12 V AUDIO AMPLIVIER IC TDA7222AP ELECTRONIC DIAGRAM Use 12V DC for powering the circuit. The IC must be heatsinked. Speaker can be a 4 ohms one.For optimum performance input and output must be separately grounded. Pin Name Description 1 Vcc Supply Voltage 2 RR Ripple Reject 3 MC Muting control 4 OP AF Signal Input 5 FB FB Filter 6 GA Gain adjust 7 GND Ground 8 GND Ground 9 OP AF Output 10 BS BootStrap