Simple Mini Audio Amplifier Circuit using IC TDA7052

In the field of electronics, developing a small effective audio amplifier may significantly improve music quality for a variety of uses.

To do that, the TDA7052 integrated circuit IC is used in the Simple Mini Audio Amplifier Circuit that is shown in the below diagram.

Requiring few parts and simple construction, it provides an affordable way to enhance audio quality for smaller scale endeavors.

This design is perfect for DIY and hobbyists since it is simple and effective.

Circuit Working:

Parts List:

This low power, low distortion audio amplifier is meant for compact audio applications which is the brain behind the amplifier circuit IC TDA7052.

Because of its integrated functionality, it is simple to operate and fits into a small design.

The input sources audio signal is amplified using the TDA7052 IC.

Sound signals are sent into the amplifier via the audio input, which has a single source.

Various gadgets, such as an audio player or smartphone can provide this input.

The circuit may be used in a variety of configurations since it runs on a 6V power source, which can be supplied by batteries or a regulated power converter.

Control gain and volume of the amplifier by simply adjusting the level of the audio input signal using the potentiometer VR1 4.7k.

The input signals level may be changed via the potentiometer VR1, and the IC amplifies it from there.

Because they filter noise and preserve signal integrity, capacitors C1 and C2 are essential to the amplifiers smooth operation.

The 8Ω speaker receives the amplified signal after which sound is produced.

Formulas:

You may use a number of formulas to comprehend and efficiently create the TDA7052 IC based basic mini audio amplifier circuit.

The following important formulas and their uses are listed:

Calculating Power:

You may use the formula for power in a resistive load to get the amplifiers power output:

P = V_out²​​ / R_load​

where,

• P is the power output in watts
• Vout is the output voltage in volts
• Rload is the load resistance in ohms

For an 8Ω speaker:

P = V_out²​​ / 8

Calculating Voltage Gain:

Voltage gain is fixed in the TDA7052 IC.

If the gain of ordinary amplifier circuits could be adjusted, you might apply the following formula:

Gain = V_out​​ / V_in​

where,

• Vout​ is the output voltage
• Vin is the Input voltage

If you are using a fixed gain integrated circuit IC, this calculation might not apply directly since internal design settings often fix the gain of the TDA7052.

Calculating Capacitors:

Capacitor for coupling C2-100nF:

In audio circuits, capacitors usually enable AC signals audio to go through while blocking DC components.

The frequency response may be impacted by the capacitors value.

The cutoff frequency Fc, of a high pass filter made out of the load resistance and coupling capacitor is determined by:

f_c​ = 1​ / 2πR_load​C

where,

• fc​ is the Cutoff frequency in Hz
• Rload is the load resistance in ohms
• C is the capacitance in farads

Capacitor for Filters C1 – 220µF:

This capacitor reduces noise and stabilizes the power source.

One may estimate the ripple voltage Vr by using:

V_r ​= I_load​​ / f × C

where,

• Vr​ is the ripple voltage in volts
• Iload is the load current in amps
• f is the frequency of the ripple in Hz
• C is the capacitance in farads

The performance and design characteristics of the audio amplifier circuit may be better understood with the help of these formulas.

While the power output of the TDA7052 IC is dependent on the output voltage and speaker resistance, you must first make sure that the appropriate values of capacitors are used for filtering and coupling.

How to Build:

To build a Simple Mini Audio Amplifier Circuit using IC TDA7052, follow the below mentioned connections steps:

• Assemble all the required circuits parts as shown in above circuit diagram
• Connect pin 1 of IC1 TDA7052 to +6V output power supply.
• Connect pin 2 of IC1 TDA7052 to center leg of VR1 pot, connect the first leg of VR1 to audio input, and third leg of VR1 to ground.
• Connect pin 3 and pin 6 of IC1 TDA7052 to ground.
• Connect pin 5 of IC1 TDA7052 to one end of 8 ohm speaker.
• Connect pin 8 to other end of 8 ohm speaker.
• Connect capacitors C1 and C2 from pin 1 of +6V output power supply to ground.

Notes:

There are several uses for this simple mini audio amplifier circuit, including:

• Homemade audio projects are ideal for improving the audio quality of gadgets built at home.
• Portable speakers are perfect for creating compact speaker systems that run on batteries.
• For educational purposes it is an excellent illustration of circuits and audio amplification.

Conclusion:

This design offers a simple method for constructing an effective mini audio amplifier that makes use of the TDA7052 integrated circuit.

Requiring few parts and simple construction, it provides an affordable way to enhance audio quality for smaller scale activites.

References:

TDA7052 output DC offset