2 layers102 × 102 mm
2 layers130 × 75 mm
Q17-SIGMA PSU
stefaweb/audio-psu10Some power supply PCBs I developed.
- Size
- 130 × 75 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 84
- Nets
- 41
- Pads
- 219
- Tracks, vias
- 245, 2
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 12 Dec 2024
- Updated
- 26 Dec 2025
Overview
Q17-SIGMA PSU is an open-source printed circuit board by stefaweb, from the stefaweb/audio-psu repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 130 × 75 mm with 84 parts on 41 nets, routed with 245 tracks and 2 vias.
It is built around the BC548B, IRF9Z34NPBF and IRFZ24NPBF, with the BC546B, BC556B and BC558B among its other parts. Its parts include 24 resistors, 17 capacitors, 10 connectors, 9 transistors and 8 diodes. It belongs with the power and audio and music boards of this library.
Main components
7
BC548B
TO-921 NPN 100mA 100nA 150MHz 200 300mV 30V 625mW 6V NPN TO-92 Bipolar (BJT) ROHSLGEBipolar (BJT)
IRF9Z34NPBF
TO-220AB-55℃~+175℃ 1 P-Channel 100mΩ@10V 140pF 19A 2V 35nC 55V 620pF 68W TO-220AB MOSFETs ROHSInfineon TechnologiesMOSFETsIRFZ24NPBF
TO-220AB-55℃~+175℃ 1 N-channel 17A 20nC 2V 370pF 45W 55V 65pF 70mΩ@10V TO-220AB MOSFETs ROHSInfineon TechnologiesMOSFETsBC546B
TO-921 NPN 100mA 100nA 150MHz 200 300mV 625mW 65V 6V NPN TO-92 Bipolar (BJT) ROHSLGEBipolar (BJT)BC556B
TO-92-55℃~+150℃ 1 PNP 100mA 150MHz 15nA 200 500mW 5V 650mV 65V PNP TO-92 Bipolar (BJT) ROHSDIOTECBipolar (BJT)BC558B
TO-921 PNP 100mA 100nA 150MHz 180 30V 5V 625mW 650mV PNP TO-92 Bipolar (BJT) ROHSLGEBipolar (BJT)
TL431B
SOT-23-20℃~+70℃@(Ta) 150mA 1uA 2.5V~36V 2.5V~36V 250uA Adjustable Parallel ±0.3% SOT-23 Voltage Reference ROHShongjiachengVoltage Reference
README
LVPS-PCB-MINI-1.1/LVPS-PCB-MINI-BASE-KICAD-1.0/README.mdLVPS-PCB-MINI
Mini PCB canvas in KiCad 6.x format.
Parts
84| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R15, R18, R19, R22, R23 |
| 6 | 100R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8, R10, R11, R12, R13, R14 |
| 4 | 0R47 5W | Resistor_THT:R_Box_L14.0mm_W5.0mm_P9.00mm | R16, R17, R20, R21 |
| 4 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D3, D4, D5, D6 |
| 4 | 1uF 100V | Capacitor_THT:C_Rect_L26.5mm_W10.5mm_P22.50mm_MKS4 | C3, C4, C16, C17 |
| 4 | 220uF 80v | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C5, C6, C7, C8 |
| 4 | 531202B21G | Heatsink:Heatsink_Fischer_SK104-STC-STIC_35x13mm_2xDrill2.5mm | HS1, HS2, HS3, HS4 |
| 4 | GND | Q17_Library:Faston_Connector_63849-1_TEC | J1-2, J2-3, J2-4, J2-5 |
| 4 | MountingHole_4.3mm_M4_Pad_Via | MountingHole:MountingHole_4.3mm_M4_Pad_Via | PAD1, PAD2, PAD3, PAD3 |
| 3 | 100uF 80v | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C9, C10, C11 |
| 2 | 100nF | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C1, C2 |
| 2 | 1N5819 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2 |
| 2 | 220pF | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C14, C15 |
| 2 | 3900pF | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C12, C13 |
| 2 | BC548B | Package_TO_SOT_THT:TO-92L_Inline_Wide | Q1, Q3 |
| 2 | E-202 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | CR1, CR2 |
| 2 | E-562 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | CR3, CR4 |
| 2 | IRF9Z34NPBF | Package_TO_SOT_THT:TO-220-3_Vertical | Q7, Q9 |
| 2 | IRFZ24NPBF | Package_TO_SOT_THT:TO-220-3_Vertical | Q6, Q8 |
| 2 | LED | LED_THT:LED_D5.0mm | D7, D8 |
| 2 | V+ | Q17_Library:Faston_Connector_63849-1_TEC | J2-1, J2-2 |
| 2 | V- | Q17_Library:Faston_Connector_63849-1_TEC | J2-6, J2-7 |
| 2 | ZHB6792TA | Package_TO_SOT_SMD:SOT-223-8 | U1, U2 |
| 1 | 100K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 1 | 10K | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | TR1 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9 |
| 1 | 27K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7 |
| 1 | 330K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R44 |
| 1 | 47K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 4K7 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | 510K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | BC546B | Package_TO_SOT_THT:TO-92L_Inline_Wide | Q5 |
| 1 | BC556B | Package_TO_SOT_THT:TO-92L_Inline_Wide | Q4 |
| 1 | BC558B | Package_TO_SOT_THT:TO-92L_Inline_Wide | Q2 |
| 1 | TL431B | Package_TO_SOT_THT:TO-92L_Inline_Wide | SR1 |
| 1 | V+ (IN) | Q17_Library:Faston_Connector_63849-1_TEC | J1-1 |
| 1 | V- (IN) | Q17_Library:Faston_Connector_63849-1_TEC | J1-3 |
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Questions
How big is the Q17-SIGMA PSU PCB?
It measures 130 × 75 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Q17-SIGMA PSU use?
84 parts, built around the BC548B, IRF9Z34NPBF, IRFZ24NPBF and BC546B. 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 Q17-SIGMA PSU KiCad files?
From the stefaweb/audio-psu repository on GitHub, at the commit this page was made from: the board is Q17-SIGMA-PSU-1.1/KiCad source/Q17-SIGMA-PSU.kicad_pcb and its schematic Q17-PSU-1.1/KiCad source/Q17-PSU.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Q17-SIGMA PSU 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).