Wannien 101v0 Power Supply: Schematic Verified [better]

Each output channel ( OUT1 , OUT2 , OUT3 , OUT4 ) uses its own dedicated .

RDS(on)cap R sub cap D cap S open paren o n close paren end-sub

Includes an EMI filter, bridge rectifier, and a large bulk capacitor for smoothing high-voltage DC. wannien 101v0 power supply schematic verified

Pre-regulation / heat distribution

Safety Warning: Power supplies contain lethal voltages trapped in large capacitors even after being unplugged. Always discharge the bulk capacitor (C1) using a high-wattage resistor (e.g., 1kΩ / 5W) before touching any component. Each output channel ( OUT1 , OUT2 ,

A shorted MOSFET or rectifier draws massive current, instantly blowing the main fuse. Secondary Diode, Output Capacitors

AC power enters through a fuse (typically 2A to 3.15A, slow-blow) and a metal oxide varistor (MOV) designed to clamp over-voltage spikes. It then passes through a common-mode choke (inductor) and X/Y safety capacitors. This network prevents electromagnetic interference (EMI) from leaking back into your home grid and protects the power supply from line noise. Bridge Rectification and Bulk Filtering Always discharge the bulk capacitor (C1) using a

Input fuse, filter capacitors (C1, etc.), and the 5V regulator IC.

If you must troubleshoot a live board, always use a connected in series with the AC line. If there is a short, the light bulb will illuminate brightly, safely absorbing the current instead of exploding your new replacement components. Measure Bulk DC: Verify that you have roughly

CURRENT SENSING: Output Negative Terminal → Shunt Resistor (0.1Ω/5W) → Load_Negative Shunt Voltage → Op-Amp U1B (Pin5/Pin6) → Current Pot Adjustment