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The principle of the switching power supply is the process to turn the power frequency AC into DC, and then convert the DC into a high frequency AC. After the process of switching the transformer, feedback voltage regulation, it becomes the voltage you need, and then it is rectified, filtered, and converted into DC. While the MOSFET is continuously turned on and off throughout the process, transforming the high voltage DC into a high frequency alternating current process.

Switching power supplies are usually classified into AC/DC, DC/DC, DC/AC, etc. In layman’s terms, a certain voltage is converted into a specific voltage suitable for the needs of electrical equipment. For example, the on-board switching power supply converts the 12V DC voltage of the vehicle into 5V or other voltage for use by the device.

Commonly used mobile phone chargers (also switching power supplies), computer power supplies, etc. are switching power supplies

Switching power supply

Switching Power Supply

The LED switching power supply has a circuit to control the switching tube for high-speed switching and cut-off. It converts direct current into high-frequency alternating current to transform the converter to generate one or more sets of voltages required. What is the switching power supply? The reason for converting to high-frequency alternating current is that the efficiency of high-frequency alternating current in the transformer is higher than the mains 50Hz or 60Hz. Therefore, the switching power supply transformer can be made small in size, and it will not be very hot when the switching power supply is working. The product price is lower than the power frequency DC regulated power supply, and what is the switching power supply, if it does not turn 50Hz or 60Hz into high Frequency, then the switching power supply does not make any sense. The switching power supply can be roughly divided into two types: isolated and non-isolated. The isolated type must have a switching power converter, and the isolated power supply converter does not necessarily have to be isolated. What is the use of switching power supply, switching power supply has the advantages of small size, light weight, and high efficiency compared with traditional DC power supply.

Switching power supply main purpose

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, LED Lighting, communication equipment, audio-visual products, security monitoring, LED light bags, computer chassis, digital products and instruments.

See a full introduction to switching power supply, click http://www.apogeeweb.net/article/1002.html


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Lily Hathaway

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