Wednesday, October 26, 2011

15W OTL Power Amplifier based TDA2030

The following diagram is the circuit diagram of 15W OTL power amplifier which is build based single amplifier chip TDA2030 produced by STMicroelectronics. This circuit is very simple, the main active component was the TDA2030 while the others discrete components supposed to support the TDA2030 to work properly.

15W OTL Power Amplifier Schematic Diagram:
15W OTL Power Amplifier based TDA2030

15W OTL Power Amplifier PCB Layout
electronic circuit diagram

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 the video tutorial about how to build a realy simple headphone amplifier. The circuit powered with 9V battery and use an IC to amplify the input signal from mp3 player.
Watch the video:

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