This circuit use TA7222AP to amplifiers audio signal .The price only $0.99 and can provide 5.8 watt with Muting Control.Power supply  can use for 8-12Vdc it is a good idea to use for car audio power amp ,  coin-op machine game, security system etc. link

Fig 1. TA7222AP pin out
  

Fig 2. schematic for 5.8 watt audio power amplifier
Fig 1. TA7222AP pin out
| 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 | 
Fig 2. schematic for 5.8 watt audio power amplifier


 
 
 
 
 
 
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