The power scheduler of the switching power supply has been operating in the expanded area, and the current continues one after another. Due to the large power loss on the dispatch tube, a high-power dispatch tube is required and a large radiator is installed. The fever is severe and the power is very low, generally 40% to 60% (it is necessary to say that it is a linear power supply).

The operating form of the switching power supply requires a step-down device from high voltage to low voltage. Generally, it is a transformer, and there are other power sources, and then they are rectified and output DC voltage. In this way, the volume is also large, relatively cumbersome, low power and large heat generation. It also has the following advantages: small ripple, good adjustment rate, low external disturbance, suitable for imitating circuits/various amplifiers, etc.

The power equipment of the switching power supply operates in the on-off state. After the voltage is dispatched, the energy is temporarily stored through the inductor, with low loss, high power and low heat dissipation requirements. There are higher requirements, and it is necessary to use materials with low loss and high permeability. Its transformer is small. Switching power supplies have high power but low standards, but compared with ripple, the voltage and current dispatch rate will have certain deductions.