Here is an audio amplifier based on the TDA7240 IC from ST Microelectronics. The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications.
Circuit diagram :
20W Rangkaian Audio Amplifier Circuit Diagram
This circuit of audio amplifier based IC TDA7240 can deliver 20 watts of audio output power into a 4ohm load. The IC has minimum external parts count and is available in the 7 pin compact Heptawatt package. The IC also has a lot of good features like loud speaker protection, short circuit protection, low noise, low distortion etc. The circuit can be operated from a 12V DC single power supply and this makes it very useful in car audio application.
Notes :
- Use 4 ohm, 20W speaker.
- S1 is the standby switch and S2 is the ON/OFF switch.
- LED D2 is a power ON indicator.
- give good cooling at TDA7240 IC.
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