source:power adapter Popular:adapter release time:2021-11-30 09:21:53 Article author:sznbone
Switching power supply mainly includes input grid filter, input rectification filter, inverter, output rectification filter, control circuit, and protection circuit. Here are their functions: Input grid filter: It is used to eliminate interference ripples from the AC grid, such as light switches, household appliances, air conditioners, lightning strikes, etc., and it will also prevent switching power supplies. The generated high-frequency noise diffuses to the grid; input rectifier filter: it rectifies and filters the input voltage of the grid to provide DC voltage for the converter; inverter: it is a key part of the switching power supply. It converts the DC voltage into high frequency AC voltage, and plays the role of isolating the output part from the input power grid; output rectifier filter: it rectifies and filters the high frequency AC voltage output by the converter to obtain the required DC voltage, while also preventing The interference of high-frequency noise on the load; control circuit: detect the output DC voltage, compare it with the reference voltage, and amplify it. Modulate the pulse width of the oscillator to control the converter to maintain the stability of the output voltage; protection circuit: when the switching power supply is over-voltage, over-current short-circuit, the protection circuit stops the switching power supply to protect the load and the power supply itself. Switching power supply is a conversion device that rectifies AC power to DC power for power supply.
The advantages of switching power supply: small size, light weight, easy to carry, high efficiency, strong self-interference resistance, wide output voltage range, especially in Europe and the United States, after the power efficiency and standby power consumption requirements of the switching power supply highlights it Most of the advantages
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