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LM4918 Datasheet

  • LM4918

  • National Semiconductor [Stereo Audio Amp with AGC Control]

  • NSC

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LM4918 Stereo Audio Amp with AGC Control
February 2004
LM4918
Stereo Audio Amp with AGC Control
General Description
The LM4918 is a monolithic integrated circuit that provides a
automatic gain control (AGC), and stereo bridged audio
power amplifiers capable of producing 1W into 8鈩?with less
than 1.0% THD.
Boomer
廬
audio integrated circuits were designed specifically
to provide high quality audio while requiring a minimum
amount of external components. The LM4918 incorporates a
AGC and stereo bridged audio power amplifiers making it
optimally suited for multimedia monitors, portable radios,
desktop and portable computer applications.
The LM4918 features an externally controlled, low-power
consumption shutdown mode, and a power amplifier mute
for maximum system flexibility and performance.
Key Specifications
j
THD+N at 1kHz, 1W, 8鈩?/div>
j
Total quiescent power supply current
j
Total shutdown power supply current
0.3% (typ)
18mA (typ)
1碌A(chǔ) (typ)
Features
n
n
n
n
n
n
0.75dB per step/32step AGC Control Interface
Automatic Gain Control Circuitry
Stereo Bridged power amplifiers
鈥淐lick and pop鈥?suppression circuitry
Thermal shutdown protection circuitry
Selectable Auto Detect Std-by mode and Logic control
Applications
n
Portable Computers
n
Desktop Computers
n
Multimedia monitors
Typical Application
20091301
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 2004 National Semiconductor Corporation
DS200913
www.national.com

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