Design of a Single-Terminal Forward Switching Power Supply

Abstract

With the rapid development of electronic technology, electronic devices have shown great potential in more and more fields. Power supply performance is an essential factor in determining the quality of, and is the basis for the proper functioning of various electronic devices. Thus, as a high-efficiency, high-reliability, and low-cost isolated DC/DC converter, the forward converter has been more and more widely used in industrial production and people's life. Therefore, it is of great market value and research significance to design a single-terminal forward converter. With the current PWM control chip UC3844 and high-frequency transformer as the core and the power MOS as the control switch, only simple peripheral circuits are required to enable the buck output. On this basis, the design of the input and output rectifier filter circuit, control circuit, driver circuit, and feedback compensation circuit module is completed. The designed module and system-level circuits are simulated and verified using PSIM software.