Abstract: There is provided a driver for a plasma display panel having a separated board structure that can reduce parasitic resonance by shortening the length of a cable used for power transmission by separating a board having a Y electrode switch thereon from a board having an X electrode switch thereon.

Abstract: Provided is a switching mode power supply circuit for plasma display panel, which includes an EMI filter unit, a PFC unit, an output unit, and a standby unit. The EMI filter unit may include a first line filter connected to a commercial line input power, a first capacitor and discharge resistor connected to the first line filter, a second line filter connected to the first capacitor and discharge resistor, a second capacitor connected to the second line filter, and a relay unit disposed between the first line filter and the first capacitor and discharge resistor. The standby unit may be connected to a contact point of the first line filter and the relay unit.

Abstract: An apparatus for driving a light emitting part includes a DC/DC converter for supplying an amplified driving voltage to the light emitting part; a constant current circuit for controlling a current flowing through the light emitting part; a converter controller for controlling the DC/DC converter and the constant current circuit; a current sensor for sensing and converting a current flowing to an anode of the light emitting part into a voltage; a feedback controller for controlling a feedback current according to a magnitude of the voltage from the current sensor; an optical coupling part for performing optical coupling to transmit the feedback current as a feedback voltage; and a main controller for determining whether an over-current is occurring according to a magnitude of the feedback voltage and stopping an operation of the converter controller when the over-current is occurring.

Abstract: The present invention relates to a switching mode power supply circuit for a plasma display panel comprising an input unit, a PFC (Power Factor Correction) unit, an output unit and a standby unit, wherein the standby unit includes a standby block for outputting a standby voltage by being connected to an AC filter stage of the input unit, a sequence block for sequentially applying power of the output unit and a control block which is connected between the standby block and the sequence block and inputs the standby voltage outputted from the standby block to the sequence block only in case that a PS_ON signal is applied.

Abstract: There is provided a driver for a plasma display panel that can perform power transmission by setting different paths for an address period and a sustain period. The driver for a plasma display panel may include: a power supply part converting commercial AC power into predetermined driving power; a driving part switching the driving power from the power supply part during the sustain period to supply the switched driving power to the plasma display panel; and a path setting part setting a path through which the driving power from the power supply part is transmitted to the driving part during the sustain period and setting a charging path through which a capacitor is charged with the driving power from the power supply part during the address period.

Abstract: There is provided a driver for a plasma display panel having a separated board structure that can reduce parasitic resonance by shortening the length of a cable used for power transmission by separating a board having a Y electrode switch thereon from a board having an X electrode switch thereon.

Abstract: There is provided an alternating current (AC) detection circuit for power supply, the AC circuit including: a rectifying part rectifying an AC voltage; a voltage division part dividing the voltage rectified by the rectifying part according to a preset division ratio; a voltage stabilization circuit part stabilizing the voltage divided by the voltage division part; and a first square wave generating part comparing the voltage stabilized by the voltage stabilization circuit part with an internal reference voltage, and generating a first square wave signal having a duty ratio according to comparison results between the stabilized voltage and the internal reference

Abstract: Disposed is a driver for a plasma display panel, which is capable of absorbing surplus power of a plasma display panel by power conversion switching performed according to the switching of a sustain circuit to form a transmission path using resonance between the inductance of a transformer for power conversion and the capacitance of the plasma display panel, without using an energy recovery circuit. The driver includes a power supply unit including preset inductance, and converting alternating current (AC) commercial power into preset driving power by using the inductance, a driving unit switching the driving power from the power supply unit according to a logic signal and supplying the switched driving power to a plasma display panel. Surplus power of the driving unit is transmitted to the power supply unit by resonance between the inductance of the power supply unit and capacitance of the plasma display panel.

Abstract: There is provided an alternating current (AC) detection circuit for a power supply, the circuit including: a rectifying part rectifying an AC voltage; a voltage division part dividing the voltage rectified by the rectifying part according to a preset division ratio; a voltage stabilization circuit part stabilizing the voltage divided by the voltage division part; a comparing part comparing the voltage stabilized by the voltage stabilization circuit part with an internal reference voltage and generating an input detection signal when the stabilized voltage is higher than the internal reference voltage; and an output part outputting an AC detection signal when the input detection signal is inputted from the comparing part.

Abstract: Provided is a switching mode power supply circuit for plasma display panel, which includes an EMI filter unit, a PFC unit, an output unit, and a standby unit. The EMI filter unit may include a first line filter connected to a commercial line input power, a first capacitor and discharge resistor connected to the first line filter, a second line filter connected to the first capacitor and discharge resistor, a second capacitor connected to the second line filter, and a relay unit disposed between the first line filter and the first capacitor and discharge resistor. The standby unit may be connected to a contact point of the first line filter and the relay unit.

Abstract: The present invention relates to a switching mode power supply circuit for a plasma display panel comprising an input unit, a PFC (Power Factor Correction) unit, an output unit and a standby unit, wherein the standby unit includes a standby block for outputting a standby voltage by being connected to an AC filter stage of the input unit, a sequence block for sequentially applying power of the output unit and a control block which is connected between the standby block and the sequence block and inputs the standby voltage outputted from the standby block to the sequence block only in case that a PS_ON signal is applied.

Abstract: There is provided a power factor corrected circuit having an integrated coil in which a plurality of inductors that have been separately used for circuits are wound around one core. The power factor corrected circuit includes a rectifying unit for rectifying a common AC power supply; a coil unit for controlling the change in electric current of the rectified power supply from the rectifying unit according to the switching operation; and a switching unit for complementarily switching the power supply from the coil unit, wherein the coil unit has a core including first and second coils electrically coupled to each other; and first, second and third legs magnetically coupled to each other, and the first coil is wound around the first leg, the second coil is wound around the second leg, and the third leg is combined with the first and the second leg to form magnetic flux paths, respectively.

Abstract: In the DC/DC converter, a switching part has first and second switches serially connected from a power supply to a ground. The first and second switches switch on/off in response to first and second switching signals having a fixed frequency. The first switching signal has a phase level that does not overlap a corresponding phase level of the second switching signal. A transformer transforms a voltage applied to a first winding into a second winding in response to switching operation of the switching part, and resonates by an inductor and a capacitor of the first winding. Also, a rectifier includes a rectifying diode for rectifying the voltage from the transformer into a direct voltage. A feedback circuit detects the voltage outputted via the rectifier. Additionally, a controller controls pulse width of the first and second switching signals in a PWM mode according to the voltage detected by the feedback circuit.