Driving circuit of synchronous rectification device

• Main Authors: LI HUI, CHEN YUEDONG, YE JIAYOU
• Format: Patent
• Language: Chinese; English
• Published: 28.02.2020
• 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; GENERATION

The embodiment of the invention discloses a driving circuit of a synchronous rectification device. The driving circuit comprises a controllable charging circuit and a slope detection circuit. The slope detection circuit is used for sensing whether the potential difference of a detection end of the driving circuit relative to a reference ground end of the driving circuit rises suddenly or not, andproviding a slope detection signal in response to the rising abrupt change edge of the potential difference so as to make the controllable charging circuit form a current path from the detection end to a power supply end and provide a charging current for the power supply end when the rising abrupt change edge of the potential difference occurs. According to the embodiment of the invention, the driving circuit can make the controllable charging circuit convert overshoot voltage spike energy generated in the rising abrupt change of the potential difference into the power supply potential of thewhole driving circuit whe