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The pins connections 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. 35 watts TDA2050 Amplifier mono Part C1-0,47-22mF C2-22mF C3C4-100nF C5-100(150)nF R1R3-47kO R2-1-3,3kO R4-1-4,7oM/0,25W Rt-4oM 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 50W + 50W 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 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 75W + 75W 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. The TDA2050 is a very well designed power amplifier. However, in the foregoing, there are various suggestions regarding enhancing its output power. I have found that the TDA2050 can sink/source 5 Amps maximum. If built into a bridge configuration and driving an 8 ohm speaker, the peak power for such a configuration is 5 x 5 x 8 (i.e.

I*I*R) which is around 200 Watts peak, namely around 130 Watt RMS into an 8 ohm load. Such a configuration works well in practice, both with split rail power supplies and with single rail power supplies. The advantage of a bridge configuration is avoiding a need for the output electrolytic capacitor which, if too large (i.e. Grater than 1000 uF for supply rails in excess of 40 volts total from VS+ to VS-), and also not by-passed via blocking diodes to the VS supply rail(s), can cause failure of the TDA2050 (see its data sheet for more guidance).

In operation, the TDA2050 provides very low distortion over most of its operating range, but needs to have a 022 uF plate ceramic capacitor strapped across its VS- to VS+ pins (as close to the IC as possible), otherwise it has a tendency to oscillate parasitically at a very high frequency (e,g, several MHz). Hope above is useful to you! Kind regards Dr Tim •. Typos in my previous comment: 0.22 uF plate ceramic strapped as close as possible to IC to avoid parasitic oscillations. Note that the TDA2050 is rated at 50 volts absolute maximum supply rail, so running it on +/- 25 volts (as suggested above by other contributors) is perhaps a bit risky; LM1875 can be run to 60 volts total supply rail, but its output current is limited to 4 Amps. My experience with many many TDA2050 that I have used, is to limit the total supply rail to 45 volts maximum (providing a few volts safety margin). Kind regards Tim •.