Switching power supply and control method thereof, power supply system and electronic equipment

• Main Authors: QIAN YAO, LI WEINAN, PAN XIAOJUN, ZHOU WEI
• Format: Patent
• Language: Chinese; English
• Published: 20.08.2024
• 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 embodiment of the invention provides a switching power supply, a control method thereof, a power supply system and electronic equipment, relates to the technical field of circuits, and can improve the power supply performance of the switching power supply. The switching power supply comprises an input end, an output end, an inductive element and a capacitive element, wherein the inductive element and the capacitive element are coupled between the input end and the output end. The control method of the switching power supply comprises the steps that in a boost mode, the switching power supply is controlled to supply power in the boost mode, and the ratio of the voltage of the output end of the switching power supply to the voltage of the input end of the switching power supply is (2-D1)/(1-D1); d1 represents the ratio of the time length of boost charging of the switching power supply to the total time length of boost charging and boost discharging of the switching power supply. In the step-down mode, the s