4×50W High Power Amplifier using TDA7563A IC + PCB

PCB 4 x 50W High Power Amplifier, 14.4V – IC TDA7563A

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Hello, electronics enthusiasts! This is a 200W High Power Amplifier Circuit, and its great trump card is that it works with a simple power source and still at 14.4V, which means we can plug in a 12V car battery, or motorbike battery, or UPS battery, etc.

Also, the circuit is very easy to build as it requires very few external components.

The TDA7563A is a quad-bridge type amplifier of BCD technology in Flexiwatt27 and Power SO36 packages designed specifically for car radio applications.

💡 Features

Thanks to the DMOS output stage, the TDA7563A has very low distortion, which allows for clear and powerful sound.

⚙️ Features

Power Specifications

4 x 28W / 4Ω @ 14.4V, 1kHz, 10%
4 x 24W / 4Ω @ 13.2V, 1kHz, 10%
Maximum output power 4x72W / 2Ω

Audio Quality

Low distortion for crystal clear sound
Low output noise for clean audio reproduction
Internal fixed gain (26dB) for consistent performance

🔧 Special Features

Stand-by function – Power saving when not in use
Mute function – Instant silence when needed
Auto-mute function – Protects against low voltage damage
Minimal external components – Simplifies your build
No external compensation required – Plug and play simplicity
No bootstrap capacitors needed – Reduces component count

🎯 Perfect Applications

Based on the TDA7563A IC, this amplifier is incredibly versatile. While it’s designed for car audio systems, it’s also ideal for:

🎚️ Home Studio

Perfect for monitoring systems with clear, powerful sound reproduction

🖥️ Computer Audio

Enhances quadraphonic sound cards like SoundBlaster Live! for immersive gaming

🔊 Active Speakers

Build your own powered speakers with this compact amplifier module

🎬 Home Theater

Create a powerful surround sound system for your movie nights

Each channel of the TDA7563A provides 45W RMS with a sufficient power of 14.4 volts, at a load of 4 ohms and a distortion factor of about 10%. This means you get impressive volume with minimal distortion, perfect for both music and movie audio.

🔌 Amplifier Circuit Diagram

The amplifier schematic shown in Figure 2 is a simple design with few external components, making it an easy amplifier to build even for beginners. Let’s break down the key components and their functions:

Schematic Diagram 4 x 50W High Power Amplifier, 14.4V - IC TDA7563A - elcircuits

Fig. 2 – Schematic Diagram 4 x 50W High Power Amplifier, 14.4V – IC TDA7563A

📝 Circuit Analysis

The beauty of this design lies in its simplicity. The TDA7563A IC handles most of the heavy lifting, requiring only a handful of external components to create a fully functional 4-channel amplifier. The input capacitors (C1, C2) block DC while allowing audio signals to pass, while the various capacitors throughout the circuit ensure stable operation and filtering of unwanted noise.

🧾 Complete Bill of Materials

Component	Specification	Quantity
IC 1	Integrated Circuit TDA7563A	1
C1, C2, C3, C4	220nF Ceramic / Polyester Capacitors	4
C5	Electrolytic Capacitor 10uF / 63v	1
C6, C7, C8	Electrolytic Capacitor 100nF	3
P1	KF301 solderable 2-Pin Bolt-On Connector	1
Others	PCB, tin, wires, etc.	–

⚡ Power Supply Requirements

This amplifier is powered by a single positive and negative voltage power supply and has a supply voltage range that varies with a minimum voltage of 8V and a maximum voltage of 18V.

⚠️ Important Power Considerations

Since this amplifier operates at low voltage, the consumption is quite high. According to Ohm’s law, we can calculate this current as follows, using the formula:

Power Calculation

P = V * I

Where:

P = power (Watts)
V = voltage (Volts)
I = current (Amperes)

Therefore:

I = P / V
I = 200/14.4
I = 12.5 A

🔥 Heat Management

Due to the high current consumption indicated in the above formula, the connections to ground and to the power supply must be made with extreme care. In car radios, the heat sink is small, but it is in contact with the radio housing, which is made of metal, which greatly facilitates heat dissipation.

For home amplifiers, which are usually in constant use, a good heat sink should be used. “It depends on how you are going to use it,” you say, putting a cooler on the heatsink like the ones used in ATX computers.

🖨️ Printed Circuit Board (PCB): Design and Files

We provide the files with the PCB, the schematic, the PDF, GERBER and JPG, PNG and provide a direct link for free download and a direct link, “MEGA“.

📥 Files to download, Direct Link:

Click on the direct link to download the files: Layout PCB, PDF, GERBER, JPG

🔧 Assembly Tips and Tricks

🔌 Connection Quality

Ensure all power connections are secure and use appropriate wire gauge to handle the 12.5A current draw.

🌡️ Heat Management

Use thermal paste between the IC and heatsink for optimal heat transfer, especially for continuous use.

🔧 Component Placement

Keep input and output wiring separate to minimize noise and potential oscillation issues.

🔍 Testing

Test with a variable power supply first, starting at low voltage and gradually increasing to the recommended 14.4V.

🎚️ Performance Optimization

To get the most out of your TDA7563A amplifier, consider these optimization tips:

Power Supply Quality: Use a regulated power supply with minimal ripple for best audio quality.
Speaker Matching: Use 4Ω speakers for optimal power output and efficiency.
Input Signal: Ensure your input signal is within the recommended range to prevent clipping.
Grounding: Implement a star grounding scheme to minimize ground loops and noise.
Cable Quality: Use appropriate gauge cables for power connections to minimize voltage drop.

❓ Frequently Asked Questions

Find answers to common questions about this amplifier circuit below.

Can I use this amplifier with 4Ω speakers? 🔽

We don’t recommend it. This Bridge configuration was designed to work with a minimum impedance of 8Ω. Using 4Ω speakers can overload the ICs, causing overheating and possible permanent damage.

Is it necessary to use heat sinks on the TDA7294 ICs? 🔽

Yes, absolutely! The TDA7294 ICs dissipate significant heat during operation, especially at high powers. We recommend using adequate heat sinks for each IC, with sufficient area to keep the temperature below 80°C.

Can I convert this amplifier into a stereo system? 🔽

To create a stereo system, you would need to build two circuits identical to this one, one for each channel. Alternatively, you could configure each TDA7294 individually (instead of in bridge) to create two lower power channels.

What is the expected sound quality of this amplifier? 🔽

The TDA7294 is known for its excellent sound quality, with low harmonic distortion (typically less than 0.1%) and low noise. You can expect a clean and detailed sound, suitable for high-fidelity audio applications.

Is this amplifier suitable for guitars or musical instruments? 🔽

Yes, this amplifier works very well for guitars and other musical instruments. Its high power and low distortion provide a clean and dynamic sound. For guitar applications, you may want to add a preamplifier circuit or effects before this power stage.

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✨ Our Gratitude and Next Steps

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The ElCircuits Team ⚡