32W Hi-Fi Audio Amplifier using TDA2050 IC + Power Supply

HI-FI 32W Sound Amplifier: TDA2050 - Simple Power Supply + PCB — HI-FI 32W Sound Amplifier: TDA2050 – Simple Power Supply + PCB

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Hello, audio enthusiasts!

If you’re looking for power and exceptional sound quality in an affordable project, this article is for you. Today we’ll explore in detail the 32W Hi-Fi audio amplifier developed with the renowned TDA2050 IC from ST Microelectronics – a circuit that has become a reference among hobbyists and electronics professionals.

This project combines high-fidelity sound, low distortion levels, and simplified assembly, making it one of the most popular options for those who want to build a professional-quality audio system without spending a fortune. Get ready to dive into the world of high-quality audio amplification!

🔬 What is the TDA2050 and Why is it So Special?

The TDA2050 is a 32W monolithic class AB audio amplifier integrated circuit, available in the PentaWatt package. This component stands out for its ability to deliver significant power with minimal distortion, making it ideal for high-quality Hi-Fi projects.

Think of the TDA2050 as the heart of your audio system, just as a human heart efficiently pumps blood throughout the body, this IC pumps audio signals with clarity and precision to your speakers, ensuring an immersive sound experience faithful to the original recording.

Fig. 2 – TDA2050 Integrated Circuit Pinout

📌 Key Features of the TDA2050

The TDA2050 stands out in the market for several technical reasons that make it a superior choice for high-quality audio projects:

High output power: Capable of delivering up to 32W RMS at 8 ohm load
50W Music Power: According to IEC 268.3 standards
High operating voltage: Supports up to 50V power supply
Power supply flexibility: Operates with single or split supply
Extremely low harmonic distortion: THD of only 0.05% typical
Short-circuit protection: Between output and ground
Thermal protection: Automatic shutdown in case of overheating

But that’s not all. What really sets the TDA2050 apart is its ability to maintain sound quality even at high volumes – something that many more expensive amplifiers cannot achieve.

🔧 Detailed Technical Specifications

For enthusiasts who love numbers, here are the technical specifications that make the TDA2050 stand out:

At 4 ohm load: Up to 35W @ THD = 10%, VS = ± 18V, f = 1KHz
At 8 ohm load: Up to 32W @ THD = 10%, VS = ± 22V, f = 1KHz
At 4 ohm load (peak): Up to 50W for 1 second at VS = 22.5V, f = 1KHz
Harmonic distortion: THD = 0.05% typical @ VS = ± 22V, PO = 0.1 to 15W, RL = 8ohm, f = 100Hz to 15KHz

These numbers translate into crystal-clear audio, with deep bass, crisp trebles, and mids that preserve all the details of the original recording – exactly what we expect from a high-quality Hi-Fi system.

🔌 Circuit Schematic Diagram!

In Figure 2 below, we present a diagram of the 32W HI-FI Sound Amplifier circuit with TDA2050 for clear visualization of the connection between components.

For a complete stereo system, simply assemble two identical circuits, one for each channel (left and right). This modular approach offers flexibility and facilitates system maintenance.

Fig. 3 – Schematic Diagram of the HI-FI 32W Amplifier with TDA2050

💡 Ideas for Your Next Project

Did you like this project? Then you’ll love exploring other circuits we’ve prepared. Each with its own characteristics and ideal applications!

🛠️ Component List

Here is the complete list of components you will need to assemble this amplifier. I recommend using exactly the specified values to ensure the best possible performance:

Component	Specification
U1	TDA2050 Integrated Circuit
R1, R2, R3, R5	22KΩ 1/4W Resistor
R4	680Ω 1/4W Resistor
R6	2.2Ω 1/4W Resistor
C1	2.2uF / 25V Electrolytic Capacitor
C2	100uF / 25V Electrolytic Capacitor
C3, C7	1000uF / 50V Electrolytic Capacitor
C4	22uF / 25V Electrolytic Capacitor
C5	100nF Polyester Capacitor
C6	0.47uF Polyester Capacitor
RP1	47KΩ Potentiometer
P1, P2, P3	Screw Terminal Block: 2 pins, 5 mm
Miscellaneous	Heat sink, screws, solder, etc.

🖨️ Printed Circuit Board (PCB)

To facilitate your assembly, we provide the files of the Printed Circuit Board (PCB) specifically designed for this equalizer. The PCB was carefully planned to minimize interference and ensure maximum signal quality.

Fig. 4 – PCB HI-FI 32W Sound Amplifier with TDA2050

The files are available in GERBER, PDF, and PNG formats, covering all your needs, whether for home assembly or for sending to professional manufacturing. The PCB layout follows the best practices of audio circuit design, with properly sized traces and strategic component placement.

📥 Direct Download Link

To download the necessary files to assemble the electronic circuit, simply click on the direct link provided below:

Download PCB Files (GERBER, PDF, PNG)

🤔 Frequently Asked Questions (FAQ)

To ensure your project is a success, we’ve compiled some of the most common questions about this amplifier. Check them out!

What is the best power supply for this amplifier? 🔽

For optimal performance, a symmetrical power supply of ±18V to ±22V with a capacity of at least 2A is recommended. A well-filtered and stabilized supply will ensure less noise and better sound quality. You can use transformers with double secondary (12V+12V or 15V+15V) followed by a bridge rectifier and appropriate filter capacitors.

Can I use this amplifier with 4-ohm speakers? 🔽

Yes, the TDA2050 can operate with 4-ohm speakers, but this will require a larger heat sink as the IC will heat up more. With 4 ohms, you’ll get more power (up to 35W), but also higher current consumption and heat. Make sure your power supply can provide sufficient current and that the heat sink is adequate for this configuration.

How to assemble a complete stereo system with this circuit? 🔽

To create a stereo system, you’ll need to assemble two identical circuits – one for the left channel and one for the right. Both can be powered by the same symmetrical supply, as long as it has sufficient capacity (at least 4A). You can use a dual stereo potentiometer to control the volume of both channels simultaneously, or two individual potentiometers for separate control.

What is the ideal size of the heat sink for the TDA2050? 🔽

For operation with 8 ohms, a heat sink with thermal resistance of approximately 4°C/W is sufficient. If you plan to use 4 ohms or operate at high volumes for long periods, a larger heat sink with thermal resistance of 2°C/W or lower is recommended. Remember to use thermal paste between the IC and the heat sink to ensure efficient heat transfer.

🎓 Conclusion: Your Next Step in the High-Quality Audio Journey

The TDA2050 amplifier represents the perfect balance between simplicity, cost, and performance. With this project, you’ll have an audio system capable of reproducing music with the clarity and fidelity that audiophiles demand, without the complexity and cost of more elaborate systems.

If you’ve already assembled this amplifier, share your experience in the comments below! We’d love to see photos of your project and hear your impressions about the sound quality. And if you still have questions, don’t hesitate to ask, our community is here to help!

Ready to elevate your audio experience? Download the PCB files, gather your components, and start assembling your 32W Hi-Fi amplifier today. The amazing sound you’ll get will be the reward for your work!

✨ Our Gratitude and Next Steps

We sincerely hope this guide has been useful and enriching for your projects! Thank you for dedicating your time to this content.

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The ElCircuits Team ⚡