The TDA2030 15W amplifier circuit design is relatively straightforward. Here is a basic circuit configuration:
You will need a TDA2030 integrated circuit, power supply capacitors (typically 2200uF or larger), input coupling capacitors (around 1uF to 10uF), feedback resistors (to set the gain), and output coupling capacitors (similar to the input coupling capacitors).
The power supply should be symmetrical, usually around ±12V to ±18V. Connect the positive and negative supply voltages to the appropriate pins of the TDA2030.
The input signal is coupled through the input capacitor to the non-inverting input of the TDA2030. The feedback resistors are connected between the output and the inverting input to set the gain of the amplifier.
The output signal is taken from the output pin and passed through the output coupling capacitor to drive the load.
It's important to use proper heat sinks for the TDA2030 to dissipate heat, especially at higher power levels.
Please note that this is a basic description, and for a reliable and high-quality circuit, additional components like decoupling capacitors, protection diodes, and proper grounding might be necessary depending on the specific application requirements.