Abstract: The present invention relates to an oscillator that is capable of realizing duty balancing. The oscillator determines a switching frequency of a converter converting an input voltage according to a switching operation of switches to generate an output voltage. The oscillator determines a first half cycle of a duty signal determining the switching frequency by using a reference current according to a feedback signal corresponding to the output voltage. The oscillator senses a first half cycle period by using an output of the frequency setting unit, and determines the same period as the first half cycle as a second half cycle of the duty signal after the first half cycle.

Abstract: A semiconductor package including a package substrate; a semiconductor chip on the package substrate; a first via contact on the package substrate; a second via contact on the semiconductor chip; a metal wiring, which is arranged on the first via contact and the second via contact and interconnects the first via contact and the second via contact; a first encapsulating material which is arranged between the metal wiring and the package substrate and encapsulates the semiconductor chip, the first via contact, and the second via contact; and a second encapsulating material which encapsulates the first encapsulating material and the metal wiring.

Abstract: The present invention related to a switch control circuit, a coupled inductor boost converter including the same, and a driving method thereof. The coupled inductor boost converter includes a first inductor connected between an input voltage and a first node, a second inductor connected between the first node and a second node, and a power switch connected between the first node and a ground, and a switch control circuit. The switch control circuit receives a voltage of the second node and turn on the power switch by using the voltage of the second node at a time when a voltage of the first node becomes a zero voltage.

Abstract: The power supply device includes a power switch including one terminal to which an input voltage is transferred; an inductor including one terminal connected to another terminal of the power switch; a diode connected between a ground and a floating ground; a sensing resistor connected between the floating ground and the one terminal of the inductor. A switch controller compares a modulation sensing voltage depending on a sensing voltage generated from the sensing resistor with a high peak reference and a low peak reference when a LED string is connected between an inductor and the ground. The switch controller controls a switching operation of a power switch according to the comparison result. The high peak reference and the low peak reference are references for controlling an upper limit and a lower limit of an LED current flowing through the LED string, respectively.

Abstract: An exemplary embodiment of the present invention generates a plurality of clock signals having a frequency according to an output voltage, a plurality of low clock signals of which frequencies are half of frequencies of the plurality of clock signals, and a phase signal corresponding to the output voltage by subtracting an average phase error from a count signal sampled by being synchronized with a reference clock signal from the count result of a first clock signal having the earliest phase among the plurality of clock signals. The average phase error is generated according to a comparison result of a first low clock signal corresponding to the first clock signal and each of other low clock signals among the plurality of low clock signals by being synchronized with the reference clock signal.

Abstract: The present invention relates to a piezoelectric circuit, a piezoelectric driving circuit driving the piezoelectric circuit, and a method for driving the piezoelectric circuit. The piezoelectric circuit includes a sub-piezoelectric circuit and an external inductor coupled in parallel with the sub-piezoelectric circuit. The external inductor discharges the sub-piezoelectric circuit when a polarity of a piezoelectric voltage, that is, a both-end voltage of the piezoelectric circuit is inverted. The piezoelectric driving circuit includes first and third switches connected to a first node of the piezoelectric circuit and second and fourth switches connected to a second node of the piezoelectric circuit.

Abstract: A power device, which has a Field Stop (FS) layer based on a semiconductor substrate between a collector region and a drift region in an FS-IGBT structure, wherein the thickness of the FS layer and the impurity density of the collector region are easy to adjust and the FS layer has an improved function, and a fabricating method thereof.

Abstract: The present invention relates to a power factor correction circuit and a driving method thereof. The power factor correction circuit includes a power switch controlling an inductor current flowing in an inductor, an auxiliary inductor coupled to the inductor with a predetermined turn ratio, and a power factor correction controller controlling output power by controlling a switching operation of the power switch. The power factor correction controller determines whether or not an output voltage of the output power is an over-voltage by using the sum of a source current and a sink current that control a zero current detection voltage to be included within a predetermined clamping range, the zero current detection voltage corresponding to an auxiliary voltage that is a both-end voltage of an auxiliary inductor.

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 polysilicon 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.

Abstract: Provided are a high voltage semiconductor device in which a field shaping layer is formed on the entire surface of a semiconductor substrate and a method of fabricating the same. Specifically, the high voltage semiconductor device includes a first conductivity-type semiconductor substrate. A second conductivity-type semiconductor layer is disposed on a surface of the semiconductor substrate, and a first conductivity-type body region is formed in semiconductor layer. A second conductivity-type source region is formed in the body region. A drain region is formed in the semiconductor layer and is separated from the body region. The field shaping layer is formed on the entire surface of the semiconductor layer facing the semiconductor layer.

