LM4730

LM4730 Stereo 14W Audio Power Amplifier with Mute and Standby Modes OBSOLETE LM4730 October 26, 2009 Stereo 14W Audio Power Amplifier with Mute and Standby Modes General Description The LM4730 is a stereo audio amplifier capable of delivering typically 14W per channel of continuous average output power into a 4Ω or 8Ω load with less than 10% THD+N from 20Hz - 20kHz. Each amplifier has an independent smooth transition fade-in/ out mute and a power conserving standby mode which can be controlled by external logic. The LM4730 has short circuit protection and a thermal shut down feature that is activated when the die temperature exceeds 150°C. The LM4730 also has a under voltage lock out feature for click and pop free power off and on. The LM4730 has a wide operating supply range from +/-10V - +/-25V allowing for lower cost unregulated power supplies to be used. Key Specifications ■ ■ ■ ■ ■ ■ Output power into 4Ω or 8Ω, 10% THD+N 14W (typ) THD+N at 1kHz with 2 X 1W into 8Ω 0.02% (typ) Mute Attenuation 85dB (typ) PSRR with fRIPPLE = 120Hz, VRIPPLE = 1VRMS 50dB (typ) Slew Rate 18V/µs (typ) Standby Current (+/-17V) 3.5mA (typ) Features ■ Minimal amount of external components necessary ■ Quiet fade-in/out mute mode ■ Low current Standby-mode Applications ■ ■ ■ ■ ■ Audio amplifier for high-end stereo TVs Audio amplifier for component stereo Audio amplifier for compact stereo Audio amplifier for PC satellite speaker systems Audio amplifier for self powered speakers Connection D...