G1427

Global Mixed-mode Technology Inc. G1427 2W Stereo Audio Amplifier 6dB\10dB\15.6dB\21.6dB Selectable Gain Settings Features Internal Gain Control, Which Eliminates External Gain-Setting Resistors „ Depop Circuitry Integrated „ Output Power at 1% THD+N, VDD=5V --2.0W/CH (typical) into a 4Ω Load --1.2W/CH (typical) into a 8Ω Load „ Bridge-Tied Load (BTL), Single-Ended (SE) „ Stereo Input MUX www.DataSheet4U.com „ PC-Beep Input „ Fully differential Input „ Shutdown Control Available „ Surface-Mount Power Package 24-Pin TSSOP-P „ General Description G1427 is a stereo audio power amplifier in 24pin TSSOP thermal pad package. It can drive 2.0W continuous RMS power into 4Ω load per channel in Bridge-Tied Load (BTL) mode at 5V supply voltage. Its THD is smaller than 1% under the above operation condition. To simplify the audio system design in the notebook application, G1427 supports the Bridge-Tied Load (BTL) mode for driving the speakers, Single-End (SE) mode for driving the headphone. For the low current consumption applications, the SHDN mode is supported to disable G1427 when it is idle. The current consumption can be reduced to 160µA (typically). Amplifier gain is internally configured and controlled by two terminals (GAIN0, GAIN1). BTL gain settings of 6dB, 10dB, 15.6dB, 21.6dB are provided, while SE gain is always configured as 4.1dB (inverting) for headphone driving. G1427 also supports two input paths, that means two different amplitude AC signals can be applied and chos...