Design of multiple-output flyback switching mode power supply

The paper designed a single-ended flyback multi-output switching mode power supply based on TOP246Y chip,which has eight outputs and provides a reliable voltage for the motor servo system in the power board and control board.This paper mainly introduced the high-frequency transformer and chip peripheral circuit design.According to the requirements of the design,the circuit diagram,the calculation step of main parameter of transformer as well as the main 5 V output t voltage waveform were presentecl.Experiments show that the power can provide a stable DC output to meet the design target requirements in the case of input voltage fluctuations.