Switching power supply converter and control method thereof

• Main Authors: XU DAOFEI, ZHANG HAITAO, MA KEHUA
• Format: Patent
• Language: Chinese; English
• Published: 11.06.2024
• 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 invention provides a switching power supply converter and a control method thereof.The switching power supply converter is provided, the switching power supply converter comprises a main switching tube and an auxiliary circuit connected with the main switching tube in parallel, the auxiliary circuit comprises an auxiliary switching tube and an auxiliary capacitor, and the auxiliary switching tube and the auxiliary capacitor are connected in series; the load state of the switching power supply converter is detected, when the load state of the switching power supply converter is light load, the auxiliary switching tube is controlled to be switched off, so that the first equivalent capacitance between the drain electrode and the source electrode of the main switching tube is kept at a low threshold value, and when the load state of the switching power supply converter is heavy load, the auxiliary switching tube is controlled to be switched on; and the first equivalent capacitance between the drain electrode