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LM4732 Datasheet

  • LM4732

  • Stereo 50W Audio Power Amplifier with Mute

  • 857.42KB

  • 22頁

  • NSC

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LM4732 Stereo 50W Audio Power Amplifier with Mute
July 2003
LM4732
Stereo 50W Audio Power Amplifier with Mute
General Description
The LM4732 is a stereo audio amplifier capable of typically
delivering 50W per channel of continuous average output
power into a 4鈩?or 8鈩?load with less than 10% THD+N from
20Hz - 20kHz.
The LM4732 has short circuit protection and a thermal shut
down feature that is activated when the die temperature
exceeds 150藲C. The LM4732 also has an under voltage lock
out feature for click and pop free power on and off.
Each amplifier of the LM4732 has an independent smooth
transition fade-in/out mute.
The LM4732 has a wide operating supply range from +/-10V
- +/-40V allowing for lower cost unregulated power supplies
to be used.
The LM4732 amplifiers can easily be configured for bridge or
parallel operation for 100W mono solutions.
Key Specifications
j
Output Power/Channel at 10% THD+N,
1kHz into 4鈩?or 8鈩?/div>
j
THD+N at 2 x 1W into 8鈩? 1kHz
j
Mute Attenuation
j
PSRR
j
Slew Rate
50W (typ)
0.01% (typ)
110dB (typ)
89dB (typ)
19V/碌s (typ)
Features
n
Low external component count
n
Quiet fade-in/out mute mode
n
Wide supply range: 20V - 80V
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
20072422
FIGURE 1. Typical Audio Amplifier Application Circuit
漏 2003 National Semiconductor Corporation
DS200724
www.national.com

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