4 layers81 × 60 mm
4 layers42 × 100 mm
A PSU for a modular Eurorack system, featuring +/-12V and 5V rails, USB-C input, and a regulated USB-A output.
- Size
- 42 × 100 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 68
- Nets
- 38
- Pads
- 236
- Tracks, vias
- 234, 107
- Pours
- 40
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 3 May 2026
- Updated
- 3 Oct 2026
Overview
Psu is an open-source printed circuit board by xdylanm, from the xdylanm/modular-system-psu repository on GitHub, published under the MIT licence. It is a 4-layer board of 42 × 100 mm with 68 parts on 38 nets, routed with 234 tracks and 107 vias.
It is built around the AP63301WU, CH224A and TPS2553DBV, with the TSD05DYFR, TSD03DYFR and BZT52B12 among its other parts. Its parts include 24 capacitors, 17 resistors, 9 diodes, 4 ICs and 4 connectors. It belongs with the power boards of this library.
Main components
7
AP63301WU
TSOT-23-6-40℃~+125℃ 1 22uA 3.8V~32V 3A 500kHz 800mV~31V Adjustable Buck Buck Built-in Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC ConvertersCH224A
ESSOP-10-40℃~+105℃ 140W 1C 4V~30V 5V、9V、12V、15V、20V、28V PD 3.2、BC 1.2、AVS、PPS、SPR Power Receiver Controller ESSOP-10 USB PD ROHSWCH (Nanjing Qinheng Microelectronics)USB PDTPS2553DBV
SOT-23-6-40℃~+150℃ 1 1.5A 2.5V~6.5V 85mΩ Active High High Side Switch 过压保护、软启动、欠压锁定、反向电压保护、集成电荷泵、Overcurrent Protection、Over temperature protection、锁存保护、Short-Circuit Protection SOT-23-6 Power Distribution Switches ROHSTexas InstrumentsPower Distribution Switches
TSD05DYFR
SOD-323-55℃~+150℃ 15V 19pF 5.5V 50nA 529W@8/20us 60A@8/20us 6V IEC 61000-4-2、IEC 61000-4-5 TVS SOD-323 ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD And Surge Protection (TVS/ESD)TSD03DYFR
SOD-323-55℃~+150℃ 170W@8/20us 25A@8/20us 3.6V 4.5V 4.5pF 50nA 7.7V IEC 61000-4-2、IEC 61000-4-5 TVS SOD-323 ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsUncategorised
BZT52B12
SOD-123Zener Diodeshongjiacheng
DMP3056LSS
SO-8-55℃~+150℃ 1 P-Channel 1.7V 114pF 13.7nC@10V 2.5W 30V 45mΩ@10V 7.1A 722pF 92pF P-Channel SO-8 MOSFETs ROHSDiodes IncorporatedMOSFETs
README
README.mdModular System PSU
A PSU for a modular Eurorack system, featuring +/-12V and 5V rails, USB-C input, and a regulated USB-A output.
Parts
68| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C8, C9, C11, C13, C15, C19, C23, C24 |
| 4 | 47u | Capacitors_Custom:CAP_UCD_5X5P8_NCH | C2, C3, C4, C5 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 3 | 220u | Capacitors_Custom:CAP_UCD_6P3X7P7_NCH | C6, C7, C22 |
| 3 | TSD05D | Diode_SMD:D_SOD-323_HandSoldering | D4, D5, D6 |
| 2 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10, R17 |
| 2 | 10u | Converter_DCDC_Custom:IND_BOURNS_SRR6038 | L1, L2 |
| 2 | 15k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12, R13 |
| 2 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C12, C20 |
| 2 | 220 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14, R15 |
| 2 | 22k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6, R16 |
| 2 | 3u3 | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10, C21 |
| 2 | 47u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C17, C18 |
| 2 | 4k7 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R7 |
| 2 | 500m | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2, R3 |
| 2 | TSD03D | Diode_SMD:D_SOD-323_HandSoldering | D7, D8 |
| 1 | 10u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C14 |
| 1 | 158k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8 |
| 1 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | 2k2 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 30k1 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9 |
| 1 | 47k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11 |
| 1 | 47p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C16 |
| 1 | 56k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 6u8 | Converter_DCDC_Custom:IND_MGAH06036R8M-10 | L3 |
| 1 | AP63301WU | Package_TO_SOT_SMD:TSOT-23-6 | U3 |
| 1 | BZT52B12 | Diode_SMD:D_SOD-123F | D3 |
| 1 | CH224A | Package_SO:SSOP-10-1EP_3.9x4.9mm_P1mm_EP2.1x3.3mm | U2 |
| 1 | Conn_02x02_Odd_Even | Connector_Molex:Molex_Micro-Fit_3.0_43045-0400_2x02_P3.00mm_Horizontal | J2 |
| 1 | Conn_02x08_Odd_Even | Connector_IDC:IDC-Header_2x08_P2.54mm_Horizontal | J1 |
| 1 | DMP3056LSS | Package_SO:SO-8_3.9x4.9mm_P1.27mm | Q1 |
| 1 | LED | LED_THT:LED_D3.0mm | D1 |
| 1 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | REC30K-2412DZ | Converter_DCDC_Custom:Converter_DCDC_REC30K-2412DZ | U1 |
| 1 | SW_Slide_DPDT | Switches:SW_DPDT_LC2255EENP | SW1 |
| 1 | TPS2553D | Package_TO_SOT_SMD:SOT-23-6_Handsoldering | U4 |
| 1 | TSD18D | Diode_SMD:D_SOD-323_HandSoldering | D9 |
| 1 | USB_A | AudioJacks:USB_A_Receptacle_OST_A1HSW6 | J4 |
| 1 | USB_C_Receptacle_USB2.0_14P | AudioJacks:USB_C_Receptacle_Samesky_UJ20-C-R-G-TH-1-P14-TR | J3 |
Questions
How big is the Psu PCB?
It measures 42 × 100 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Psu use?
68 parts, built around the AP63301WU, CH224A, TPS2553DBV and TSD05DYFR. 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 Psu KiCad files?
From the xdylanm/modular-system-psu repository on GitHub, at the commit this page was made from: the board is hardware/psu/psu.kicad_pcb and its schematic hardware/psu-faceplate/psu-faceplate.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Psu design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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