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Simple 100 Watt Amplifier Circuit using IC LM12

This article shows how to design a basic 100 watt amplifier circuit using an IC LM12.

No expensive wiring or a large number of components are required.

Soon a few simple steps will lead to a world of superb and deep sound.

The 100 watt amplifier circuits compact size and efficient construction make it perfect for a wide range of applications.

An excellent 100 watt output is generated by enhancing audio signals using the LM12 IC design.

Circuit Working:

Parts List:

ComponentQuantity
Resistors
3.3k 1/4 watt1
2.2k 1/4 watt1
1k 1/4 watt2
Capacitors
Ceramic 2.7nF1
Ceramic 100nF2
Electrolytic 4700μF 100V6
Semiconductors
Diodes 6A22
Diodes 6A44
IC LM121
Transformer 24V-0-24V 5 Amp1
Inductor L1 4μF1
Speaker1

Using the LM12CLK integrated circuit for processing the Simple 100 Watt Amplifier Circuit with a Single IC is a simple and efficient design.

The IC has a strong output stage that can supply up to 150W of power at low impedances of as little as 2 ohms.

However, the circuit is designed to work with 4 ohm speakers for stability and safety providing an RMS power of 100W.

The transformer must produce 24 volts plus 24 volts of AC with a minimum current of 5 amps for mono or 10 amps for stereo in order to power the circuit.

It is advised to use a metal rectifier bridge unit with a heat sink rather than a bridge rectifier unit with four diodes.

14 turns are wound to create the output coil L.

18 wires without cores and 1 inch in diameter.

Performance is not impacted by the coils turn distance.

The circuit operates at its best when an exact resistor with a value of 1k and an output resistance rated for at least 2W of power are used.

It is required that the electrolytic capacitors have a 50V or 63V rating.

All of these elements work together to produce a strong and excellent audio experience.

With this project which has a small and effective circuit and which produces powerful excellent sound takes the sound system to the next level.

Simple to assemble enjoy the amazing sound quality.

The next stage is to use a single integrated circuit to build a custom 100 Watt amplifier circuit.

Formula:

The following formula represents a particular kind of amplifier circuit where voltage gain (Av) is expressed as follows:

Av = 1 + R3 / R2

where,

Understanding the formula for the non-inverting op amp:

The desired voltage gain in a non-inverting op-amp configuration having better op-amp features which is as follows:

Av = 1 + R3 / R2

The formula indicates that the voltage gain is calculated by the ratio of the feedback resistor R3 to the gain resistor R2.

A higher R3 / R2 ratio is connected with a greater voltage gain.

Important points to remember:

This formula focuses on non-inverting op amp designs.

There are several formulas for inverting and for different amplifier designs.

The formula assumes a perfect operational amplifier with unlimited gain and limitless input impedance.

In actual circuits several factors can affect the actual gain achieved.

By selecting the right values for resistors R2 and R3 one can construct the voltage gain for the amplifier circuit.

How to Build:

For building a Simple 100 Watt Amplifier Circuit using IC LM12 involves several connections and assembling process:

Put first safety:

Source of Power:

Coil Output (L):

Integration of IC LM12:

Connecting the Speaker:

Testing:

Conclusion:

Using the LM12 integrated circuit one can design a 100 watt amplifier circuit that uses very cheap components to produce a powerful audio amplifier.

High quality sound is produced by this circuit making it a great option for music lovers who want to improve their audio environments.

References:

Application Note 446 A 150W IC Op Amp Simplifies Design of Power Circuits

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