Amplifiers, as you may know, are primarily used to increase the input voltage or power. Only the input voltage is changed and amplified in voltage amplifiers, whereas the entire power, including voltage and current, is amplified in power amplifiers. There are several types and classifications of power amplifiers. As a result, instead of delving into classes, we’ll focus on one type (power amplifier) e in this post. Audio power amplifiers, radio power amplifiers, and power amplifiers are the three major types. So, in this tutorial, we are going to make a “25 Watt Audio Power Amplifier Circuit” using TDA2040.
TDA2040 is the audio amplifier that works in the class AB amplifier mode. Class AB amplifier belongs to the family of power amplifiers, used to reduce distortions. Practically, it is the combination of the class A and B amplifiers. It has greater power efficiency that provides a pleasant sound. Therefore, in this article, we are making an amplifier using the TDA2040 IC.
Hardware Required
| S.no | Component | Value | Qty |
|---|---|---|---|
| 1. | IC | TDA2040 | 1 |
| 2. | Speaker | 8Ω | 3 |
| 3. | Electrolytic Capacitor | 220uf, 22uf, 1uf | 2, 1, 1 |
| 4. | Ceramic Capacitor | 100nf | 3 |
| 5. | Resistor | 22KΩ, 680Ω, 4.7Ω | 2,1,1 |
| 6. | Battery | 12V | 1 |
| 7. | 2-Pin Connector | – | 2 |
Circuit Diagram
Working Explanation
This 25 Watt Audio Power Amplifier Circuit uses TDA2040 IC. Resistor R3 is wired into the circuit providing feedback between pins 4 and 2. Resistor R4 and capacitor C7 are making the network for high-frequency stability, connected with pin 4. The power supply is applied at pin 5 and pin 3 is used for the ground. Hence, an amplified output is coming from pin 4.
We may get an excellent peak-to-peak audio output signal when we use a dual power supply, which we cannot get when we use a single power supply. However, the overall amplification of both dual and single supply remains the same.
The amplifier takes a single audio signal and outputs a mono audio signal; if a stereo amplifier is required, two TDA2040 amplifiers can be bridged.
Application and Uses
- Radio wave transmitters can also use the circuit.
- We can also use it in hi-fi electronic devices and gadgets.
- We can also use this in military applications such as acoustic weaponry.
- In robotics applications in this modern technological era.
- Also, in-home audio systems.
- It is suitable for usage in electronic instruments such as keyboards and guitars.
- We can also use it in sound systems for different events.
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