Here is a 35W Hi-Fi power amplifier circuit using the TDA2050:
The TDA2050 is a popular audio power amplifier IC known for its good performance and reliability.
The circuit typically consists of the following components:
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Power Supply: A stable and clean power supply is crucial. You might use a transformer, rectifier diodes, capacitors for filtering, and voltage regulators to provide the appropriate voltage (usually around ±18V to ±25V) for the amplifier.
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Input Coupling Capacitors: These capacitors (often around 1μF to 10μF) connect the input signal to the amplifier and block any DC component.
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Feedback Components: Resistors and capacitors are used to set the gain and frequency response of the amplifier. The values of these components determine the amplification factor and the audio quality.
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Output Coupling Capacitor: A large capacitor (e.g., 1000μF or more) is used at the output to block any DC component and couple the amplified signal to the load (speaker).
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Protection Components: To protect the TDA2050 from overcurrent, overvoltage, and thermal runaway, you might include fuses, zener diodes, and heat sinks.
The circuit diagram for a basic TDA2050 power amplifier might look something like this:
[Here you could insert a simple circuit diagram image or describe it in detail with component values and connections]
When building this circuit, make sure to use good quality components, proper PCB layout, and adequate heat dissipation for reliable and high-quality audio amplification.