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Amp 2x4Ohm

4 years ago 874
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A simple dual TPA3122D2-based amp with mute switches. One chip is designed to run in bridged-mode, the other one runs single-ended.

The PCB is designed for home etching, the red traces are jumper links.

No liability for lab-explosions or bursted ear drums ;)





ID Name Designator Footprint Quantity
1 TPA3122D2N U1,U3 DIP20 2
2 SIP1 P1,P2,P3,P4,P5,P6,P9,P10,P7,P8 Round Connector 10
3 1u C1,C4,C5,C8,C14,C17 C1 6
4 1m C2 D5.1 r5.1 elec. Cap 1
5 .1u C3 C1 1
6 0.22u C6,C7,C15,C16 C1 4
7 SPDT Switch U2,U4 SPDT Switch 2
8 22u L1,L2,L3,L4 D5.1 r4 Ind. 4
9 .68u C9,C10,C18,C19 C1 4
10 10u C11,C12 D2.5 r2.5 elec. Cap 2
11 4.7k R1,R3 Comp. 0.6w Resistor 2
12 4.7k R2,R4 Vert. 0.6w Resistor 2
13 10k R5 Std. 0.6w Resistor 1


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