Sound circuit: AN5265
Source: InternetPublisher:拿铁三分糖 Updated: 2017/01/16
AN5265 pin functions and reference voltage:
Pin 1: 12V - pre-stage power supply
Pin 2: 5V - audio signal input terminal
Pin 3: 0V - mute control terminal (mute when high level)
Pin 4: 0.1V - volume control voltage input terminal
Pin 5: 7V - filter terminal
Pin 6: 7.4V - negative feedback input terminal
Pin 7: 0V——Ground
Pin 8: 7.5V - power amplifier output
Pin 9: 15V - amplifier level power supply
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