L4733TA

LM4733 3 Channel 30W Audio Power Amplifier with Mute September 2003 LM4733 3 Channel 30W Audio Power Amplifier with Mute General Description The LM4733 is a three channel audio amplifier capable of typically delivering 30W per channel of continuous average output power into a 4Ω or 8Ω load with less than 10% THD+N from 20Hz - 20kHz. The LM4733 has short circuit protection and a thermal shut down feature that is activated when the die temperature exceeds 150˚C. The LM4733 also has an under voltage lock out feature for click and pop free power on and off. Each amplifier of the LM4733 has an independent smooth transition fade-in/out mute. The LM4733 has a wide operating supply range from ± 10V - ± 32V allowing for lower cost unregulated power supplies to be used. The LM4733 amplifiers can easily be configured for bridge or parallel operation for higher power and bi-amp solutions Key Specifications j Output Power/Channel at 10% THD+N, 1kHz into 4Ω or 8Ω j THD+N at 3 x 1W into 8Ω, 1kHz j Mute Attenuation j PSRR j Slew Rate 30W (typ) 0.03% (typ) 110dB (typ) 85dB (typ) 9V/µs (typ) Features n Low external component count n Quiet fade-in/out mute mode n Wide supply range: 20V - 64V Applications n n n n Audio Audio Audio Audio amplifier amplifier amplifier amplifier for for for for component stereo compact stereo self-powered speakers high-end and HD TVs Typical Application 200794B5 FIGURE 1. Typical Audio Amplifier Application Circuit © 2003 National Semiconductor Corporati...