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The switching power supply is relative to the linear power supply. It is used to control the switch tube through the circuit to conduct high-speed pass and cut. The direct current is converted into high-frequency alternating current and supplied to the transformer for transformation, thereby generating the required one or more sets of voltages! Simply put, a switching power supply is a transformer. The realization method of the switching power supply: rectified into direct current—inverted into alternating current of the required voltage (mainly to adjust the voltage)—and then rectified into direct current voltage output.
