Switching power supplies mainly use modern electronic power technology to maintain the stability of the output voltage by controlling the ratio of the time that the electronic components are turned on and off. It is generally composed of MOSFFT and pulse width modulation, and has the characteristics of light weight, small size, low power and high efficiency. Currently widely used in digital products, medical, military and other fields.

Switching power supply

The switching power supply is mainly composed of a main circuit, a control circuit, a detection circuit and an auxiliary power supply.

The role of the main circuit

The main circuit can be divided into an input filtering part, an inverting part, an inrush current limiting part, a rectifying and filtering part, and an output rectifying and filtering part.

The inrush current limiting portion is responsible for limiting the inrush current on the input side of the power-on instant;

The input filter part is responsible for filtering the clutter; the rectification and filtering part is responsible for rectifying the grid AC power to direct current;

The inverter part is responsible for converting the direct current formed by the rectification into high frequency alternating current;

The output rectification and filtering section is responsible for providing a stable and reliable DC power supply.