LM4730 Datasheet | National Semiconductor

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 - 20k Hz. 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 1k Hz with 2 X 1W into 8Ω 0.02% (typ) Mute Attenuation 85d B (typ) PSRR with f RIPPLE = 120Hz, VRIPPLE = 1VRMS 50d B (typ) Slew Rate 18V/µs (typ) Standby Current (+/-17V) 3.5m A (typ) Features - Minimal amount of external ponents necessary - Quiet fade-in/out mute mode - Low current Standby-mode Applications - - - - - Audio amplifier for high-end stereo TVs Audio amplifier for ponent stereo Audio amplifier for pact stereo Audio amplifier for PC satellite speaker systems Audio amplifier for self powered speakers Connection Diagrams Plastic Package (Note 12) TO-220 Top Marking (Note 12) Top View Non-Isolated Package Order Number LM4730TA See NS Package Number TA15A Top View U - Wafer Fab Code Z - Assembly Plant Code XY - Date Code TT - Die Traceability LM4730TA - LM4730TA © 2009 National Semiconductor Corporation 200594 Print Date/Time: 2009/10/26 15:41:58 .national. 200594 Version 3 Revision 2 Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit .national. 200594 Version 3 Revision 2 2 Print Date/Time: 2009/10/26 15:41:58 Absolute Maximum Ratings (Note 1, Note 2) If Military/Aerospace specified devices are required,...