As shown for the LM4819 audio power amplifier. An audio signal input through Ci, Ri coupling applied to the amplifier inverting input terminal (4 feet), and the amplifier inverting input terminal (pin 3)
is AC ground, the amplified signal from the output of 5,8 feet. 5,8 feet of indirect load, such as a speaker, thereby constituting the inverter power amplifier circuit. To avoid shutdown current, Shutdown feet (1 foot) should be connected to VDD (OFF state) or ground (full power state), Shutdown feet do not suspended).