| 摘要 |
A plasma display device and a power supply device thereof are provided to control the output voltage stably by controlling plural output voltages by independent feedback by using a power unit. A plasma display device includes a panel unit(500) having plural row electrodes(Y1~Yn,X1~Xn) and plural column electrodes(A1~Am); driving units(200,320,340) applying a driving signal to the row and column electrodes of the panel unit; a control unit(400) outputting a signal for controlling the driving unit; and a power unit(100) supplying power to the panel unit, the control unit, and the driving unit. The power unit comprises a transformer outputting voltage according to the current flowing in at least two coils of a second part correspondingly to the current flowing in a coil of a first part; a first switch controlling the current flowing in the coil of the first part; a first switch control unit turning on or off the first switch; a second switch connected to the first coil of the second part to control the current flowing in the first coil; a second switch control unit controlling on/off of the second switch; a first feedback unit feeding back voltage of a first output stage electrically connected with the first coil to the second switch control unit; a third switch connected to the second coil of the second part to control the current flowing in the second coil; a third switch control unit controlling on/off of the third switch; and second feedback units feeding back the voltage of a second output stage electrically connected to the second coil to the third switch control unit.
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