HardLabs

Digital amplifier2

bybzmt·practise·mcu/digital-amplifier2/circuit/main/digital-amplifier2.kicad_pcb

Digital amplifier2 PCB layout, top view — open source STM32 board by bybzmt

About the Digital amplifier2 PCB

Digital amplifier2 is an open source STM32 PCB design by bybzmt, published on GitHub. It is a 4-layer board measuring 94 × 120 mm, with 233 components from 73 distinct parts.

Its main chip is the STM32F446RETx, from the STM32 family. Other key parts include the TPS55340, AMS1117-3.3, TPA6120A2, PCM1792A and OPA4134. By type, the board carries 123 capacitors, 63 resistors, 13 ICs, 12 inductors, 10 diodes and 6 connectors.

It belongs with the audio designs in this gallery.

Main components on the Digital amplifier2

STM32F446RETxTPS55340AMS1117-3.3TPA6120A2PCM1792AOPA4134SJR-BTM331DLT11H0AMS1117-5.0TL431DBZtas5805m

Digital amplifier2 bill of materials (BOM)

233 components, 73 distinct parts.

QtyPartRefs
1
STM32F446RETx
U1
2
TPS55340
U2, U10
1
AMS1117-3.3
U3
1
TPA6120A2
U4
1
PCM1792A
U5
1
OPA4134
U6
1
SJR-BTM331
U7
1
DLT11H0
U8
1
AMS1117-5.0
U9
1
TL431DBZ
U11
2
tas5805m
U15, U16
1
s8550
Q1
1
5032 8m
Y1
1
USB_C_Receptacle_USB2.0
J1
1
Barrel_Jack_Switch
J2
1
AudioJack3_Switch
J3
1
0.96_oled
J4
1
PW_OUT
J7
1
swd_pcb_2.54
j1
1
Antenna_Shield
AE1
Show 53 more
QtyPartRefs
1
MS621FE-FL11E
BT1
1
ec11
SW1
1
Transformer_diy_02
T1
1
led1
D1
1
led2
D2
7
ss34
D3, D4, D5, D6, D7, D8, D9
1
SD103AWS
D10
2
22uh / 0630
L1, L2
5
2.2uh / 0805
L3, L5, L6, L9, L10
1
4.7uh / 0630
L4
4
10uh
L13, L14, L15, L16
3
4.7uf
C1, C104, C114
7
10uf
C2, C35, C39, C41, C43, C45, C97
30
100nf
C3, C4, C5, C6, C7, C8, C9, C14 +22
2
12pf
C10, C11
13
10uf
C12, C15, C25, C26, C31, C32, C51, C53 +5
2
47nf
C13, C59
1
2.2uf
C16
2
1uf
C17, C60
19
22uf
C18, C19, C21, C22, C55, C67, C68, C69 +11
5
100nf
C20, C71, C72, C82, C83
10
47uf
C23, C24, C29, C30, C66, C77, C100, C101 +2
2
47uf
C37, C38
4
2.7nf
C47, C48, C49, C50
2
NC
C63, C99
2
220uf
C75, C76
1
2200uf
C89
6
1uf
C95, C96, C116, C117, C118, C119
8
220nf
C120, C121, C122, C123, C124, C125, C126, C127
4
680nf
C128, C129, C130, C131
5
9.53k
R1, R4, R30, R41, R42
1
9.53kΩ
R2
6
0Ω
R3, R22, R25, R39, R46, R62
7
9.53k
R5, R23, R59, R60, R61, R63, R65
1
1mΩ
R6
2
43k
R7, R43
2
2.37k
R8, R45
2
10k
R9, R44
14
1k
R10, R12, R13, R14, R15, R16, R17, R18 +6
1
5k
R11
2
39.2Ω
R20, R21
6
10k
R24, R40, R47, R49, R55, R56
1
0
R31
1
1.5k
R32
2
12Ω
R33, R34
1
22k
R35
2
5.1k
R36, R57
2
4.7k
R37, R38
1
11k
R50
1
1k
R51
1
760k
R58
1
15k
R67
1
47k
R68

Digital amplifier2 design files

The KiCad project lives in the bybzmt/practise repository on GitHub; these links point at the commit this page was built from.

Digital amplifier2: common questions

What microcontroller does the Digital amplifier2 use?

The Digital amplifier2 is built around the STM32F446RETx, from the STM32 family.

How big is the Digital amplifier2 PCB?

The Digital amplifier2 measures 94 × 120 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Digital amplifier2?

233 components, from 73 distinct parts. The full bill of materials is listed on this page.

Where can I download the Digital amplifier2 design files?

From the bybzmt/practise repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Digital amplifier2 design in my own project?

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

Can I test firmware for the Digital amplifier2 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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