CSC8005 is a Bluetooth IC switching audio power amplifier SOP-8 chip, 1 pin is power down control terminal high level effective, 2 pin is internal common mode voltage bypass capacitor, 3 pin is AB Class D switching pin High power level AB low power level D, pin 4 is the analog input, pin 5 is the analog output, pin 6 is the positive terminal of the power supply, pin 7 is the power supply, pin 8 is the analog output terminal 2.