TDA7293 100W RMS AMPLIFIER SCHEMATIC CIRCUIT DIAGRAM
The TDA7293 is a monolithic integrated circuit in a Multiwatt15 package, intended for use as a high-quality audio class AB amplifier in Hi-Fi applications. It’s designed to deliver up to 100 watts of power into an 8-ohm load at a very low distortion level. Here’s a breakdown of what a TDA7293 100W RMS amplifier typically involves:
TDA7293 100W RMS Amplifier:
TDA7293 IC:
- Type: The TDA7293 is a class AB audio amplifier.
- Power Output: It is capable of delivering up to 100 watts of RMS power into an 8-ohm speaker load. The actual power output can vary based on the specific circuit design and power supply voltage.
- Distortion: It offers low distortion and high fidelity audio amplification.
- Protection: The TDA7293 usually incorporates several protection features like thermal shutdown and short circuit protection to prevent damage to the IC under adverse conditions.
Circuit Design:
- Power Supply: The amplifier requires a dual power supply, typically ±25V DC. This means it needs a positive voltage of +25V and a negative voltage of -25V for its operation.
- Input Stage: The TDA7293 is usually preceded by an input stage that conditions the audio signal before it enters the amplifier. This could include components like capacitors and resistors for impedance matching.
- Feedback Network: The amplifier includes a feedback network to stabilize the gain and improve the linearity of the output signal. This network is crucial for maintaining the fidelity of the amplified audio.
- Output Stage: The TDA7293 has a built-in output stage that can handle the high current required to drive speakers. This output stage is protected against overcurrent and short circuits.
- Heat Sink: Given that the TDA7293 can generate significant heat, a proper heat sink is often attached to the IC to dissipate heat and keep the amplifier operating within a safe temperature range.
Features:
- High Efficiency: Class AB amplifiers like the TDA7293 are more efficient than Class A amplifiers, making them suitable for higher power applications.
- Low Distortion: The TDA7293 is designed to produce very low distortion, ensuring high-quality audio output.
- Versatility: It can be used in various audio applications ranging from home stereo systems to professional audio equipment.
- Reliability: Integrated circuits like the TDA7293 are reliable and provide consistent performance when used within their specified operating conditions.
When designing a TDA7293 100W RMS amplifier, it’s crucial to follow the manufacturer’s datasheet and application notes to ensure proper operation and reliability. The circuit should be properly assembled on a PCB (Printed Circuit Board), and the power supply, feedback network, and other components should be chosen carefully to meet the amplifier’s requirements and specifications.
Despite the TDA7293 small size, performance is very high amplifier integrated manufacturers ( ST Microelectronics ) “120volt 100watt DMOs audio amplifier with mute st-by,” says symmetric + -60v able to work with a total of 120 volts DC TDA7293 datasheet highest working voltj proposed by the Information + -50v The lowest operating voltage at the time of the 60v input when there was no audio signal + -12v. There is a diagram, pcb drawing and a list of materials.
Previously the TDA7293 100w DMOS audio amplifier integrated with the amplifier circuits were shared this circuit is considered the same with others, but the TDA7293 PCB design is very small and regular. In the circuit of the TDA7293 100W amplifier circuit, the DC diaphragm capacitors must be added in addition to the bridge diode.
TDA7293 PCB;
A list of materials;
Code | Material |
Piece.
|
C1 | 470 nf multi |
one
|
C2 | 470 nf mkt |
one
|
C3, C10 | 22 uf 63v |
2nd
|
C4, C5 | 10 uf 63v |
2nd
|
C6, C7, C11 | 100nf multi |
3
|
C8, C9 | 1000 uf 63v |
2nd
|
DA1 | TDA7293 |
one
|
L1 | 5 mh |
one
|
R1 | 1k |
one
|
R2 | 10k |
one
|
R3 | 30k |
one
|
R4, R5, R9 … R12 | 22 k |
6
|
R6 | 20k |
one
|
R7 | 680 ohms |
one
|
R8, R14 | 4.7 ohms |
2nd
|
R13 | 270 ohms |
one
|
VD1 | 1N4148 |
one
|