Power Amplifier with Power Supply
About the Power Amplifier with Power Supply PCB
Power Amplifier with Power Supply is an open source PCB design by stamatis-mavitzis, published on GitHub. It is a 2-layer board measuring 136 × 124.5 mm, with 59 components from 31 distinct parts.
By type, the board carries 17 capacitors, 16 resistors, 11 connectors, 9 transistors, 2 fuses and 1 diode.
It belongs with the audio and power & battery designs in this gallery.
From the project
DIY Hi-Fi Power Amplifier designed in KiCad, featuring a discrete Class-AB amplifier stage, dedicated power supply, STM32-based speaker protection, thermal monitoring, DC fault detection, and custom PCB designs.
KiCad · Discrete Class‑AB · ±32 V Rails · STM32G031K8 · Speaker Protection · Thermal Monitoring
This repository contains the engineering design of a two-channel discrete Hi‑Fi Class‑AB power amplifier developed in KiCad.
The power-amplifier stage is based on the design principles of Rod Elliott's ESP Project 3A, while this implementation expands the reference design into a complete stereo system with custom PCB layouts, a dual-transformer power architecture, updated production components, thermal management, and a dedicated STM32-based speaker protection controller.
Power Amplifier with Power Supply bill of materials (BOM)
59 components, 31 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | BC546 | TO-92_Inline | Q1, Q2, Q3, Q9 |
| 2 | BD140 MJE15035 | TO-126-3_Vertical | Q4, Q6 |
| 1 | BD139 MJE15034 | TO-126-3_Vertical | Q5 |
| 1 | MJL21193G | TO-264-3_Vertical | Q7 |
| 1 | MJL21194G | TO-264-3_Vertical | Q8 |
| 1 | AUDIO IN | SolderWire-6sqmm_1x01_D3.5mm_OD7mm | J1 |
| 1 | GND | SolderWire-6sqmm_1x01_D3.5mm_OD7mm | J2 |
| 2 | +35V | SolderWire-0.127sqmm_1x01_D0.48mm_OD1mm | J3, J10 |
| 2 | -35V | SolderWire-0.127sqmm_1x01_D0.48mm_OD1mm | J4, J11 |
| 1 | SPEAKER OUT | SolderWire-6sqmm_1x01_D3.5mm_OD7mm | J5 |
| 1 | V+ | SolderWire-6sqmm_1x01_D3.5mm_OD7mm | J6 |
| 1 | COM | SolderWire-6sqmm_1x01_D3.5mm_OD7mm | J7 |
| 1 | V- | SolderWire-6sqmm_1x01_D3.5mm_OD7mm | J8 |
| 1 | GND | SolderWire-0.127sqmm_1x01_D0.48mm_OD1mm | J9 |
| 1 | Diotec KBPC3506WP | Diode_Bridge_28.6x28.6x7.3mm_P18.0mm_P11.6mm | BR1 |
| 2 | 3A | Fuseholder_Cylinder-5x20mm_Stelvio-Kontek_PTF78_Horizontal_Open | F1, F2 |
| 1 | GND | SolderWire-6sqmm_1x01_D3.5mm_OD7mm | Jw1 |
| 1 | 2K | Potentiometer_Runtron_RM-065_Vertical | VR1 |
| 1 | LED | LED_D5.0mm | D1 |
| 1 | 4.7u | CP_Radial_D10.0mm_P3.50mm | C1 |
Show 11 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 100p | C_Disc_D5.0mm_W2.5mm_P2.50mm | C2, C4, C6 |
| 4 | 100u | CP_Radial_D13.0mm_P5.00mm | C3, C5, C10, C11 |
| 5 | 100n | C_Disc_D5.0mm_W2.5mm_P2.50mm | C7, C8, C12, C13, C18 |
| 4 | 4700u | CP_Radial_D25.0mm_P10.00mm_SnapIn | C14, C15, C16, C17 |
| 4 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R3, R4, R16 |
| 3 | 22K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R5, R8 |
| 2 | 560 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6, R7 |
| 3 | 3K3 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9, R10, R11 |
| 1 | 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R12 |
| 2 | 0R33 | R_Axial_Power_L25.0mm_W9.0mm_P30.48mm | R13, R14 |
| 1 | 10 | R_Axial_DIN0516_L15.5mm_D5.0mm_P20.32mm_Horizontal | R15 |
Power Amplifier with Power Supply design files
The KiCad project lives in the stamatis-mavitzis/Power-Amplifier repository on GitHub; these links point at the commit this page was built from.
Power Amplifier with Power Supply: common questions
How big is the Power Amplifier with Power Supply PCB?
The Power Amplifier with Power Supply measures 136 × 124.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Power Amplifier with Power Supply?
59 components, from 31 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Power Amplifier with Power Supply design files?
From the stamatis-mavitzis/Power-Amplifier repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Power Amplifier with Power Supply design in my own project?
The repository has no license, so all rights stay with stamatis-mavitzis. Use it as a reference, and ask the author before reusing the design.
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