Board mount power supplies are power supplies designed to be mounted directly on a circuit board (PCB). These power supplies are fixed to the circuit board by soldering or other means to provide the required power to other electronic components on the board. Board mount power supplies can be divided into many types according to the input and output voltage, such as AC-DC board mount power supplies, DC-DC board mount power supplies, etc. In addition, according to the different packaging forms, they can also be divided into packaged and open board mount power supplies. Determining the required output voltage and current according to the load requirements on the circuit board is the most basic and important parameter when selecting a power supply.