| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrical power system capable of reducing a manufacturing cost, and a lighting system using a power supply device of the electrical power system. <P>SOLUTION: In the electrical power system, a first power supply device 11 and a second power supply device 12 have: two power supply circuits 21 and 31 and two power supply circuits 22 and 32, respectively; and control circuits 41 and 42 provided in each of the power supply circuits 21, 22, 31 and 32, respectively, and driving switching elements Q1-Q6. Since each of the control circuits 41 and 42 is used in both of the first power supply device 11 and the second power supply device 12, a manufacturing cost as the total of the first power supply device 11 and the second power supply device 12 can be reduced by mass production effects of each of the control circuits 41 and 42. <P>COPYRIGHT: (C)2012,JPO&INPIT |
