This is one of the semiconductor types. This part name is YG2025.
This product has 2-channel audio power amplifier functions.
Manufacturers of product is ETC.
Image and pinout :
YG2025 PDF Datasheet
Some of the text files within the PDF file :
YG2025 is IC for Two-channel audio power amplifier circuit.
The circuit features are as follows
The operating supply voltage range is 312V
The output power is determined by the use of supply voltage and load
P = 0.1W2VCC = 3VRL = 4Ω
P = 1W2VCC = 6VRL = 2Ω
P = 2.3 W2VCC = 9VRL = 4?
Applicable to mono bridge type BTL or stereo line two working conditions.
It also has external components less channel separation high burst noise less voltage gain can be adjusted by external resistors and other features
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Please refer to the file for details.