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DIY-amplifier

adamkral20-svg·DIY-amplifier·hardware/DIY amplifier.kicad_pcb

DIY-amplifier PCB layout, top view — open source board by adamkral20-svg

About the DIY-amplifier PCB

DIY-amplifier is an open source PCB design by adamkral20-svg, published on GitHub. It is a 4-layer board measuring 90.9 × 71.6 mm, with 91 components from 42 distinct parts.

Other key parts include the 74LVC1G14, OPA310SXDBV, HIP4081A, 74LVC1G17 and L7805. By type, the board carries 29 capacitors, 29 resistors, 11 ICs, 10 transistors, 4 diodes and 3 connectors.

It belongs with the audio designs in this gallery.

From the project

Custom class-d amplifier board

It uses 4 MOSFETS in an H-bridge configuration, allowing for BTL output and thus higher power from lower supply voltage. The main part is the HIP-4081A H-bridge MOSFET gate driver. It can reliably drive the MOSFETS in the hundreds of kHz switching speed.

The onboard discrete oscillator should be around 200kHz. It uses a pnp constant current source connected to a capacitor, and a MOSFET to discharge the capacitor quickly to generate a Ramp wave. The MOSFET has 0.7nC gate charge, so the TLV3501 can reliably drive it with its output current capability.

DIY-amplifier, from the project README
From the project README

Main components on the DIY-amplifier

74LVC1G14OPA310SXDBVHIP4081A74LVC1G17L7805L7812TLV3501AIDBVMCP6561UINA181

DIY-amplifier bill of materials (BOM)

91 components, 42 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
74LVC1G14
U1, U11
1
OPA310SXDBV
OPA310SxDBV
U2
1
HIP4081A
U3
2
74LVC1G17
U4, U9
1
L7805
U5
1
L7812
U6
1
TLV3501AIDBV
U7
1
MCP6561U
U8
1
INA181
U10
4
IRF540N
Q1, Q2, Q3, Q4
1
DMN2310U
Q5
3
BC858
Q6, Q7, Q9
1
BC848
Q8
1
PJA3431
Q10
1
AUDIOPLUG3
AudioPlug3
J1
1
Output
J2
1
Input
J3
1
6A
F1
1
68K
68k
RV1
1
SW_Push
SW1
Show 22 more
QtyPartRefs
2
CDBA3100-HF
D1, D2
2
1N4148WT
D4, D5
2
47U
47u
L1, L2
1
1n
C1
11
0.1U
0.1u
C2, C4, C6, C7, C8, C9, C10, C24 +3
3
10U
10u
C3, C5, C35
4
0.1U
0.1u
C11, C18, C20, C21
2
10U
10u
C12, C17
4
1000U
1000u
C13, C15, C19, C26
2
100U
100u
C14, C16
2
1.5U
1.5u
C22, C23
1
2.7K
2.7k
R1
1
3.3K
3.3k
R2
13
10K
10k
R3, R9, R11, R16, R17, R20, R22, R23 +5
2
470
R4, R25
2
220K
220k
R5, R6
4
10
R7, R8, R18, R19
1
150
R10
1
100K
100k
R12
1
81K
81k
R13
2
22K
22k
R14, R15
1
0.03
R21

DIY-amplifier design files

The KiCad project lives in the adamkral20-svg/DIY-amplifier repository on GitHub; these links point at the commit this page was built from.

DIY-amplifier: common questions

How big is the DIY-amplifier PCB?

The DIY-amplifier measures 90.9 × 71.6 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the DIY-amplifier?

91 components, from 42 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 DIY-amplifier design files?

From the adamkral20-svg/DIY-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 DIY-amplifier design in my own project?

The repository has no license, so all rights stay with adamkral20-svg. Use it as a reference, and ask the author before reusing the design.

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