TDA2822 simple integrated circuit

The integrated circuit TDA2822M is an 8-pin dual in-line package. If the TDA2822 is not available, the TDA2822 package is identical to the TDA2822M. The difference is that the TDA2822M can operate from 3V to 15V, while the TDA2822 has a maximum operating voltage of only 8V. The TDA2822 must be used to reduce the voltage below 8V. The numerical value of R1 is not limited, and a 10k carbon film resistor is generally used. C1 can use 0.1uF polyester capacitor, C2 is 100uF/16V electrolytic capacitor.
Note when using: Since the amplifier is directly coupled, the input signal cannot have a DC component. If the input signal has a DC component, it must be connected in series with a capacitor of 4.7-10uF at the input end, otherwise a large DC current will flow through the speaker to cause it to burn out. In practice, if the above figure is further modified, the effect is more ideal.