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STD Audio power amplifier with tda2050
Audio power amplifier with tda2050
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Update time：
2024-03-09 20:54:20
Creation time：
2015-09-03 08:24:26
Description
Description
This project is an audio amplifier based on TDA2050 and LM1875.
Description
This is not an ordinary project, but an attempt to make a PCB that is suitable for TDA2050 andLM1875 and has all the necessary circuitry on board – power supply, speaker protection, delayed turn-on and fast turn-off. This is achieved using the convenient uPC1237 IC.
TDA2050 and LM1875 are pin to pin compatible, the differences in their schematics are the values of a couple resistors and one capacitor. All this allows to make an universal circuit board, suitable for any of these two ICs.
It is 2x30W, but it depend of the power supply voltage and the impedance of the speakers connected to the output.
From:http://www.electronics-lab.com/project/audio-power-amplifier-with-tda2050/
Design Drawing
Design Drawing
schematic diagram
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PCB
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | LM1875 | IC1,IC2 | T05D | 2 |
| 2 | 1000uF | C3_L,C5_L,C3_R,C5_R | RB-3.5/8 | 4 |
| 3 | 100nF | C2_L,C4_L,C2_R,C4_R | CAP-5MM | 4 |
| 4 | 20k | RF_L,RF_R | AXIAL-0.4 | 2 |
| 5 | 1k | RI_L,RI_R | AX0.2 | 2 |
| 6 | 22k | R2_L,R2_R | AXIAL-0.4 | 2 |
| 7 | 2.2nF | C1_L,C1_R | CAP-0.2 | 2 |
| 8 | 1M | R1_L,R1_R | AXIAL-0.4 | 2 |
| 9 | Header1X2 | J1,J2 | TJC2-2芯 | 2 |
| 10 | 22uF | CI_L,CI_R,C20 | RB-3.5/8 | 3 |
| 11 | 120k | R13,R12 | AXIAL-0.4 | 2 |
| 12 | 1R | R3_L,R3_R | AX0.2 | 2 |
| 13 | 220nF | C6_L,C6_R | CAP-0.7 | 2 |
| 14 | 91K | R17 | AXIAL-0.4 | 1 |
| 15 | UPC12371 | IC3 | IP8 | 1 |
| 16 | 22nF | C21 | CAP-5MM | 1 |
| 17 | H 2S | JP1 | Header2 | 1 |
| 18 | AC | J3 | 5.08 HXH | 1 |
| 19 | KBU8M | B1 | KBU8M | 1 |
| 20 | 4700uF | C17,C18 | RB0.5/1.0 | 2 |
| 21 | Powerv LED | D1 | 1X02_2.54_SCREWTERM | 1 |
| 22 | 2K2 | R11,R16 | AXIAL-0.4 | 2 |
| 23 | 1N4148 | D5 | DO35-7 | 1 |
| 24 | 4.7uF | C13 | RB2/6 | 1 |
| 25 | 47uF | C19 | RB-3.5/8 | 1 |
| 26 | 56K | R14 | AXIAL-0.4 | 1 |
| 27 | 9K1 | R15 | AXIAL-0.4 | 1 |
| 28 | 1N4004 | D6 | DO-41 | 1 |
| 29 | BZX85C12V | D7 | DO-41 | 1 |
| 30 | 68K | R19,R20 | AXIAL-0.4 | 2 |
| 31 | 10K | R21 | AXIAL-0.4 | 1 |
| 32 | BC547 | Q1 | TO-92 | 1 |
| 33 | 330R | R18 | AXIAL-0.4 | 1 |
| 34 | Protection LED | D2 | 1X02_2.54_SCREWTERM | 1 |
| 35 | RELAY_2 | K1 | Relay 2联 2常开2常闭 | 1 |
| 36 | Header 2S | D4,D3 | 1X02_2.54_SCREWTERM | 2 |
| 37 | 安装孔 | U1 | 安装孔 | 1 |
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