What are the characteristics of switching power supply?

Switching power supply is generally composed of pulse width modulation (PWM) control IC and MOSFET. With the development and innovation of power electronics skills, switching power supply is now widely used in almost all electronic equipment with the characteristics of small size, light weight and high power, and its importance can be seen.

Classification of switching power supply

According to the connection method of switching devices in the circuit, switching power supply can be generally divided into three categories: series switching power supply, parallel switching power supply and transformer switching power supply< br /> Among them, transformer switching power supply can be further divided into push-pull, half bridge, full bridge and other types. According to the excitation of the transformer and the phase of the output voltage, it can be divided into forward, flyback, single and double excitation, etc.

Differences between switching power supply and common power supply

The common power supply is generally a linear power supply. The linear power supply refers to the power supply in which the regulator operates in a linear state, which is different in switching power supply. The switch tube (in switching power supply, we generally call the regulator switch tube) operates in both on and off states: on - very low resistance, off - very high resistance. Switching power supply is a relatively new type of power supply. It has the advantages of high power, light weight, high output power, etc. However, because the circuit is in the switching state, the noise is relatively large.