Design and Implementation of Multi-output Flyback Switch Power Supply

The switching power supply with flyback topology type has the advantages of easy design, lightweight, and high efficiency, and it is widely used in occasions with low power and multiple outputs. In order to solve the problems of low efficiency and low output precision of switching power supply in the current market, this paper proposes an improved 90~264Vac to +5V, +15V, -15V three-way output flyback with a power of 43.5W. The experimental test results show that the proposed switching power supply has the advantages of strong anti-interference, strong robustness, high efficiency, and low cost, and it can be widely used in various electronic devices.