DRIVE CIRCUIT FOR LOAD, AND LIGHTING APPARATUS USING THE SAME
PROBLEM TO BE SOLVED: To provide a drive circuit capable of preventing inrush current to a smoothing capacitor and/or a drive circuit that stabilizes output voltage in relation to fluctuation in power supply voltage while maintaining high power supply efficiency. SOLUTION: A rectification circuit 10...
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| creator | KAWANISHI DAISUKE SAKAMOTO YASUMASA |
| description | PROBLEM TO BE SOLVED: To provide a drive circuit capable of preventing inrush current to a smoothing capacitor and/or a drive circuit that stabilizes output voltage in relation to fluctuation in power supply voltage while maintaining high power supply efficiency. SOLUTION: A rectification circuit 10 performs full-wave rectification of an AC voltage Vac1. A smoothing capacitor Cs and a first transistor TR1 are provided in series on a path connecting a first output terminal P1 and a second output terminal P2 of the rectification circuit 10. A control section 12 controls ON and OFF of the first transistor TR1 depending on a voltage Vrec rectified by the rectification circuit 10. The control section 12 turns OFF the first transistor TR1 when the rectified voltage Vrec is higher than a predetermined first level VH and turns ON the first transistor TR1 when the rectified voltage Vrec is lower than the first level VH. COPYRIGHT: (C)2011,JPO&INPIT |
| format | Patent |
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SOLUTION: A rectification circuit 10 performs full-wave rectification of an AC voltage Vac1. A smoothing capacitor Cs and a first transistor TR1 are provided in series on a path connecting a first output terminal P1 and a second output terminal P2 of the rectification circuit 10. A control section 12 controls ON and OFF of the first transistor TR1 depending on a voltage Vrec rectified by the rectification circuit 10. The control section 12 turns OFF the first transistor TR1 when the rectified voltage Vrec is higher than a predetermined first level VH and turns ON the first transistor TR1 when the rectified voltage Vrec is lower than the first level VH. 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| subjects | APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERATION |
| title | DRIVE CIRCUIT FOR LOAD, AND LIGHTING APPARATUS USING THE SAME |
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