A
car stereo amplifier circuit using TDA2040 is shown here. TDA2040 is a
monolithic integrated audio amplifier that operates in Class AB mode. The IC
has built in circuitry for short circuit protection and thermal shut down and
more over it can be operated from a single supply too. The amplifier can
deliver 12 watts into to a 8 ohm speaker.
In
the circuit the IC is wired in order to operate from the cars 12V line.
Capacitor C7 is the input DC decoupling capacitor and R4 provides feedback.
Network consisting of resistor R5 and capacitor C5 provides high frequency
stability and prevents any chance of oscillation. Capacitor C6 couples the ICs
output to the speaker. C2 and C1 are power supply filters.
Circuit
diagram of car stereo circuit using TDA2040
Car amplifier circuit
diagram
Notes.
- Quality of the PCB is a very crucial factor in the amplifiers performance.
- The amplifier can be operated from cars 12V line.
- Heat sink is necessary for TDA2040.
- All electrolytic capacitors must be rated 15V.
- Only one channel is shown here. For stereo application you must make one more identical copy
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