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LM4918LQ
Stereo Audio Amp with AGC Control
LM4918
Stereo Audio Amp with AGC Control
General DescriptionThe LM4918isa monolithic integrated circuit that providesa
automatic gain control (AGC), and stereo bridged audio
power amplifiers capableof producing 1W into8Ω with less
than 1.0% THD.
Boomer® audio integrated circuits were designed specifically provide high quality audio while requiringa minimum
amountof external components. The LM4918 incorporatesa
AGC and stereo bridged audio power amplifiers makingit
optimally suitedfor multimedia monitors, portable radios,
desktop and portable computer applications.
The LM4918 featuresan externally controlled, low-power
consumption shutdown mode, anda power amplifier mute
for maximum system flexibility and performance.
Key Specifications THD+Nat 1kHz, 1W,8Ω 0.3% (typ) Total quiescent power supply current 18mA (typ) Total shutdown power supply current 1µA (typ)
Features 0.75dB per step/32step AGC Control Interface Automatic Gain Control Circuitry Stereo Bridged power amplifiers “Click and pop” suppression circuitry Thermal shutdown protection circuitry Selectable Auto Detect Std-by mode and Logic control
Applications Portable Computers Desktop Computers Multimedia monitors
Typical ApplicationFIGURE1. Typical Audio Amplifier Application Circuit
February 2004
LM4918
Stereo
Audio
Amp
with
AGC
Control
