This TDA 2005 IC was designed specifically in car audio system for power boosting applications. This IC has a protection against short circuit and overheating. In the above circuit use a bridge configuration that will deliver 20W of output power with 2 ohm speakers. This 20 Watt Power Amplifier circuit requires a power supply voltage 14.4 volts .
Parts list : R1 : 120 K R2 : 1K R3, R4 : 1 ohm R5 : 2K R6, R7 : 12 ohm C1, C9 : 2uF C2 : 10uF C3, C8 : 220uF C4, C7 : 100uF C5, C6 : 0.1uF IC : TDA 2005