This post explains for the semiconductor CD7522CS.
The Part Number is CD7522CS.
The package is SIP 12 Pin Type
The function of this semiconductor is 3W x 2BTL audio power amplifier.
Manufacturers : Wuxi
CD7522CS is a 3W×2 bridge output audio power amplifier circuit, mainly used in TV and audio.
Equipment, personal computer and other systems. Its characteristics are as follows:
1. Wide range of power supply voltage, working normally in the voltage range of 3.5~13.5V
2. With standby function
3. With DC volume control
4. Simple peripheral circuit