1. Low power consumption and high efficiency. Under the excitation of the excitation signal, the transistor V works alternately in the on-off and off-on switching states, the conversion speed is very fast, and the frequency is generally about 50kHz. 1000kHz. This makes the power consumption of the switching transistor V very small, and the efficiency of the power supply can be greatly improved, and its efficiency can reach 80%.
2.Small size and light weight. From the schematic block diagram of the switching regulated power supply, it can be clearly seen that there is no bulky power frequency transformer used here. Since the dissipated power on the adjustment tube V is greatly reduced, the larger heat sink is omitted. Due to these two reasons, the switching regulated power supply is small in size and light in weight.
3. Wide range of voltage regulation. The output voltage from the switching regulated power supply is regulated by the duty cycle of the excitation signal, and the change of the input signal voltage can be compensated by frequency modulation or width modulation, so that when the power frequency grid voltage changes greatly, it can still To ensure a relatively stable output voltage. Therefore, the voltage regulation range of the switching power supply is very wide, and the voltage regulation effect is very good. In addition, there are two methods of changing the duty ratio: a pulse width modulation type and a frequency modulation type. In this way, the switching regulated power supply not only has the advantages of a wide range of voltage regulation, but also has many methods to achieve voltage regulation. Designers can flexibly select various types of switching regulated power supplies according to the requirements of practical applications.
4. The circuit forms are flexible and diverse. For example, there are self-excited and other-excited types, width-modulated and frequency-modulated types, single-ended and double-ended, etc. Designers can make use of the advantages of various types of circuits to design switches that can meet different applications. Power Supply.
