This is the "heart" of the switching power supply. The high-voltage DC bus is connected to a , which acts as a fast, electronic switch. This MOSFET is turned on and off at a high frequency, typically around 25 kHz for the S-360 series. The switching action is controlled by a dedicated PWM (Pulse Width Modulation) controller IC on the primary side.
The is a widely used, budget-friendly Switch-Mode Power Supply (SMPS) that delivers a regulated 12V DC output at up to 30A , providing a total capacity of 360 Watts . This unit serves as the backbone for high-current applications such as 3D printers, large LED strip layouts, CNC routers, and CCTV security grids. s36012 power supply circuit diagram