TDA2050 IC Circuit Diagram

The TDA2050 IC is reasonably sufficient to build an excellent performance audio amplifier for home use or sale at a low cost. The TDA2050 IC is an operational amplifier with high current flow capability. Twenty transistors are inside the IC or internal circuit for very low-distortion sound output.

The TDA2050 IC can sound output 50 watts according to IEC268.3 music power rules or audio power measurement techniques. This IC's True RMS power output is a maximum of 35 watts in an 8-ohm speaker load and can deliver 50 watts into a 4-ohm load.

The internal circuit of the TDA2050 IC is designed and constructed in such a technical manner that results in the following advantages:

• Low harmonic distortion
• Low crossover distortion
• Thermal shutdown protection
• Short Circuit protection
• 100 Hz to 15 kHz Audio Frequency coverage
• High operating voltage for bass boost benefits

I have purchased several TDA2050 IC amplifier boards from the market many times, but due to some technical mistakes in their PCB design, distortion, humming, and noise have been observed with the sound, but they have yet to make any mistake in the circuit. However, if you build a single or dual-power audio amplifier with this IC, I've outlined how to solve the audio distortion problem below.

TDA2050 IC Single Power Audio Amplifier Schematic Circuit Diagram

Part 1 in the figure below is the circuit diagram of a TDA2050 IC single-power audio amplifier. I recommend a minimum of 12V DC to a maximum of 22V DC applied to the VCC of this circuit. To get noiseless and hummingless sound output, capacitors C4 and C5 should be connected very close to the TDA2050 IC.

Figure 2 shows how to make the positive supply (+VS) connection for both dual and single power circuits, which are indicated as (+VS here and +VS not here). GND2 is the ground of the amplifier's input section, and the other GNDs are of the output section.

If you install the circuit board in a metal cabinet, solder one wire of the GND2 connection of the TDA2050 circuit board to the very front of the cabinet and the other GNDs to the back of the cabinet.

Capacitors and Resistors values ​​of TDA2050 IC circuit diagram (Single Power)

R1 - 2.2Ω - 2Watt. R2 - 22KΩ. R3 - 680Ω. R4,R5,R6 - 22KΩ.
C1 - 1000µF. C2 - 0.47µF (474), C3 - 22µF, C4 - C4 - 1000µF, C5 - 0.1µF (104), C6 - 47µF, C7 - 2.2µF. C8 - 1000 PF (102)

TDA2050 IC Circuit Diagram Dial and Single power

TDA2050 IC Dual Power Audio Amplifier Schematic Circuit Diagram

Part 2 in the figure above is the dual-power audio amplifier schematic circuit diagram of the TDA2050 IC. The wiring technique of the amplifier board will be similar to that of the single power circuit, which we have discussed in the above paragraph.

The power supply of the TDA2050 IC dual power audio amplifier circuit board should be a minimum of DC 12-0-12 volts and a maximum of DC 22-0-22 volts. TDA2050 IC will be durable if the secondary power transformer is AC 18-0-18 volts for maximum voltage application; that's from my experience.

Components Value of TDA2050 IC Dual Power Audio Amplifier Circuit Diagram

Main Filter Capacitor of Bridge Rectifier Circuit: FC1 and FC2 is 4700µF 50V.
C3, C4 - 1000µF. C5, C6 - 0.1µF (104). C7 - 2.2µF
R1 - 2.2Ω -2Watt. R2, R3 - 22KΩ, R4 - 1.5KΩ, R5 - 680Ω.

How to solve noise or humming sound problems in the TDA2050 IC amplifier

Generally, any audio amplifier has four sections: audio input section, audio driver section, feedback section, and audio output section. From this to the ground area of ​​the audio output section, some harmonic signal from the audio output gets mixed with the ground. As a result, the ground or negative supply is not pure DC, so noise or humming is produced with the sound output. That is why the distance between the ground print of the audio output and the input section should be kept while designing the PCB.

If you install the circuit board in a metal cabinet, solder one wire of the GND2 connection of the TDA2050 circuit board to the very front of the cabinet and the other GNDs to the back of the cabinet. Moreover, if there is humming with the audio sound, the filter capacitors should be checked.

How to fix TDA2050 IC overheating

The TDA2050 IC has a power dissipation of 25 watts, so if the voltage limit is exceeded, the IC will heat up due to excess current flow. A maximum AC 18-0-18 volt transformer for dual power amplifiers is best in this case.

TDA2050 Subwoofer Circuit Diagram

If you build a subwoofer amplifier circuit with TDA2050 IC, the heavy sound bits of low audio bass boost frequency will be exciting. In the next post, I will publish my tested and modified TDA2050 subwoofer circuit diagram.