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.
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 = ï‚±22V, f = 1KHz.Moreover, the TDA 2050 delivers typically 50W
The pins connections
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.
35 watts TDA2050 Amplifier mono
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.
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.
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.
How to build
We do not need to explain a lot. Lets to build this project better.
Parts you will need
R1,R8______5.6K_____0.5 watts resistors
R5,R12____680 ohms __”___________”
R01,R02,R03,R04__10 ohms 5W Resistors
C1,C10_______47nF(0.047uF) 50V__________Ceramic capacitors
C2,C4,C11,C13_______2.2nF(0.0022uF) 50V___Ceramic capacitors
C3,C7,C8,C9,C12,C16_______0.1uF 50V____________Ceramic capacitors
C5,C14_______1uF 50V Electrolytic capacitors
C17,C18_____2,200uF 50V Electrolytic capacitors
P1______100KB____Dual Audio Potentiometer
P2______100KA____Dual Audio Potentiometer
On Figure 1 and Figure 3
R5,R12____680 ohms ____0.5 watts___Resistors 5%
R6,R13____22K _________0.5 watts___Resistors 5%
You can use TIP3055 instead of the 2N3055 and TIP2955 instead of MJ2955 because easy to use.
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