If you want to build hi-fi power amplifier the size about 30watt to 50Watt or 75 watt at good sound and build easy. I recommend you use TDA2050 amplifier circuits below that builds with the integrated circuit and PCB layout.
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 music power into 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 balance sound.
First of all, we look at the circuit diagram below.
This circuit with high current, so take 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 same voltage power supply.
In 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.
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.