About The Circuit
A simple circuit diagram using the TDA 2003 IC is illustrated below. This circuit can be used to make a 10 Watt audio amplifier, and be delivered to a 4 Ohms load at a suplly voltae of 18 Volts. This circuit can also be used for making audio systems in cars by making the circuit be operated in 12 Volts.
For more information about the circuit diagram check out the datasheet of TDA 2003 IC. This IC should be carefully used and must be fitted along with a heat sink for protection. The IC has been designed to provide features like low harmonic distortion, low cross over distortion and also short circuit protection between all pins.
A PCB assembling for this circuit is necessary. A minimum Of 18 volt DC should be used to provide power for this circuit. Amplifier gain is provided by the resistors R2 and R3 whereas C3 and R1 are used to determine the upper cut off frequency. At high frequencies the stability is increased with the help of C6 and R4. Also note down that the input ground and output ground are decoupled. The capacitor C5 is used to couple the output to the speaker.