Wx-dc12003 - Schematic
If you are looking to integrate this into a PCB design or verify its layout: 85~265V AC to 5V 3.5W DC Isolated Power Supply Module
The screen flickered. Result: No matching records found.
Despite its flaws, the WX-DC12003 is a staple in the "Maker" community. Its small footprint makes it ideal for embedding into light-duty IoT devices, smart home switches, or small Arduino projects where space is at a premium and the load is constant. For designers using Kicad, community-made footprints and symbols
Multiple modules of the same voltage can be connected in parallel to increase total current capacity in tight spaces. wx-dc12003 schematic
A small electrolytic capacitor filters this DC, producing a high-voltage DC bus (approx.
Before analyzing the underlying schematic, it is helpful to look at the primary operating parameters of the WX-DC12003 hardware module : Operational Rating 50V to 277V AC (50/60 Hz) DC Input Range 70V to 390V DC Output Voltage 5V DC (±0.15V regulation) Maximum Current 700 mA (0.7 Amps) Full Load Power ~3.5W to 4W max No-Load Consumption Conversion Efficiency Physical Dimensions 18.1 mm x 23.5 mm x 12.4 mm Deep Dive into the WX-DC12003 Circuit Schematic
A Schottky diode and filter capacitor smooth the output. Some versions include an optocoupler for voltage feedback to keep the 5V steady. Design Variations If you are looking to integrate this into
| Section | Components | Function | |---------|------------|----------| | | Fuse (F1), electrolytic capacitor (C_in), inductor (L_EMI) | Smooths DC input, blocks noise | | Switching Regulator | IC1 (e.g., LM2596, XL4015, or MP1584EN), diode (D1, Schottky), inductor (L1) | Steps down voltage via PWM | | Feedback Network | Resistor divider (R_fb_top, R_fb_bottom) | Sets output voltage (Vout = Vref * (1+R1/R2)) | | Output Stage | Capacitors (C_out), optional LED indicator | Provides stable DC output | | Protection | Current sense resistor (R_sense), thermal shutdown (inside IC) | Overcurrent & overtemperature protection |
No single official schematic exists for the "WX-DC12003" because it is a generic design sold under multiple names (Wanptek, Longwei, Rui Deng). However, the and Korad KA3005P schematics are very close in architecture (differing only in voltage/current scaling resistors).
: The brain of the board is a monolithic Primary-Side Regulation controller (often integrated with a internal high-voltage power MOSFET). This chip dynamically adjusts its switching frequency and pulse width based on feedback waveforms received through the transformer auxiliary winding. Its small footprint makes it ideal for embedding
The may not exist in any official database, but that does not mean you are powerless. By understanding the standard buck converter topology, identifying the main PWM controller, and tracing the feedback network, you can completely reverse-engineer the board in under 30 minutes.
Mains power enters through the designated pin terminals.
Kaito, a freelance "circuit-breaker," sat in a cramped basement workshop, staring at the schematic projected onto his retinas. The WX-DC12003 was a relic of the Old World, a high-efficiency switching power supply that everyone claimed didn't exist. Yet, there it was: a blueprint of capacitors, inductors, and a mysterious integrated circuit labeled only as Nexus-9 .
He closed the file, turning off the lights. The rain drummed on, but the storm, for now, was over.
A small ferrite transformer transforms the high-voltage switching energy to a lower-voltage side, providing electrical isolation. C. Output Stage (Low Voltage)