The main circuit of the switching power supply is composed of the following parts:
Impulse current limit: limit the impulse current on the input side when the power is turned on.
Input filter: Its function is to filter the clutter that exists in the power grid and prevent the clutter generated by the machine from being fed back to the power grid.
Rectification and filtering: Directly rectify the AC power of the grid into a smoother DC.
Inverter: Convert the rectified direct current into high-frequency alternating current, which is the core part of the high-frequency switching power supply.
Output rectification and filtering: According to the needs of the load, provide a stable and reliable DC power supply.