D-Class Amplifier
About the D-Class Amplifier PCB
D-Class Amplifier is an open source PCB design by Niels-Clayton, published on GitHub. It is a 2-layer board measuring 180 × 65 mm, with 71 components from 44 distinct parts.
Other key parts include the NCP1117DT12G, MCP1799T-5002H/TT, LM324DR, TL972IDR and LMV393S-13. By type, the board carries 24 capacitors, 20 resistors, 7 ICs, 4 transistors, 2 connectors and 2 diodes.
It belongs with the audio designs in this gallery.
From the project
ECEN405 Class-D amplifier group project
- Daniel Eisen - Nickolai Wolfe - Niels Clayton
- The input stage will use two active filters, a 10Hz corner frequency high pass filter, and a 200Hz corner frequency low pass filter. This will provide an overall filter passband of 10Hz - 200Hz.
- It is important to be able to effectively filter out the switching frequency of the sinusoidal pulse width modulated (SPWM) signal output. because of this, we want to ensure that the switching frequency is at least two decades above the maximum output frequency. This will ensure an attenuation of at least 40dB of the switching noise by the output…
Main components on the D-Class Amplifier
D-Class Amplifier bill of materials (BOM)
71 components, 44 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | NCP1117DT12G NCP1117-12_TO252 | TO-252-2 | U101 |
| 1 | MCP1799T-5002H/TT MCP1799T-5002H_TT | SOT-23_Handsoldering | U102 |
| 1 | LM324DR LM324 | SOIC-14_3.9x8.7mm_P1.27mm | U201 |
| 1 | TL972IDR TL972 | SOIC-8_3.9x4.9mm_P1.27mm | U301 |
| 1 | LMV393S-13 LMV393 | SOIC-8_3.9x4.9mm_P1.27mm | U302 |
| 2 | IR21834SPBF IR21834 | SOIC-14_3.9x8.7mm_P1.27mm | U501, U502 |
| 4 | PHP23NQ11T | PHP23NQ11T | Q501, Q502, Q503, Q504 |
| 1 | P_IN | BarrelJack_Horizontal | J101 |
| 1 | AudioJack2 | CUI_MJ-63022A | J102 |
| 1 | Input Signal | sine | G101 |
| 1 | SPWM | SPWM | G102 |
| 1 | Output Signal | sine | G103 |
| 1 | Thumb | thumb | G104 |
| 1 | Square Wave | square | G105 |
| 1 | Triangle Wave | triangle | G106 |
| 1 | Speaker | Speaker | LS101 |
| 1 | CT6EP203 20k | Potentiometer_Vishay_T73YP_Vertical | RV201 |
| 1 | CT6EP502 5k | Potentiometer_Vishay_T73YP_Vertical | RV301 |
| 1 | CT6EP102 1k | Potentiometer_Vishay_T73YP_Vertical | RV302 |
| 2 | UG1B-E3/54 SMD1150PL-TP | D_SOD-123F | D501, D502 |
Show 24 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | HCTI-150-5.0 150u | IND_HCTI-150-5.0 | L401, L402 |
| 4 | CL21A106KOQNNWE 10u 16V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C101, C102, C501, C504 |
| 2 | 885012207051 1u 16V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C103, C105 |
| 1 | UVR1H102MHD1TO 1000u 50V | CP_Radial_D10.0mm_P5.00mm | C104 |
| 1 | 100u 6.3V | CP_Elec_4x5.4 | C106 |
| 5 | 885012207045 100n 16V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C201, C204, C208, C301, C303 |
| 1 | 865080142007 100u 6.3V | CP_Elec_4x5.4 | C202 |
| 1 | CL21B154KOANNNC 150n 16V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C203 |
| 1 | L21A225KOFNNNE 2.2u 16V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C205 |
| 1 | CL21B684KOFNNNG 680n 16V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C206 |
| 1 | C0805C125K4PAC7800 1.2u 16V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C207 |
| 1 | 885012207040 15n 16V | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | C302 |
| 2 | 865080640001 1u 50V | CP_Elec_4x5.4 | C401, C402 |
| 1 | C4AQJLU5100M19J 10u 700V | C4AQJLU5100M19J_film_capacitor | C403 |
| 2 | CL21B474KBFNNNG 0.47u 50V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C502, C503 |
| 7 | RC0805JR-0710KL 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R101, R102, R201, R204, R301, R501, R506 |
| 1 | RC0805JR-074K3L 4.3k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R202 |
| 1 | RC0805JR-075K6L 5.6k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R203 |
| 1 | CRCW08051K50FKEAC 1.5k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R205 |
| 1 | ERA-6AED242V 2.4k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R206 |
| 1 | RC0805JR-078K2L 8.2k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R207 |
| 1 | RC0805JR-0715KL 15k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R208 |
| 3 | RC0805JR-0710KL 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R302, R303, R304 |
| 4 | ERJ-6ENF10R0V 10 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R502, R503, R504, R505 |
D-Class Amplifier design files
The KiCad project lives in the Niels-Clayton/D-Class_Amplifier repository on GitHub; these links point at the commit this page was built from.
D-Class Amplifier: common questions
How big is the D-Class Amplifier PCB?
The D-Class Amplifier measures 180 × 65 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the D-Class Amplifier?
71 components, from 44 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 D-Class Amplifier design files?
From the Niels-Clayton/D-Class_Amplifier repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the D-Class Amplifier design in my own project?
The repository has no license, so all rights stay with Niels-Clayton. Use it as a reference, and ask the author before reusing the design.
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