Efficient voltage reducing switch

• Main Author: DAYANG YANG
• Format: Patent
• Language: English
• Published: 21.03.2007
• 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; CONTROLLING; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; PHYSICS; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

This invention provides a high efficient voltage-dropping converter with power-saving structure, in which, a first circuit generates an oscillation signal and a power-saving signal based on a feedback signal, a second circuit generates multiple switch signals based on said feedback signal and said oscillation signal to control multiple switch devices, and the off time of the switch signal prolongs along the reduction of the load, said power saving signal cuts off part of control circuit of said switch device and the voltage dropping converter at the cut-off time of the switch signal to save power under light load.