20W Rangkaian Audio Amplifier TDA7240

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 :

20Watt-Amplifier-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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