Abstract: Provided are power device packages, which include thermal electric modules using the Peltier effect and thus can improve operational reliability by rapidly dissipating heat generated during operation to the outside, and methods of fabricating the same. An exemplary power device package includes: a thermal electric module having a first surface and a second surface opposite each other, and a plurality of n-type impurity elements and a plurality of p-type impurity elements alternately and electrically connected to each other in series; a lead frame attached to the first surface of the thermal electric module by an adhesive member; at least one power semiconductor chip and at least one control semiconductor chip, each chip being mounted on and electrically connected to the lead frame; and a sealing member sealing the thermal electric module, the chips, and at least a portion of the lead frame, but exposing the second surface of the module.

Abstract: The present invention relates to a bootstrap switch circuit and a driving method thereof. The bootstrap switch circuit includes: an input transistor including a first electrode for receiving an input voltage; an output transistor including a second electrode connected to a second electrode of the input transistor, and a first electrode for outputting an output voltage; a control transistor including a control electrode connected to the second electrode of the input transistor and the second electrode of the output transistor, and a first electrode for receiving a power supply voltage; and a level shifter including a power input terminal connected to the second electrode of the control transistor, an output terminal connected to a control electrode of the input transistor and a control electrode of the output transistor, and an input terminal for receiving a switch control signal.

Abstract: Disclosed are an LED emitting device and driving method thereof. The LED emitting device controls an LED drive switch connected to a first end of an LED string to control an output current supplied to the LED string. The LED emitting device generates feedback information on the output voltage or the output current supplied to the LED string, and uses the output current to sense an open lamp state of the LED string. The LED emitting device uses a voltage at a first end of the LED drive switch to sense a change of the LED string to a normal state from the open lamp state.

Abstract: A driving apparatus of an LED device is provided. The LED device includes a plurality of LED channels, and each LED channel includes a plurality of LEDs connected in series. A power converter has an output terminal connected to a first terminal of each LED channel, and converts an input voltage into an output voltage to output the output voltage to the output terminal. A plurality of current controllers correspond to the plurality of LED channels, respectively. Each current controller is connected to a second terminal of a corresponding LED channel, and controls a current of the corresponding LED channel. The voltage sensor outputs a sensed voltage corresponding to the output voltage of the output terminal. The fault controller determines whether to stop operation of the power converter by comparing the sensed voltage with a reference voltage.

Abstract: A high voltage drive circuit includes an edge detector for generating an edge detection signal by detecting edges of a first high side input signal and a first low side input signal, the edge detector providing a high side delay signal and a low side delay signal by delaying the first high side input signal and the first low side input signal, a dead time generator for generating a dead time signal indicating a preset dead time in response to the edge detection signal, and a driver comprising a drive signal generator for providing a high side output signal and a low side output signal by inserting the preset dead time based on the dead time signal into the high side delay signal and the low side delay signal.

Abstract: An LED light emitting device includes LED channels with LEDs, a transformer that converts an input voltage and supply an output voltage to the LED channels, a controller, and an LED driver. The controller controls the transformer according to a first feedback signal for interrupting power supply to the LED channels when a dimming off state in which currents are not supplied to the plurality of LED channels occurs or when a state in which the maximum channel voltage of a plurality of channel voltages corresponding to voltages applied to the LED channels, respectively, is an overvoltage and a defective state in which the plurality of LED channels include an open state are maintained during a predetermined threshold period. The LED driver generates information on the dimming off state and information on the defective state.

Abstract: A power converting apparatus includes a power converter, a first resistor, a second resistor, a current controller, a voltage sensor, a sample/holder, and a switch controller. The power converter converts an input voltage into an output voltage. The first resistor is connected to an output of the power converter, and the second resistor is connected to the first resistor. The current controller controls a first current to make the first current that is less than a second current flowing in the first resistor flow in the second resistor, and outputs a third current corresponding to the first current. The voltage sensor senses a first voltage corresponding to the third current. The sample/holder samples the first voltage, and outputs the sampled voltage. The switch controller controls an operation of the power converter based on a voltage output from the sample/holder.

Abstract: The present invention relates to a power supply device generating an output power by using an AC line voltage generated through rectification of an AC input, and a driving method thereof. The power supply device controls the switching operation of the power switch by using a sensing voltage corresponding to the drain current flowing to the power switch and the feedback voltage corresponding to the output voltage. The power supply device controls the feedback current every switching cycle to generate a threshold voltage, and compares the sensing voltage and the threshold voltage to control the turn-off of the power switch. The feedback current includes the first current to generate the feedback voltage, and the threshold voltage follows a curved line waveform in which the increasing slope is decreased during the switching cycle.

Abstract: The present invention relates to a power factor correction circuit and a driving method thereof. The power factor correction circuit receives an input voltage and maintains an output voltage at a constant level by controlling switching operation of a power switch connected to an inductor that supplies the output voltage. In this case, the power factor correction circuit controls switching operation of the power switch by differentiating a control structure for an output voltage respectively according to a stabilization period during which the output voltage is constantly maintained and a start-up period during which the output voltage is increased before being stabilized. In addition, the power factor correction circuit controls the switching operation of the power switch according to the control structure of the start-up period during a predetermined correction delay period from a time that the stabilization period starts.

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.