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RDA3118E28 is a Class D audio power amplifier IC chip, generally used in LCD TV audio circuit, RDA3118E28 adopts TSSOP-28 package process. RDA3118E28 is directly interchangeable with TPA3110. Digital power decoupling 2 27 Y input 4.6 2 Black peak Holding Capacitor 7.8 28 Y Output 2.7 3 IIC bus serial clock input 3.1 29 B-Y Output 1.7 4 IIC bus serial data input 2.8 30.