Saturday, August 6, 2011

TDA1521 - 12W Stereo Amplifier Circuit

TDA1521 - 12W Stereo Amplifier Circuit diagram

This is the circuit diagram of 12W stereo audio power amplifier. The amplifier powered by a single power chip TDA1521. The TDA1521 contains two amplifier module. The TDA1521 has two input channel and two output channel, so, you'll only need a TDA1521 for a stereo amplifier circuit.

Source: 12W stereo amplifier

About Audio Amplifier
An audio amplifier is an electronic amplifier that amplifies low-power audio signals (signals composed primarily of frequencies between 20 - 20 000 Hz, the human range of hearing) to a level suitable for driving loudspeakers and is the final stage in a typical audio playback chain.

The preceding stages in such a chain are low power audio amplifiers which perform tasks like pre-amplification, equalization, tone control, mixing/effects, or audio sources like record players, CD players, and cassette players. Most audio amplifiers require these low-level inputs to adhere to line levels.

While the input signal to an audio amplifier may measure only a few hundred microwatts, its output may be tens, hundreds, or thousands of watts. More explanation about power audio amplifier can be found at

This is a video tutorial about how to a very simple audio amplifier based on the LM386 amplifier chip. It can be built for less than $20 (or might be less than $8 in some countries) and used to amplify any low level audio signal including a guitar, bass or mp3 player.

Watch the video:

No comments: