Flyback-AC-DC-Converter
About the Flyback-AC-DC-Converter PCB
Flyback-AC-DC-Converter is an open source PCB design by MoElashmawi, published on GitHub under the MIT license. It is a 2-layer board measuring 99.7 × 48.8 mm, with 34 components from 31 distinct parts.
Other key parts include the VIPer22ADIP-E, TL431DBZ and EL817. By type, the board carries 11 capacitors, 7 resistors, 4 diodes, 3 ICs, 2 connectors and 1 fuse.
From the project
Flyback AC-DC Converter (230V AC to 12V DC) — Full SMPS design using VIPer22A PWM Controller. Schematic, PCB layout & 3D render in KiCad.
KiCad 10.0.1 | Mohamed Elashmawi | TU Dortmund
A complete Switch-Mode Power Supply (SMPS) designed from scratch using the flyback topology, converting 230 VAC mains input to a regulated 12 VDC output. The project covers full schematic design, PCB layout and 3D validation.
The design is split into four functional blocks.
The flyback topology generates high-voltage spikes on the MOSFET drain at turn-off, caused by the leakage inductance of the transformer. An RCD clamp (R3 = 100 kΩ, C3 = 2.2 nF / 1 kV, D1 = FR107) absorbs this energy and protects the MOSFET integrated in the VIPer22A.
Main components on the Flyback-AC-DC-Converter
Flyback-AC-DC-Converter bill of materials (BOM)
34 components, 31 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | VIPer22ADIP-E | DIP-8_W7.62mm | U1 |
| 1 | TL431DBZ | SOT-23 | U2 |
| 1 | EL817 | DIP-4_W7.62mm | U3 |
| 1 | AC Eingang | TerminalBlock_Phoenix_MKDS-1-2-3.81_1x02_P3.81mm_Horizontal | J1 |
| 1 | DC Ausgang | TerminalBlock_Phoenix_MKDS-1-2-3.81_1x02_P3.81mm_Horizontal | J2 |
| 1 | 500mA | Fuse_2010_5025Metric | F1 |
| 1 | Choke_Schaffner_RN102-0.3-02-12M | Choke_Schaffner_RN102-04-14.0x14.0mm | FL1 |
| 1 | Varistor | RV_Disc_D12mm_W5mm_P7.5mm | RV1 |
| 1 | 500R_Trim | Potentiometer_Bourns_3296W_Vertical | RV3 |
| 1 | EE25-13-7 | Transformer_Myrra_EF20_7408x | T1 |
| 1 | Thermistor_NTC | RV_Disc_D9mm_W4mm_P5mm | TH1 |
| 1 | FR107 | D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 1 | 3mm-LED | LED_D3.0mm | D3 |
| 1 | SB360 | D_DO-201AD_P15.24mm_Horizontal | D5 |
| 1 | KBP206 | Diode_Bridge_DIP-4_W7.62mm_P5.08mm | D15 |
| 1 | 10µH | L_Axial_L7.0mm_D3.3mm_P10.16mm_Horizontal_Fastron_MICC | L1 |
| 1 | 100nF-275VAC | C_Rect_L13.0mm_W5.0mm_P10.00mm_FKS3_FKP3_MKS4 | C1 |
| 1 | 22uF-400V | CP_Radial_D12.5mm_P5.00mm | C2 |
| 1 | 2.2nF-1KV | C_Disc_D9.0mm_W5.0mm_P7.50mm | C3 |
| 1 | 10nF-1KV | C_Disc_D7.5mm_W5.0mm_P5.00mm | C4 |
Show 11 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 470μF-16V | CP_Radial_D8.0mm_P3.50mm | C5, C6, C7, C8 |
| 1 | 100nF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C9 |
| 1 | 100uF-16V | CP_Radial_D6.3mm_P2.50mm | C10 |
| 1 | 10nF-50v | C_Disc_D5.0mm_W2.5mm_P2.50mm | C11 |
| 1 | 330 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 100K-1W | L_Axial_L7.0mm_D3.3mm_P10.16mm_Horizontal_Fastron_MICC | R3 |
| 1 | 2.2K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 1 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 18K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | 4.7K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7 |
| 1 | 3.9K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8 |
Flyback-AC-DC-Converter design files
The KiCad project lives in the MoElashmawi/Flyback-AC-DC-Converter repository on GitHub; these links point at the commit this page was built from.
- LayoutAC-DC Wandler.kicad_pcb
- SchematicAC-DC Wandler.kicad_sch
Flyback-AC-DC-Converter: common questions
How big is the Flyback-AC-DC-Converter PCB?
The Flyback-AC-DC-Converter measures 99.7 × 48.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Flyback-AC-DC-Converter?
34 components, from 31 distinct parts. The full bill of materials is listed on this page.
Where can I download the Flyback-AC-DC-Converter design files?
From the MoElashmawi/Flyback-AC-DC-Converter repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Flyback-AC-DC-Converter design in my own project?
Yes, under the terms of its MIT license, which MoElashmawi chose for the repository.