A New Regulated Power Supply Design

Based on the principle of electronic transformers, a new type of the power supply is designed, and the factors affecting the switching frequency are given. The feedback mechanism of the new power supply is analyzed in detail. Whats more, the pulse width modulation which controls switch tube adopts the RS flip-flop PWM. Finally based on the TL431, a 50W regulated power supply is design, which has a simple structure, small size, and low cost.