4 layers120 × 120 mm
4 layers100 × 50 mm
Transformer Driver
MECSEM/electricalAll the electrical designs for MECSEM.
- Size
- 100 × 50 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 61
- Nets
- 35
- Pads
- 181
- Tracks, vias
- 286, 20
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 Apr 2026
- Updated
- 27 Apr 2026
Overview
Transformer Driver is an open-source printed circuit board by MECSEM, from the MECSEM/electrical repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 100 × 50 mm with 61 parts on 35 nets, routed with 286 tracks and 20 vias.
It is built around the LM5185QPWPRQ1, SMAJ60A and H12VHD3UA, with the H3V3HD3U, P6KE22A and SMAJ33A among its other parts. Its parts include 14 capacitors, 14 resistors, 10 diodes, 5 connectors and 3 transistors. It belongs with the RP2350 boards of this library.
Main components
8
LM5185QPWPRQ1
HTSSOP-14-40℃~+150℃@(TJ) 1 11kHz~350kHz 25uA 4.5V~100V Adjustable External Flyback No HTSSOP-14 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
SMAJ60A
DO-214AC(SMA)ESD And Surge Protection (TVS/ESD)hongjiacheng
H12VHD3UA
SOD-323-55℃~+125℃ 100A@8/20us 12V 16V 2.5kW@8/20us 25V 350pF 500nA ESD IEC 61000-4-2、IEC 61000-4-5 Single-channel Unidirectional SOD-323 ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)H3V3HD3U
SOD-323-55℃~+125℃ 14V 200pF 20A@8/20us 3.3V 300W@8/20us 500nA 7V ESD IEC 61000-4-2、IEC 61000-4-5 Single-channel Unidirectional SOD-323 ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
P6KE22A
DO-15(DO-204AC)-55℃~+175℃ 18.8V 19.9A 20.9V 30.6V 600W@10/1000us IEC 61000-4-2、IEC 61000-4-4 TVS Unidirectional DO-15(DO-204AC) ESD and Surge Protection (TVS/ESD) ROHSLittelfuseESD And Surge Protection (TVS/ESD)SMAJ33A
SMA-65℃~+150℃ 1uA 33V 40.6V 400W@10/1000us 53.3V 7.5A@10/1000us TVS SMA ESD and Surge Protection (TVS/ESD) ROHSShandong Jingdao MicroelectronicsESD And Surge Protection (TVS/ESD)
SMCJ78A
SMC(DO-214AB)ESD And Surge Protection (TVS/ESD)hongjiachengSS520C
SMCSchottky Diodeshongjiacheng
Parts
61| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10kΩ | PCM_JLCPCB:R_0402 | R4, R5, R7, R13 |
| 4 | 10uF | PCM_JLCPCB:C_1206 | C1, C3, C6, C7 |
| 4 | M3 | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H4, H5, H6, H7 |
| 3 | ~ | PCM_JLCPCB:Hole_Tooling_JLCPCB | H1, H2, H3 |
| 2 | 2N7002 | PCM_JLCPCB:Q_SOT-23 | Q1, Q3 |
| 2 | 470nF | PCM_JLCPCB:C_0805 | C8, C14 |
| 2 | Conn_01x02_Pin | FYDPLIB:Molex_Micro-Fit_3.0_43650-0200_1x02_P3.00mm_Horizontal | J1, J5 |
| 2 | SMAJ60A | PCM_JLCPCB:D_SMA | D4, D5 |
| 1 | 100k | Potentiometer_THT:Potentiometer_Piher_PT-15-V02_Vertical | RV1 |
| 1 | 100kΩ | PCM_JLCPCB:R_0603 | R6 |
| 1 | 10nF | PCM_JLCPCB:C_0805 | C10 |
