Power supply apparatus for plasma lighting device

The present invention, by using a removal to be linear to a high pressure using the generated unstable lighting transformer, a half-bridge inverter and the power factor correction circuit of the microwave lighting apparatus will one to enhance the stability of the system. To this end, the present invention is a rectification part for rectifying a commercial AC power inputted through the power supply and; A controller for by the rectified signal inputted through the rectifying section, outputs a control signal for compensating a power factor; The power factor correction unit, by the control signal, and compensating a power factor of the DC voltage inputted through the rectifying section and; The voltage output from the power factor correction unit, and the drive unit, by the switching control signal, to vary the frequency output to a certain AC voltage corresponding thereto; An inverter driving unit for outputting a switching control signal for controlling the switching unit and the inverter; By transforming the AC voltage inputted from the inverter part and the driving part for generating a secondary magnetron filament current and a voltage of a high pressure; And comprising: a magnetron lighted by a voltage and a filament current of the high voltage output from the driving unit.