Power amplifiers circuits and projects

The TDA2030 amplifier circuit is a monolithic IC intended for use as a low frequency class AB amplifier. TDA2030 provides 14W output power (distorsions = 0.5%) at 14V/4Ω and at ± 14V or 28V is 12W/4Ω or 8W/8Ω. TheTDA2030 provides high output current and has very low harmonic and cross-over distortion which made it one of the most used IC in audio amplifiers designs.
TDA2030 can be connected in several ways to deliver different power ratings and characteristics, so we start with the simplest circuit design. continue reading…

This dumping current amplifier particularity of this assembly consists of the fact that by introducing the four pasive components R2, R3, L and C, all harmful influences originating in the nonlinear behavior of the final stage are removed. It has 1 IC (741 or LF357), and 6 transistors, the final stage in equiped with TIP142 and TIP147 transistors. continue reading…

2N3055 is a silicon power transistor used mostly in amplifier and power supply circuits but it is designed for general–purpose switching and amplifier applications. 2N3055 transistor is packed in a TO-3 can, the maximum power rating is 115W, voltage 60V and 15 amp max with a beta gain of 20 to 70 at a collector current of 4A. continue reading…