| 1 | 10u | Capacitor_SMD:C_2220_5750Metric_Pad1.97x5.40mm_HandSolder | C13 |
| 1 | 150pF | PCM_JLCPCB:C_0603 | C4 |
| 1 | 1kΩ | PCM_JLCPCB:R_0402 | R3 |
| 1 | 22Ω | PCM_JLCPCB:R_0805 | R9 |
| 1 | 27kΩ | PCM_JLCPCB:R_0603 | R1 |
| 1 | 2kΩ | PCM_JLCPCB:R_1206 | R12 |
| 1 | 2uF 1.1kV | Capacitor_THT:C_Rect_L31.5mm_W13.0mm_P27.50mm_MKS4 | C11 |
| 1 | 330kΩ | PCM_JLCPCB:R_0603 | R2 |
| 1 | 4.7Ω | PCM_JLCPCB:R_0805 | R14 |
| 1 | 47nF | PCM_JLCPCB:C_0603 | C2 |
| 1 | 5x20mm FUSE | FYDPLIB:Wurth_Fuseholder_696108003002 | F1 |
| 1 | 75u | Inductor_THT:L_Toroid_Vertical_L24.6mm_W15.5mm_P11.44mm_Pulse_KM-4 | L1 |
| 1 | CFILT1 | Capacitor_THT:C_Radial_D12.5mm_H25.0mm_P5.00mm | C5 |
| 1 | CFILT2 | Capacitor_THT:C_Radial_D12.5mm_H25.0mm_P5.00mm | C9 |
| 1 | COMPSEL | FYDPLIB:SolderJumper-3_HV_Open | JP1 |
| 1 | CRECT_LV | Capacitor_THT:C_Radial_D12.5mm_H25.0mm_P5.00mm | C12 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Horizontal | J2 |
| 1 | DRECT | Package_TO_SOT_THT:TO-220-2_Horizontal_TabDown | D6 |
| 1 | GDT_2Pin | FYDPLIB:GDT_Bourns_2057 | GD1 |
| 1 | Green | PCM_JLCPCB:D_0805 | D8 |
| 1 | H12VHD3UA | PCM_JLCPCB:D_SOD-323 | D7 |
| 1 | H3V3HD3U | PCM_JLCPCB:D_SOD-323 | D2 |
| 1 | LM5185QPWPRQ1 | FYDPLIB:HTSSOP-14_L5.0-W4.4-P0.65-LS6.4-BL-EP-3 | U1 |
| 1 | P6KE22A | Diode_THT:D_DO-15_P10.16mm_Horizontal | D10 |
| 1 | RCS | Resistor_THT:R_Axial_DIN0516_L15.5mm_D5.0mm_P20.32mm_Horizontal | R10 |
| 1 | RFB | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8 |
| 1 | SMAJ33A | PCM_JLCPCB:D_SMA | D1 |
| 1 | SMCJ78A | PCM_JLCPCB:D_SMC | D9 |
| 1 | SS520C | PCM_JLCPCB:D_SMC | D3 |
| 1 | SUP90330E | FYDPLIB:TO-220-3_Horizontal_TabDown_HV | Q2 |
| 1 | TVS Shunt | Resistor_THT:R_Axial_DIN0414_L11.9mm_D4.5mm_P15.24mm_Horizontal | R11 |
| 1 | TVSSEL | FYDPLIB:SolderJumper-3_HV_Open | JP2 |
| 1 | Transformer Primary | Connector_Wire:SolderWire-1sqmm_1x02_P7.8mm_D1.4mm_OD3.9mm | J3 |
| 1 | Transformer Secondary | Connector_Wire:SolderWire-1sqmm_1x02_P7.8mm_D1.4mm_OD3.9mm | J4 |
| 1 | ~ | PCM_JLCPCB:Part_Num_JLCPCB | PN1 |
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Questions
How big is the Transformer Driver PCB?
It measures 100 × 50 mm and has 4 copper layers, 1.61 mm thick.
What parts does the Transformer Driver use?
61 parts, built around the LM5185QPWPRQ1, SMAJ60A, H12VHD3UA and H3V3HD3U. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Transformer Driver KiCad files?
From the MECSEM/electrical repository on GitHub, at the commit this page was made from: the board is HVDC/Transformer Driver/Transformer Driver.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Transformer Driver design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).