A power module is a power supply that can be directly mounted on a printed circuit board. It can convert one form of electrical energy into another form of electrical energy to meet the power needs of different electronic devices.

Working Principle:

The working principle of the power module is based on theories such as electromagnetic induction and power electronic conversion. Taking the common switching power module as an example, its basic working process is to first convert the input alternating current (AC) into direct current (DC) through a rectifier circuit, and then chop the DC into a high-frequency pulse voltage through the high-frequency conduction and cutoff of the switch tube, and then convert the voltage through a high-frequency transformer, and finally convert the high-frequency pulse voltage into a stable DC output through a rectifier and filter circuit. By controlling the conduction time (i.e., duty cycle) of the switch tube, the output voltage can be adjusted.