This article shows you how to build a 35 watt amplifier circuit that is extra powerful.
It uses a special chip called a TDA2030 in a unique way to basically double the amps output.
This makes the speaker sound much louder.
Building circuits with high voltage can be dangerous.
do this with adult supervision and a qualified electrician should install it in your home.
This project is not meant for beginners.
Circuit Working:
Parts List:
| Component | Value | Quantity | Notes |
|---|---|---|---|
| Resistors (1/4 watt) | All resistors are 1/4 watt unless specified | ||
| R1, R4, R10, R11 | 2.2Ω | 1 each | |
| R2, R3, R8 | 100k | 1 each | |
| R5, R6 | 3.3kΩ | 1 each | |
| R7, R9 | 1Ω | 1 each | |
| Capacitors | |||
| Ceramic C1 | 1.5nF | 1 | |
| Ceramic C2, C3, C4, C5, C7 | 220nF | 1 each | |
| Electrolytic C6 | 10μF 40V | 1 | |
| Semiconductors | |||
| IC1, IC2 | TDA2030 | 2 | |
| Transistors | |||
| T1 | BD250 | 1 | |
| T2 | BD249 | 1 | |
| T3 | TIP36 | 1 | |
| T4 | TIP35 | 1 | |
| Diodes | |||
| D1 to D4 | 1N4001 | 4 | |
| Fuses | |||
| F1, F2 | 5A | 2 | |
| Speaker | 2Ω to 4Ω | 1 |
Linking two TDA2030 amplifiers through affordable power transistors allows the creation of an amplifier capable of delivering increased power.
Utilizing the component values specified in the schematic results in a total amplifier gain of 32 dB.
When employing TIP transistors the speaker impedance can be reduced from 4 ohms to 2 ohms.
The TDA2030 manufactured by SGS ates, is a comprehensive audio amplifier.
The final amplifier operating in AB class, can produce a maximum of 14W at 4 ohms with a power supply of +-14V.
With a well designed power supply, this audio amplifier has the potential to yield an output of 35W.
Formulas:
Popular for its strong performance and ease of use in audio amplifier circuits, the TDA2030 integrated circuit is a popular choice for audio amplifiers.
Here are some important TDA2030 formula and parameters:
Calculating Output Power:
One may estimate the output power Pout of the TDA2030 by utilizing the following formula:
Pout = (Vpeak × Ipeak) 2/ (8 × RL)
where,
- Vpeak: is the peak output voltage swing
- Ipeak: is the peak output current
- RL: is the load resistance connected to the output.
Power Loss:
The following formula may be used to determine the TDA2030s power dissipation, or Pdiss:
Pdiss = (VCC − VEE) × IQ
Where:
- VCC: is the supply voltage,
- VEE: is the negative supply voltage (if used),
- IQ: is the quiescent current drawn by the IC.
Gain in Voltage:
Usually, the voltage gain Vg A v of the TDA2030 is provided by:
Av = Rf / Ri
where,
- Rf: is the feedback resistor
- Ri: is the input resistor.
Response Frequency:
The TDA2030s frequency response, which is normally in the audio range (20 Hz to 20 kHz), is dependent upon the external components (capacitors and resistors) used in the circuit.
Slew Rate:
The maximum rate of change of the output voltage is indicated by the slew rate, or SR, which is usually stated in the datasheet.
When creating and examining circuits that make use of the TDA2030 audio amplifier IC, certain equations and parameters are crucial.
The particular circuit arrangement and the needs of the application will determine the precise values and computations.
For comprehensive specs and manufacturer provided application notes, always see the datasheet.
How to Build:
Building an amplifier using two TDA2030 chips connected through power transistors involves several processes below mentioned is the process of how to build this circuit.
Schematic Design:
- Obtain a schematic diagram for connecting two TDA2030 chips through power transistors.
- This might be available in datasheets or online resources.
Component Selection:
- Choose the appropriate resistors, capacitors and other components based on the schematic.
- Ensure that the values match the requirements of the circuit.
Circuit Assembly:
- If using a PCB follow the schematic to place and solder the components onto the board.
- If using a breadboard carefully connect the components according to the schematic diagram.
Connect TDA2030 ICs:
- Connect the output of one TDA2030 to the input of the second and vice versa.
- Use appropriate coupling capacitors as needed.
Connect Power Transistors:
- Connect the power transistors TIP31 and TIP32 or others as per the schematic to the TDA2030 outputs.
- Ensure proper heat sinking for the transistors.
Power Supply Connection:
- Connect the power supply to the circuit.
- Make sure the voltage is within the specified range e.g.+-14V.
- Power on the amplifier and use a multimeter to check voltages at critical points.
- Ensure there are no short circuits.
- Connect a speaker to the output and input an audio signal to test the amplifiers performance.
Adjustments:
- If necessary adjust resistor values or other components to achieve the desired gain and performance.
Final Enclosure:
- Once satisfied with the performance you can enclose the circuit in a suitable case.
Conclusion:
To conclude, It is important to note that designing and building such high power audio amplifiers require a good understanding of electronics, safety precautions and possibly the use of simulation tools.
Always refer to reliable sources, datasheets and guidelines when working on amplifier circuits and be cautious when dealing with high power electronics.
Additionally, compliance with safety standards and regulations is essential.
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