit board

A planar transformer includes a magnetic core and a multilayer printed circuit board. A primary winding of the planar transformer is formed by winding traces on several layers of the printed circuit board. A layer of the printed circuit board that has a winding trace of the primary winding has... Fairchild Korea Semiconductor Ltd

Power factor correction circuit and driving method thereof

Provided is a power factor correction circuit including an inductor having one end to which an input voltage is applied; a power switch connected between another end of the inductor and the ground, and configured to control an output of the power factor correction circuit; and a power factor correction... Fairchild Korea Semiconductor Ltd

Switch control circuit including multipin to set dead time information and/or protection mode

A switch control circuit includes a first pin connected to a first voltage, and a second pin connected to another end of a first resistor including an end connected to the first pin and a first capacitor. In the switch control circuit, at least two of first dead time information,... Fairchild Korea Semiconductor Ltd

Led driving circuit, led device comprising the same, and driving led

A light emitting diode (LED) driving circuit disclosed herein controls a switching operation of a power switch connected to an LED string and includes a reference voltage generator configured to generate a frequency modulation reference voltage according to a dimming signal that controls brightness of the LED string, and a... Fairchild Korea Semiconductor Ltd

Reference voltage generator and light emitting diode device comprising the same

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... Fairchild Korea Semiconductor Ltd

Power semiconductor device

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... Fairchild Korea Semiconductor Ltd

Power device and fabricating method thereof

In one general aspect, a method of fabricating a power device can include preparing a semiconductor substrate of a first conductivity type, and forming a first Field Stop (FS) layer and a second FS layer.... Fairchild Korea Semiconductor Ltd

Superjunction semiconductor device and manufacturing the same

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... Fairchild Korea Semiconductor Ltd

Power-on reset circuit and under-voltage lockout circuit comprising the same

An UVLO circuit according to an aspect of the present invention includes: a power-on reset (POR) circuit generating an output based on a first current that flows according to an increase of a power supply voltage and not operating in a normal state of the power supply voltage; and a... Fairchild Korea Semiconductor Ltd








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