1. Due to the significant reduction in dissipated power on the adjustment tube V and the elimination of larger heat sinks. So the switch mode power supply has a small volume and light weight (the volume and weight are only 20-30% of linear power supplies).

2. High conversion efficiency and more energy-efficient (switching power supplies generally have an efficiency of over 70%, while linear power supplies only have 30-40%). In the switch mode power supply circuit, transistor V has a fast conversion speed under the excitation signal, and the efficiency of the power supply can be greatly improved, reaching 80%.

3. Strong anti-interference ability and wide voltage range, unaffected by voltage fluctuations in the power grid.