For more information about TDA2003, please click here to get the TDA2003 Details PDF as well as its EDA/CAD TDA2003 PCB Footprint and Symbol. Worldway strictly buy TDA2003 excess stock authorized and source from Franchise, so you can be rest assured order TDA2003 from Worldway. The TDA2003 is an Audio Amplifier IC from ST Microelectronics with a maximum output power of 10W commonly used in stereo amplification in car Radio. The IC can output a maximum current of 3.5A and features very low harmonic and crossover distortion. TDA2003 amplifier circuits TDA2003 is a cheap amplifier that is designed to run on single rail power supplies (unipolar). It provides a high output current capability (up to 3.5A), very low harmonic and cross-over distortion. TDA2003 10W car radio audio amplifier.

If you would like to build a HI-FI power amplifier project that power output size about 30 watts to 50 watts or 75 watts at 8 ohms loudspeaker, and is high-quality sound and easy to build (not too many components).

We recommend you use TDA2050 class AB OCL amplifier circuits. Below that builds with the integrated circuit, PCB layout and no need for any customization. Parts used in this circuit are easily available in most of the local markets.

TDA2050 datasheet

The TDA2050 is class AB audio amplifier. Its high power capability the TDA2050 is able to provide up to 35W true rms power into speaker 4 ohm load at THD =10%, VS =±18V, f = 1KHz and up to 32W into 8ohm load @THD = 10%, VS = 22V, f = 1KHz.Moreover, the TDA 2050 delivers typically 50W

The schematic diagram

The music power into the 4-ohm load over 1 sec at VS=22.5V, f = 1KHz
May take an interest want to try build already, try out this circuit use voltage Vcc +/- 25V.

Here is TDA2050 I found on Amazon Read more

35 watts TDA2050 Amplifier mono

I know you want to see an example circuit. Here is a simple circuit.

Ready to get started?

Look:

Circuit diagram of 35 watts amplifier using TDA2050.

22V Dual Power Supply circuit for 35W amplifier.

Parts you will need

Electrolytic Capacitors
C1: 0.47 to 22uF 50V
C2: 22uF 35V
C6, C7: 2,200uF 50V

Mylar or Ceramic Capacitors
C3,C4: 0.1uF 50V
C5: 0.15uF or 0.1uF 63V
C8, C9: 0.1uF 63V

0.25W Resistors, 5% tolerance
R1, R3: 47K
R2: 1 to 3.3K or 680 ohms
R4: 1 to 4.7 ohms

PCB : 35W Hi-Fi AUDIO POWER AMPLIFIER by TDA2050

on PCB : 35W Hi-Fi AUDIO POWER AMPLIFIER by TDA2050

50W-75W Stereo power amplifier using TDA2050

We used the TDA2030 to build many power amplifier projects, but they have lower power than 30 watts.

Today, we try to use the TDA2050, which has the output power about 50 watts that shape and easy to use as well.

This project is stereo that easy to builds can adjust volume, tone and balanced sound.

First of all, we look at the circuit diagram below.
This circuit with a high current so takes low voltage 25V similar the normal 30 watts amplifier.

Figure 1: the 35W + 35W stereo power amplifier circuit using TDA2050

We should use the 25V CT -25V high current power supply circuit with RFI filter system. Which have 4 x 2,200uF 50V are connected together in parallel.

Figure 2: the 25V CT -25V Dual power supply of this projects

We can boost up power output to 75 watts by the same voltage power supply.
In the circuit, we use both transistors 2N3055 NPN types and MJ2955 PNP type to increase current up.

Figure 3: the 50W + 50W (Max75W) stereo power amplifier project using TDA2050 and 2N3055-MJ2955

How to build
We do not need to explain a lot. Lets to build this project better.

Figure 4 the PCB layouts.

Figure 5 the component layout of this projects

Parts you will need

IC1, IC2: TDA2050

Tda2003 Circuit

Cr: amazon.com by kunwangaetc

0.5W resistors, 5% Tolerance
R1, R8: 5.6K
R2, R9: 47K
R3, R18: 2.7K
R4, R11: 22K
R5, R12: 680 ohms
R6, R13: 22K
R7, R14: 1 ohms
R01, R02, R03, R04: 10 ohms 5W Resistors

Ceramic Capacitors
C1, C10: 47nF(0.047uF) 50V
C2, C4, C11, C13: 2.2nF(0.0022uF) 50V
C3, C7, C8, C9, C12, C16: 0.1uF 50V

Electrolytic Capacitors
C5, C14: 1uF 50V
C19, C20: 2,200uF 50V
C21: 2,200uF 80V

P1: 100KB, Dual Audio Potentiometer
P2: 100KA, Dual Audio Potentiometer
P3: 100K, Audio Potentiometer

Q1, Q3: MJ2955, PNP transistors
Q2, Q4: 2N3055, NPN transistors

Tda2003 Pin

Note:
On Figure 1 and Figure 3
R5,R12: 680 ohms, 0.5W Resistors 5%
R6,R13: 22K, 0.5W Resistors 5%

You can use TIP3055 instead of the 2N3055 and TIP2955 instead of MJ2955 because easy to use.

Tda2003 Pcb Layout

Tda2003 Pcb Board

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