| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply that supplies power to a plurality of loads operating with mutually different power voltages, individually, while suppressing heat generation though it is of simple structure. SOLUTION: A first secondary output of 15 V generated in a multi-output transformer switching power circuit 23 is supplied intact as power to sensors S11 to S13, and a second secondary output of 7 V is supplied as power to sensors S14 and S15, a microcomputer 26 and a microcomputer 29, after being stepped down to 5 V with dropper power circuits 24, 25, and 28 severally. At this point, in each dropper power circuit 24, 25, and 28, the step down from 7 V to 5 V is performed, but the amount of voltage drop is small and the calorific value is small, so that there is no necessity to take a large countermeasure for heat dissipation such as a heat sink, etc. COPYRIGHT: (C)2009,JPO&INPIT
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