Piecewise linear oblique wave compensation circuit of switching power supply

• Main Authors: XIAO SHIMAO, CHEN YIXUAN
• Format: Patent
• Language: Chinese; English
• Published: 21.03.2023
• 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 utility model relates to a piecewise linear oblique wave compensation circuit of a switching power supply, and relates to the technical field of integrated circuit design. The circuit comprises a square wave generating circuit, a capacitor charging and discharging network circuit, a voltage adjusting circuit and an oblique wave current generating circuit, the square wave generating circuit, the capacitor charging and discharging network circuit, the voltage adjusting circuit and the oblique wave current generating circuit are connected in sequence. According to the circuit, a piecewise linear oblique wave compensation method is adopted, subharmonic oscillation generated by peak current mode control is eliminated, meanwhile, the reduction degree of the peak current of the circuit caused by the duty ratio is reduced, and the load capacity of the switching power supply is improved. While the simple circuit structure is ensured, the required reference signal can be generated by dividing the reference voltage