40W Stereo 14.4V Car Audio Amplifier using TDA8560Q IC + PCB

40W Stereo 14.4V Car Audio Power Amplifier using TDA8560Q IC — 14.4V 80W Stereo Automotive Audio Amplifier – TDA8560Q IC

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👋 Hello, electronics and high-quality audio enthusiasts!

Today we’re going to dive into the fascinating world of automotive amplifiers with a project that combines impressive power and simplified assembly. Get ready to build an audio amplifier circuit that delivers 80W of total power (2 × 40W / 2 Ω) with just a few external components!

This amplifier, based on the TDA8560Q IC, is perfect for home audio, car audio, return box or guitar cube applications, due to its 12V power supply with a simple source. But don’t be fooled: its versatility allows use in various projects, from residential sound systems to portable speakers. Best of all? With BTL (Bridge-Tied Load) configuration, you get maximum efficiency and sound quality.

🚀 Why is the TDA8560Q the perfect choice?

The TDA8560Q is not just another amplifier IC – it’s a complete solution in a single component! This Class B output amplifier comes encapsulated in a 13-pin Single-In-Line (SIL) power package, containing two identical amplifiers ready for bridge applications. Each amplifier has a fixed gain of 40 dB, ensuring consistency and sound quality.

✨ Special Features:

✅ Mode selection switch (pin 11) for total control.
✅ Standby mode with extremely low consumption (<100 µA).
✅ Mute function that suppresses the input signal when necessary.
✅ Protection against “plops” on activation (silence on startup).

💡 Teacher’s Tip: With an extremely low input current (<40 µA), you can even use a low-cost power switch to control the device. It’s economy and efficiency in one package!

📐 Circuit schematic diagram

Figure 2 below reveals the secret behind this circuit so powerful and compact. Despite the simplicity, this schematic delivers impressive performance. The beauty of this design lies in its efficiency: maximum power with minimum components!

Fig. 2 – Schematic Diagram of the 80W Stereo 14.4V Automotive Amplifier with TDA8560Q

💡 Versatility: explore the possibilities!

With an operating voltage range between 6V to 18VDC, this amplifier transcends car barriers! Its common and low voltage power supply makes it ideal for:

🔹 Compact home sound systems
🔹 Portable speakers for parties
🔹 Superior quality computer speakers
🔹 Audio systems for boats and campers
🔹 Educational electronics projects

📋 Component List

One of the great advantages of this project is the lean component list. With just a few essential elements, you’ll have a professional amplifier working in no time!

Component	Specification	Notes
U1	TDA8560Q IC	Main Amplifier
R1, R2, R3	10K ohms (1/8 W)	Brown, black, orange
C1, C2	470nF Polyester	Audio input
C3	47uF / 35V Electrolytic	Decoupling
C4	2200uF / 35V Electrolytic	Power filter
C5	100nF Ceramic	High frequency filter
RP1, RP2	20K Potentiometer	Logarithmic (Volume)
Connectors	Terminals and RCA	Input and Output

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🖨️ The Printed Circuit Board (PCB)

To make your life easier, we provide the files of the PCB – Printed Circuit Board. The files are in GERBER, PDF and PNG formats, covering all your needs, whether for home assembly or to send to a professional manufacturing.

And best of all: the files are available for free download directly from the MEGA server, through a direct link, without any complication or redirection!

Fig. 3 – PCB of the 80W Stereo 14.4V Automotive Amplifier with TDA8560Q

📥 Direct Link to Download

To download the necessary files for assembling the electronic circuit, just click on the direct link provided below:

Download Link: PCB Layout, PDF, GERBER, JPG

🛠️ Assembly and adjustment tips

To ensure that your amplifier works perfectly and delivers all the promised power, here are some valuable tips from the lab:

Heat dissipation: The TDA8560Q IC gets hot! Mount it on a good aluminum heat sink to avoid thermal shutdown.
Power supply: Use a source capable of supplying peak currents. For automotive use, an extra 4700µF capacitor at the power input helps with bass.
Grounding: The “GND” must be solid. Poor grounding is the main cause of noise (hum) in amplifiers.
Initial test: Before connecting to expensive speakers, measure the output with a multimeter to ensure there is no DC voltage going to them.

🤔 Frequently Asked Questions (FAQ)

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

What is the real power of this amplifier? 🔽

This amplifier delivers 40W per channel in 2Ω loads, totaling 80W in stereo configuration. In 4Ω loads, the power is approximately 25W per channel. It’s important to note that the actual power may vary depending on the quality of the power supply and components used.

Can I use 4Ω speakers with this amplifier? 🔽

Yes, you can use 4Ω speakers with this amplifier. However, the output power will be lower (approximately 25W per channel instead of 40W). The circuit was optimized for 2Ω, but works perfectly with 4Ω, just with reduced power.

Does this amplifier need a symmetrical power supply? 🔽

No, this amplifier was designed to work with a simple (non-symmetrical) power supply, which makes it ideal for automotive applications that use the vehicle’s battery (12V). The operating voltage can vary between 6V and 18VDC.

Does the TDA8560Q IC need a heat sink? 🔽

Yes, it is highly recommended to use an adequate heat sink for the TDA8560Q IC, especially if you plan to use the amplifier at high volumes or for extended periods. The heat sink helps keep the IC at a safe operating temperature, ensuring greater durability and performance.

Can I replace the TDA8560Q with another IC? 🔽

There are some similar ICs that can be used as replacements, such as the TDA8563Q or TDA8560. However, it’s important to check the pinout and electrical characteristics before making any substitution. Circuit changes may be necessary to accommodate differences between components.

✨ 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 ⚡