S36012 Power Supply Circuit Diagram -

This is a comprehensive feature article on the S-360-12 Power Supply Circuit Diagram. This model is a ubiquitous, open-frame switching power supply commonly found in LED lighting, 3D printers, CNC routers, CCTV systems, and audio amplifiers.

Note: 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. s36012 power supply circuit diagram

Block Diagram Overview

Before diving into the schematic, let’s establish the functional blocks of the S36012: This is a comprehensive feature article on the

  1. Input Filtering & Protection (Reverse polarity, surge suppression)
  2. PWM Control Stage (Main switching IC)
  3. Switching Stage (High-side MOSFET/Transistor + Diode)
  4. Inductor & Output Smoothing (LC filter)
  5. Feedback Network (Voltage divider for adjustable output)
  6. Current Sensing & Limiting (Optional on some versions)
  7. Output Protection (Over-voltage / short-circuit)

Section D: Secondary Rectification & LC Filter

  • Diodes: Two parallel pairs of MBR20100CT (20A, 100V Schottky). Total capacity ~40A.
  • LC Filter: The output of the diodes is a 60kHz pulsating DC. This goes through:
    • L1: A toroidal choke (yellow-white core, ~50µH) – blocks high-frequency ripple.
    • C19, C20: 2200µF/16V low-ESR electrolytics – smooth the DC.
    • Small ceramic caps (0.1µF): Shunt remaining high-frequency noise.
  • Result: Clean 12V DC with <150mV ripple.

The Full S36012 Circuit Diagram (Reconstructed)

Below is a textual schematic representation. (Note: For a visual diagram, search for "S36012 XL4016 schematic" or refer to the component layout described here.) Section D: Secondary Rectification & LC Filter