Efficient 6 Watt Audio Amplifier Circuit with IC TDA2613

Audio amplifiers are super important in electronic systems because they boost audio signals to power loudspeakers effectively.

The TDA2613 is a Hi-Fi audio amplifier integrated circuit that provides great sound quality while needing very few extra parts.

In this article, we will explain how to design and operate a efficient 6 watt audio amplifier using the IC TDA2613.

This amplifier circuit is perfect for small audio setups and features low distortion a wide range of frequencies and is easy to build.

Circuit Working:

Parts List:

The circuit diagram for the 6 watt audio amplifier that uses the IC TDA2613 is shown above.

This design features the TDA2613 integrated circuit as its main part along with some passive components for coupling, decoupling and feedback.

The audio signal enters through pin 9 of the TDA2613 via a coupling capacitor C4.

This capacitor prevents any DC signals from interfering, allowing only the AC audio signal to be amplified. The TDA2613 boosts the input signal inside the chip and sends the amplified output from pin 6.

To keep the gain stable and enhance the frequency response, a feedback network made up of R1 and C1 is used.

Before reaching the 8Ω speaker, the amplified signal goes through a decoupling capacitor C2 to block any DC components ensuring that only the AC signal is delivered to the speaker.

Additionally, capacitors C5 and C6 help filter and decouple the power supply, which helps maintain stable performance by reducing noise and ripple from the power source.

The TDA2613 chip works well with a voltage between 12V and 24V of direct current.

However, to get the best results it is usually best to use a supply voltage close to 18V which we have used in our circuit diagram.

It is also really important to make sure the power supply is stable and has good filtering.

This helps to avoid any annoying noise or problems that could mess up the sound quality.

Formulas with Calculations:

The formulas for efficient 6 watt audio amplifier that uses the IC TDA2613 is mentioned below:

Output Power Calculation:

Output power (P) = (V²) / (2 × R_load)

Assuming a supply voltage ( Vs) of 18V and load resistance (R_load) of 8Ω:

Peak output voltage = Vs × 0.7 = 12.6V approx. 70% of Vs for practical conditions

RMS voltage = 12.6 / √2 = 8.91V

P = (8.91²) / (2 × 8) = 4.96W approx 5W

With ideal conditions, the TDA2613 can deliver up to 6W.

Coupling Capacitor Calculation:

The value of C2 ensures that the amplifier passes low frequencies without significant attenuation.

Cutoff frequency (f_c) = 1 / (2π × R_load × C2)

Assuming f_c = 20 Hz for good bass response:

C2 = 1 / (2π × 8 × 20) = 995µF

A 680µF capacitor is used here as it provides an acceptable cutoff frequency slightly above 20 Hz.

How to Build:

To build a Efficient 6 Watt Audio Amplifier Circuit with IC TDA2613

• Gather all the components as mentioned in the above circuit diagram.
• Connect pin 3 of IC TDA2613 to GND through capacitor C3, and connect pin 3 to pin 8.
• Connect pin 5 of IC TDA2613 to GND.
• Connect pin 6 of IC TDA2613 to one end of 8Ω speaker through capacitor C2 and other end of speaker to GND, connect from pin 6 capacitor C1 and resistor R1 to GND.
• Connect pin 7 of IC TDA2613 to +18V DC, connect from positive supply capacitor C5 to GND, and connect capacitor C8 to GND.
• Connect pin 9 of IC TDA2613 to audio input through capacitor C4, and connect the other end of audio input to GND.

Conclusion:

The efficient 6 watt audio amplifier circuit that uses the IC TDA2613 is a easy and efficient design perfect for small audio projects.

It has a low number of parts, is easy to put together and delivers great sound quality making it a fantastic option for people who love to build their own audio equipment.

If you pick the right components and follow the circuit diagram, you can create a dependable amplifier that will improve your listening experience.