Overvoltage protection system and method for LED lighting

• Main Authors: YANG, JI-QING, LI, ZHUO-YAN, ZHU, LI-QIANG, FANG, LIE-YI
• Format: Patent
• Language: Chinese; English
• Published: 01.10.2017
• 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

The invention relates to an overvoltage protection system and method for LED lighting, and provides a system controller and method for a power converter. For example, the system controller used for the power converter comprises a logic controller generating modulation signals, and a driver receiving the modulation signals. The driver generates driving signals at least partially based on modulation signals and output the driving signals to the switch so as to affect current flowing through an inductance winding of the power converter. In addition, the system controller comprises a voltage-to-voltage converter receiving a first voltage signal, modulation signals and demagnetization signals, and the voltage-to-voltage converter generates a second voltage signal at least partially based on the first voltage signal, the modulation signals and the demagnetization signals.