: Because the switching frequency is incredibly high, a tiny, lightweight ferrite-core transformer is all that is required to safely step down the high-voltage square waves down to low-voltage AC pulses. This transformer provides physical galvanic isolation between the lethal AC mains side and the safe DC output side.
The exact designation is typically S-360-12 (Mean Well style), where "S" often denotes a single-output switching supply, "360" refers to 360 watts, and "12" is 12 volts DC.
This stage ensures that noise from the AC mains does not enter the power supply and that switching noise does not travel back to the grid. s36012 power supply circuit diagram
The alternating current first enters through the , N (Neutral) , and GND (Earth) screw terminals.
Some models utilize a self-oscillating startup design rather than a dedicated auxiliary chip for the PWM controller, a method common in early 2000s designs. C. Half-Bridge Switching Network : Because the switching frequency is incredibly high,
The low-voltage, high-frequency AC output from the transformer's secondary winding is then rectified back into DC. This is done using fast-recovery diodes or Schottky diodes (e.g., an MBR2045CT dual Schottky diode) arranged in a configuration to convert the AC to DC. An network then smooths out the rectified DC, filtering the high-frequency switching noise and reducing output voltage ripple to below 150mV.
This is the heart of the SMPS, creating high-frequency AC from the DC voltage. This stage ensures that noise from the AC
Check the feedback loop, including the optocoupler and TL494 circuit.
The circuit includes integrated protection against short circuits, overloads, and over-voltages . Key Specifications