A car stereo amplifier using TDA2040 circuit shown here. TDA2040 is a monolithic integrated audio amplifier operating in Class AB mode. The IC has built in short circuit protection circuits and thermal very close and more about it can be operated from a single source. The amplifier can deliver 12 watts into a 8 ohm speaker.
In the circuit of the IC is connected to operate from the 12V line cars. Capacitor C7 is a DC-decoupling capacitor and R4 provides. Network consisting of resistor R5 and capacitor C5 provides high frequency stability and avoids any possibility of oscillation. C6 capacitor couples the output circuits to the speaker. C2 and C1 are the filters of the power supply.
