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Author Topic: Make an Experiment about Amplifier  (Read 244 times)

Offline Danmtang

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Make an Experiment about Amplifier
« on: August 25, 2017, 09:35:36 AM »
Good afternoon~
I am a student and I love to make some electronic experiments, Now I am doing a project about car audio amplifier using TDA2040. 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.
The circuit diagram is given below as an attachment.

TDA2040 PDF
As the circuit shows, 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.
I designed it but the output was very poor. It has humming sound and does not have bass at all. Well.it doesn’t produce a clear sound. Please I need someone help before tuesday, it’s a project I would like to submit as my electronic work as soon as possible.
Thanks in advance.