Flyback switching power supply design

Probe domestic switch needle KG-300K needle head diameter is 3.0mm normally open switch needle

1206 red anti-stick

Summary:

The emergence of switching power supplies has led to the use of utility-powered equipment to bid farewell to bulky transformers and linear regulators that require the use of heat sinks. Electronics have achieved smaller size, lighter weight and higher efficiency. However, the switching power supply greatly increases the threshold of the design, which requires the designer to have a deep understanding of the circuit and magnetism. There are many books on switching power supplies, but most of them are too complicated. It takes a lot of time and energy to learn and digest a book. Even if this difficult task is completed, the designer does not have the ability to independently design a complete power system.

Here, the author talks about the design method of the flyback switching power supply based on his own knowledge and practical experience, and combines the detailed calculation process of the example transformer design. Because the author is not in contact with the switching power supply for a long time, the omission and improperness in the text are inevitable, and readers are expected to criticize and correct.

Output 5V / 2A offline flyback converter

See the uploading documentation for details (click to download)