Abstract: The present invention relates to an auxiliary power supply device for generating auxiliary power of a power conversion device, the auxiliary power supply device comprising: a first auxiliary power supply unit which receives power applied from a photovoltaic module and generates auxiliary power therefrom; a second auxiliary power supply unit which receives power applied from a grid and generates auxiliary power therefrom; and a driving unit which can selectively drive the second auxiliary power supply unit according to the magnitude of voltage of the photovoltaic module. Accordingly, the present invention has an advantage in that an auxiliary power supply can be normally operated even in an environment where photovoltaic power generation is not performed.

Abstract: A balancing circuit according to an embodiment of the present invention comprises: a second resistor connected to the same node as that of a first resistor of a voltage sensing unit connected to a first terminal of an output end of a power conversion device; and a fourth resistor connected to the same node as that of a third resistor of the voltage sensing unit connected to a second terminal of the output end of the power conversion device, wherein the second resistor and the fourth resistor are connected to an upper switch of the power conversion device.

Abstract: A circuit for generating auxiliary power according to an embodiment of the present invention comprises: a switching unit including at least one upper switch and at least one lower switch which are rendered conductive in a complementary manner; a resonant converter which converts power input from the switching unit and outputs the converted power; and a rectifier which rectifies an output of the resonant converter to output auxiliary power.

Abstract: A switching element operation detection device according to an embodiment of the present invention comprises: a first sensing unit for sensing current flowing through a driving circuit for driving a first switching element; a second sensing unit for sensing current flowing through a driving circuit for driving a second switching element; a first amplification unit for amplifying current sensed by the first sensing unit; a second amplification unit for amplifying current sensed by the second sensing unit; a first hysteresis unit for outputting a high signal or a low signal according to an output of the first amplifier; a second hysteresis unit for outputting a high signal or a low signal according to an output of the second amplifier; and a switching element operation detection signal output unit for outputting a switching element operation detection signal when both an output of the first hysteresis unit and an output of the second hysteresis unit are high signals.

Abstract: The present invention relates to a Digital Addressable Lighting Interface (DALI) interface and a power device comprising the same. The present invention can provide a DALI interface comprising: a first limiting circuit unit for outputting a limited current based on a DALI transmission signal and a DALI reception signal; and a gate drive circuit unit for generating, based on the limited current, a drain-source voltage that is used for generating a DALI signal in accordance with the DALI standard. As a result, the present invention can generate a signal complying with the DALI standard even under various voltage and current conditions of a DALI master.

Abstract: The present invention relates to a Digital Addressable Lighting Interface (DALI) interface and a power device comprising the same. The present invention can provide a DALI interface comprising: a first limiting circuit unit for outputting a limited current based on a DALI transmission signal and a DALI reception signal; and a gate drive circuit unit for generating, based on the limited current, a drain-source voltage that is used for generating a DALI signal in accordance with the DALI standard. As a result, the present invention can generate a signal complying with the DALI standard even under various voltage and current conditions of a DALI master.

Abstract: A non-linear analog signal conversion circuit configured of passive elements and a lighting apparatus using the same. The non-linear analog signal conversion circuit includes: an input module for inputting a dimming signal; an inversion module for inverting the dimming signal; a non-linear conversion module for non-linearly converting input power Vdc into first output power Vo1 according to the inverted dimming signal; and a filter module for converting the first output power Vo1 of an output terminal of the non-linear conversion module into reference power Vref by removing noise of the first output power Vo1.

Abstract: A dimming circuit includes an active dimmer configured to apply input power Vin to an amplification module or an error compensation module, the amplification module configured to amplify an output current of the active dimmer, and the error compensation module configured to correct an error or distortion of the amplification module. The amplification module and the error compensation module are connected in a feedback form.

Abstract: A non-linear analog signal conversion circuit configured of passive elements and a lighting apparatus using the same. The non-linear analog signal conversion circuit includes: an input module for inputting a dimming signal; an inversion module for inverting the dimming signal; a non-linear conversion module for non-linearly converting input power Vdc into first output power Vo1 according to the inverted dimming signal; and a filter module for converting the first output power Vo1 of an output terminal of the non-linear conversion module into reference power Vref by removing noise of the first output power Vo1.

Abstract: A dimming circuit includes an active dimmer configured to apply input power Vin to an amplification module or an error compensation module, the amplification module configured to amplify an output current of the active dimmer, and the error compensation module configured to correct an error or distortion of the amplification module. The amplification module and the error compensation module are connected in a feedback form.

Abstract: Disclosed is an LED protection circuit using a one-shot vibrator. The LED protection circuit includes an LED module; an LED load-open detection circuit for detecting a voltage applied to the LED module to vary a reference potential; a latch circuit for maintaining a latch state according to the reference potential of the LED load-open detection circuit; a current limit circuit for receiving an output signal from the latch circuit to output a first signal; an LED load connection detection circuit for varying the reference potential through the first signal to output a second signal; a trigger input circuit connected to the LED load connection detection circuit for outputting a third signal using the second signal; and a one-shot vibrator for outputting a fourth signal of a square waveform during a predetermined time when the third signal is input.