基于TOP247Y的通用单片开关电源设计

flyback switching power supply based on TOP227Y is presented. Firstly, the principle and characteristics of this Single -chip switching power supply are analyzed. A single-chip switching power supply is designed according to the features of the chip which output power is 50W and output voltage is +20V. Second, the design method and practical circuit. are described. Calculation of the values of the parameters and selection of the components are provided. Finally, the paper puts forward the power of the test result, and the overall performance analysis. The test result shows the power supply have high efficiency, low ripple, stability output voltage and so on.