摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power supply device having less power loss even when applied to wide range of input voltages. <P>SOLUTION: This power supply device 1000 is provided with a first control power supply portion 220, which inputs a starting current for an inverter control circuit 210 from a diode bridge 2, supplies starting power supply charged by the starting current to the inverter control circuit 210, and supplies control power supply to the inverter control circuit 210 by being charged based on a high frequency current outputted by the inverter circuit 200 after the starts of the oscillation of the inverter circuit 200 by the start of the inverter control circuit 210, a second control power supply portion 120, which supplies the control power supply to a step-up chopper control circuit 110 by being charged based on the high frequency current outputted by the inverter circuit 200 after the starts of the oscillation of the inverter circuit 200, and a bypass circuit 500 that bypasses the starting current from the diode bridge when the inverter control circuit 210 receives the control power supply and when the step-up chopper control circuit 110 receives the control power supply. <P>COPYRIGHT: (C)2007,JPO&INPIT |