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LM4731TA Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4731TA Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 16 page  LM4731 Stereo 25W Audio Power Amplifier with Mute and Standby Modes General Description The LM4731 is a stereo audio amplifier capable of delivering typically 25W per channel of continuous average output power into a 4 Ω 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 LM4731 has short circuit protection and a thermal shut down feature that is activated when the die temperature exceeds 150˚C. The LM4731 also has a under voltage lock out feature for click and pop free power off and on. The LM4731 has a wide operating supply range from +/-10V - +/-28V allowing for lower cost unregulated power supplies to be used. Key Specifications j Output Power into 4 Ω or 8Ω, 10% THD+N 25W (typ) j THD+N at 1kHz with2x1W into 8 Ω 0.02% (typ) j Mute Attenuation 85dB (typ) j PSRR with fRIPPLE = 120Hz, V RIPPLE =1VRMS 50dB (typ) j Slew Rate 18V/µs (typ) j Standby Current (+/-22V) 4.8mA (typ) Features n Minimal amount of external components necessary n Quiet fade-in/out mute mode n Low current Standby-mode Applications n Audio amplifier for high-end stereo TVs n Audio amplifier for component stereo n Audio amplifier for compact stereo n Audio amplifier for PC satellite speaker systems n Audio amplifier for self powered speakers Connection Diagrams Plastic Package TO-220 Top Marking (Note 12) 20060352 Top View Non-Isolated Package Order Number LM4731TA See NS Package Number TA15A 20060375 Top View U - Wafer Fab Code Z - Assembly Plant Code XY - Date Code TT - Die Traceability LM4731TA - LM4731TA July 2003 © 2003 National Semiconductor Corporation DS200603 www.national.com |
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