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The STA540 is a 4-channel audio power amplifier from STMicroelectronics. It is housed in a 15-pin ZIP package and is designed to deliver up to 4 x 15W of continuous RMS power into 4 ohm speakers. It features low distortion, low noise, and high efficiency, and is suitable for use in car audio systems, portable audio systems, and other audio applications. Features: rn 4 x 15W continuous RMS power into 4 ohm speakers rn Low distortion and low noise rn High efficiency rn Short-circuit and thermal protection rn Low external component count rn High output current capability rn Low quiescent current rn Standby mode Applications: rn Car audio systems rn Portable audio systems rn Home audio systems rn Professional audio systems rn Other audio applications (For reference only)