A simple low-power car stereo amplifier circuit based on TDA 2003 is shown here. The circuit uses inexpensive components, readily available and easy to build. TDA2003 is an amplifier of the car radio Integrated ST Micro electronics has a lot of good features like short circuit protection for all pins, thermal in the range of low harmonic distortion, cross low over the distortion.
In the circuit here every TDA2003 connected as a mono amplifier operating from a 12V supply. Resistors R2 and R3 form a feedback network that adjusts the gain of amplifiers. C7 is the DC input coupling capacitor C5 couples the speaker to the output amplifiers. C4 is used to improve the rejection wave, while C1 and C2 are used for filtering the power supply. C3 and R1 are used to set the upper cutoff frequency. Network consisting of C6 and R4 is used for frequency stabilization and to prevent oscillation
In the circuit here every TDA2003 connected as a mono amplifier operating from a 12V supply. Resistors R2 and R3 form a feedback network that adjusts the gain of amplifiers. C7 is the DC input coupling capacitor C5 couples the speaker to the output amplifiers. C4 is used to improve the rejection wave, while C1 and C2 are used for filtering the power supply. C3 and R1 are used to set the upper cutoff frequency. Network consisting of C6 and R4 is used for frequency stabilization and to prevent oscillation
