Because the control chip operates on safe low-voltages, it cannot directly toggle the high-voltage mains transistors. It drives two small signal transistors that send control pulses across an isolation drive transformer (T2) to gate the 13009 BJTs safely.
Unlike modern SMPS units that use a dedicated auxiliary chip for start-up, the S-360-12 often utilizes a self-oscillating starting design Primary Side Start-up s36012 power supply circuit diagram
The is a widely used, budget-friendly, 360W Switching Mode Power Supply (SMPS) commonly utilized for LED strips, 3D printers, and industrial automation projects . Rated for 12V DC at 30A , this unit is popular for its high power-to-price ratio. Because the control chip operates on safe low-voltages,