Dual-channel low-power amplifier circuit composed of TDA2822

TDA2822 is a low-power integrated amplifier with the following features: low operating voltage, it can still work normally when it is lower than 1.8V, high integration, few peripheral components, and good sound quality. TDA2822 is widely used in low-power amplifier circuits such as radios, walkmans, and headphone amplifiers.

The figure above shows a typical application circuit of TDA2822 for stereo power amplifier. In the figure, R1, R2 are input bias resistors, C1, C2 are grounding capacitors at the negative feedback end, C6, C7 are output coupling capacitors, R3, C4 and R4, C5 are high-order harmonic suppression circuits to prevent circuit oscillation. The figure below shows the application circuit of TDA2822 for stereo headphones.