Novel optical coupling isolation circuit

• Main Authors: GAO JIFENG, CAI HONGDONG
• Format: Patent
• Language: Chinese; English
• Published: 22.09.2017
• 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; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The utility model provides a novel optical coupling isolation circuit, non -isolated power control chip U1's pin COMP are connected to photoelectric coupling pipe U2's collecting electrode, non -isolated power control chip U1's pin VFB, non -isolated power control chip U1's pin GROUND and photoelectric coupling pipe U2's emitter ground, photoelectric coupling pipe U2's positive pole is connected to the output through resistance R3, and photoelectric coupling pipe U2's negative pole is connected to the output through resistance R4, and error amplifier U3's negative pole is connected to photoelectric coupling pipe U2's negative pole, error amplifier U3's plus earth, and error amplifier U3's reference input end is connected to resistance R1's one end and resistance R2's one end respectively, and the resistance R1 other end is connected to output, resistance R2's other end ground connection, simplified the circuit, the user of being convenient for uses. 本实用新型提供了种新型光耦隔离电路，非隔离电源控制芯片U1的引脚COMP连接至光电耦合管U2的集电极，非隔离电源控制芯片