The TDA2030 2.1 amplifier is a circuit that uses two TDA2030 integrated circuits for the stereo channels (left and right) and one TDA2030 in bridge mode for the subwoofer channel (bass).

The TDA2030 is a class AB audio amplifier that can operate with voltages up to 36V and currents up to 3.5A. It has a good sound quality, low distortion and thermal and short-circuit protection. It can be used in both single and bridge configurations, increasing the output power.

The circuit also uses a NE5532 dual operational amplifier to make the preamplifier and the low-pass filter for the subwoofer channel. The NE5532 is a low-noise and high-speed operational amplifier, widely used in audio applications.

The circuit is powered by a symmetrical source of 12V + 12V, which can be obtained from a transformer with double secondary of 12V and a bridge rectifier with filtering capacitors. The source also uses two voltage regulators LM7812 and LM7912 to provide a stable voltage of 12V for the operational amplifier. This circuit is ideal for those who want to build a 2.1 sound system for their computer, TV or other audio device.

Details

https://xtronic.org/circuit/tda2030-2-1-or-lm1875-2-1-power-amplifier/

Detalhes

https://www.te1.com.br/2023/05/circuito-amplificador-tda2030-lm1875-2-1/