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LM4753 Datasheet

  • LM4753

  • Dual 10W Audio Power Amplifier w/Mute, Standby and Volume Co...

  • 13頁

  • NSC

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LM4753 Dual 10W Audio Power Amplifier w/Mute, Standby and Volume Control
June 1999
LM4753
Dual 10W Audio Power Amplifier w/Mute, Standby and
Volume Control
General Description
The LM4753 is a stereo audio amplifier capable of delivering
10W/channel at 10% distortion into a 8鈩?load. The power
amp has an internally set gain of 30 dB. A 0V鈥?V DC con-
trolled volume block provides 80 dB of attenuation from input
to line-out. Line outputs are available after the volume con-
trol for signal routing.
The amplifier has a smooth transition fade-in/out mute and a
power conserving standby function which are controlled
through TTL or CMOS logic. Both functions provide over
75 dB of attenuation.
The LM4753 maintains an excellent Signal-to-Noise ratio of
greater than 70 dB with a low noise floor less than 2 mV. The
IC also maintains above 50 dB of channel separation.
The LM4753 is available in a 15-lead non-isolated plastic
package and is designed for use in TV applications requiring
single supply operation.
Key Specifications
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Output power into 8鈩?at 10% THD 10W
Maximum operating voltage 28V
Power output stage Noise floor 2 mV
Line output Noise floor 55 碌V
0V鈥?V DC controlled volume attenuation 80 dB
Mute attenuation 75 dB
Standby-mode supply current 7 mA
Features
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Quiet fade-in/out mute function
Stereo variable line-out pins
AC output short circuit protection
Thermal shutdown protection
Applications
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Stereo TVs
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Component stereo
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Compact stereo
Typical Application
DS100043-1
FIGURE 1. Typical Audio Amplifier Application Circuit
漏 1999 National Semiconductor Corporation
DS100043
www.national.com

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