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AMP3886

dmsd-lab·AMP8611·3886_3/3886_3.kicad_pcb

AMP3886 PCB layout, top view — open source board by dmsd-lab

About the AMP3886 PCB

AMP3886 is an open source PCB design by dmsd-lab, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 95 × 78 mm, with 59 components from 36 distinct parts.

Other key parts include the LM3886TF. By type, the board carries 24 capacitors, 21 resistors, 5 diodes, 3 transistors, 3 connectors and 2 fuses.

It belongs with the audio designs in this gallery.

From the project

AMP8611 - Integrated Stereo Power Amplifier with a 2-channel input selector, PGA2311 digital volume control and LM3886 power stages

Open hardware project under CERN-OHL-S v2 license

Amplifier combining a 2-channel input selector, PGA2311 digital volume control and 45W per-channel LM3886 output stages.

Full documentation (description pdf, Kicad project schematic and PCB, Gerber files, BOM, STM32 firmware) is available in the repository.

Key Specifications: - Input resistance: 10kΩ; - Nominal input voltage: 0.85Vrms; - Maximum input voltage: 2.5Vrms; - Input Channels isolation: 95dB; - Maximum output power: 2 x 45W RMS (1kHz sinusoidal, 4ohm load); - Bandwidth (-3dB): 20Hz – 90kHz; - Volume control: -80 to +12dB; -…

AMP3886, from the project README
From the project README

Main components on the AMP3886

LM3886TF

AMP3886 bill of materials (BOM)

59 components, 36 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM3886TF
U101
1
BT139-600E
Q101
1
BC817
Q102
1
BC807
Q103
2
2
J101, J102
1
3
J103
2
3A
F101, F102
2
1N4148W
D101, D102
1
LED red
D103
1
LED green
D104
1
KBU1010
D105
1
1.5U
1.5u
C101
1
220P
220p
C102
2
4.7U
4.7u
C103, C104
1
220P
220p
C105
1
33P
33p
C106
3
100U
100u
C107, C109, C115
1
68N
68n
C108
5
10U
10u
C110, C111, C112, C113, C114
2
6800U
6800u
C116, C117
Show 16 more
QtyPartRefs
2
470U
470u
C118, C119
2
100N
100n
C120, C121
2
1u
C122, C123
1
100n 100V
C124
3
0
R101, R115, R116
2
33k 1%
R102, R105
2
2.2k 1%
R103, R104
2
22K
22k
R106, R108
1
3.3 2W
R107
1
10 3W
R109
1
0.47 3W
R110
3
1k
R111, R112, R113
1
47K
47k
R114
2
10K
10k
R117, R118
2
1
R119, R120
1
0
R121

AMP3886 design files

The KiCad project lives in the dmsd-lab/AMP8611 repository on GitHub; these links point at the commit this page was built from.

AMP3886: common questions

How big is the AMP3886 PCB?

The AMP3886 measures 95 × 78 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the AMP3886?

59 components, from 36 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 AMP3886 design files?

From the dmsd-lab/AMP8611 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 AMP3886 design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which dmsd-lab chose for the repository.

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