2 layers107.2 × 60.3 mm
Class D Audio Amplifier
fredie1811/Class-D-Amplifier
The KiCad Schematic and PCB Layout for a Half Bridge Class-D Audio Amplifier using an MH-M28 for inputting the audio via an audio jack or via bluetooth.
35 parts
4 layers85 × 48 mm
Class DAmp
Shift-delete0/Class_D_AmplifierThis is my project in which i have made a class D amplifier from scratch. I did this to challenge myself and learn more about analog electronics and amplifier. I have also designed an industrial level schematic and PCB using KiCad for the components which I had.
- Size
- 85 × 48 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 32
- Nets
- 36
- Pads
- 116
- Tracks, vias
- 130, 8
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 Mar 2026
- Updated
- 17 Mar 2026
Overview
Class DAmp is an open-source printed circuit board by Shift-delete0, from the Shift-delete0/Class_D_Amplifier repository on GitHub. It is a 4-layer board of 85 × 48 mm with 32 parts on 36 nets, routed with 130 tracks and 8 vias.
It is built around the IR2110L4, LM386 and 74HC04D, with the LM393, NE555P and IRLZ44N among its other parts. Its parts include 9 capacitors, 7 ICs, 6 resistors, 3 diodes and 3 connectors.
Main components
6
IR2110L4
DIP-14DIP-14 Gate DriversInfineon TechnologiesGate Drivers
LM386
SOP-80.2% 0℃~+70℃ 4V~12V 4mA 50dB 700mWx1@8Ω Analog voltage gain SOP-8 Audio Amplifiers ROHSGcoreAudio Power OpAmps
74HC04D
SOP-14-40℃~+125℃ 1 1.5V~4.2V 1.9V、3.7V、5.2V 100mV、400mV、400mV 14ns@6V,50pF 2V~6V 2uA 5.2mA 5.2mA 500mV~1.8V 6 74HC SOIC-14 Inverters ROHSNexperiaInvertersLM393
SOP-8-16V~16V 0℃~+70℃ 2 2.5mA 250nA 2V~36V 36V 5mV 5nA Fail-safe function Open-drain SOP-8 Comparators ROHSMSKSEMIComparators
NE555P
DIP-80℃~+70℃ 100kHz 10mA 4.5V~16V DIP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / Counters
IRLZ44N
TO-22055V 47A N-Channel HEXFET® Power MOSFETInfineon TechnologiesUncategorised
README
README.mdClass_D_Amplifier
This is my project in which i have made a class D amplifier from scratch. I did this to challenge myself and learn more about analog electronics and amplifier. I have also designed an industrial level schematic and PCB using KiCad for the components which I had.
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | R | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R1, R3, R4, R5, R6 |
| 3 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3 |
| 3 | C_Polarized_Small | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C6, C7, C8 |
| 2 | C | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C3, C4 |
| 2 | Conn_01x02_Socket | TerminalBlock:TerminalBlock_MaiXu_MX126-5.0-02P_1x02_P5.00mm | J2, J3 |
| 2 | IRLZ44N | Package_TO_SOT_THT:TO-220-3_Vertical | Q1, Q2 |
| 1 | 1nF | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C1 |
| 1 | 2k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R2 |
| 1 | 74HC04 | Package_DIP:DIP-14_W7.62mm | U4 |
| 1 | AudioJack3_SwitchTR | Connector_Audio:Jack_3.5mm_CUI_SJ1-3525N_Horizontal | J4 |
| 1 | C | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C5 |
| 1 | C | Capacitor_THT:C_Rect_L10.3mm_W4.5mm_P7.50mm_MKS4 | C2 |
| 1 | C_Small | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C9 |
| 1 | IR2110 | Package_DIP:DIP-14_W7.62mm | U5 |
| 1 | L | Inductor_THT:L_Axial_L5.0mm_D3.6mm_P10.00mm_Horizontal_Murata_BL01RN1A2A2 | L1 |
| 1 | L7806 | Package_TO_SOT_THT:TO-220-3_Vertical | U6 |
| 1 | LM386 | Package_DIP:DIP-8_W7.62mm | U3 |
| 1 | LM393 | Package_DIP:DIP-8_W7.62mm | U2 |
| 1 | LM7812_TO220 | Package_TO_SOT_THT:TO-220-3_Vertical | U7 |
| 1 | LOGO | LOGO | G*** |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm | U1 |
Questions
How big is the Class DAmp PCB?
It measures 85 × 48 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Class DAmp use?
32 parts, built around the IR2110L4, LM386, 74HC04D and LM393. 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 Class DAmp KiCad files?
From the Shift-delete0/Class_D_Amplifier repository on GitHub, at the commit this page was made from: the board is Class D amplifier/Design_Files(KiCad)/Class-DAmp.kicad_pcb and its schematic Class D amplifier/Design_Files(KiCad)/Class-DAmp.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Class DAmp design in my own project?
Its repository states no licence, so its author keeps all rights: ask Shift-delete0 before reusing the design.
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