source:Industry News Popular:adapter release time:2021-12-28 10:17:21 Article author:sznbone
What is a switching power supply? Switch Mode Power Supply (SMPS), also known as switching power supply and switching converter, is a high-frequency electric energy conversion device and a type of power supply. Its function is to convert a level of voltage into the voltage or current required by the client through different forms of architecture. The input of the switching power supply is mostly AC power (such as city power) or DC power, and the output is mostly equipment that requires DC power, such as a personal computer, and the switching power supply performs the conversion of voltage and current between the two.
Switching power supplies are different from linear power supplies. Most of the switching transistors used in switching power supplies are switched between fully open mode (saturation zone) and fully closed mode (cut-off zone). Both modes have low dissipation characteristics. Switch between The conversion will have higher dissipation, but the time is very short, so it saves energy and generates less waste heat. Ideally, the switching power supply itself does not consume power. Voltage regulation is achieved by adjusting the time when the transistor is turned on and off. On the contrary, in the process of generating the output voltage of the linear power supply, the transistor works in the amplifying area, and it also consumes electric energy. The high conversion efficiency of the switching power supply is a major advantage, and because the switching power supply has a high operating frequency, a small size and light weight transformer can be used, so the switching power supply will be smaller in size and lighter than the linear power supply.
If the high efficiency, volume and weight of the power supply are the key considerations, the switching power supply is better than the linear power supply. However, the switching power supply is more complicated and the internal transistors will frequently switch. If the switching current is processed, noise and electromagnetic interference may affect other devices. Moreover, if the switching power supply is not specially designed, the power factor of the power supply may not be high.
Switching power supply use
Switching power supply products are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, instrumentation, medical equipment, semiconductor refrigeration and heating, air purifiers, electronic refrigerators, liquid crystal displays, LEDs Lighting, communication equipment, audio-visual products, security monitoring, LED light strips, computer cases, digital products and instruments and other fields.
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