3 Channel 30W Audio Power Amplifier with Mute
LM4733 3 Channel 30W Audio Power Amplifier with Mute
September 2003
LM4733 3 Channel 30W Audio Power Amplifier with Mu...
Description
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...
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