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LM4753T
Dual 10W Audio Power Amplifier w/Mute, Standby and Volume Control
LM4753
Dual 10W Audio Power Amplifier w/Mute, Standby and
Volume Control
General DescriptionThe LM4753isa stereo audio amplifier capableof delivering
10W/channelat 10% distortionintoa8Ω load. The power
amphasan internallyset gainof30dB.A 0V–5VDC con-
trolled volumeblockprovides80 dBof attenuationfrom input line-out. Line outputsare available afterthe volume con-
trolfor signal routing.
The amplifierhas asmooth transitionfade-in/out muteanda
power conserving standby function which are controlled
through TTLor CMOS logic. Both functions provide overdBof attenuation.
The LM4753 maintainsan excellent Signal-to-Noise ratioof
greaterthan70dBwith alow noise floorless than2mV.The also maintains above50dBof channel separation.
The LM4753is availableina 15-lead non-isolated plastic
packageandis designedforuse inTV applications requiring
single supply operation.
Key Specifications Output powerinto8Ωat 10% THD 10W Maximum operating voltage 28V Power output stage Noise floor2mV Line output Noise floor55μV 0V–5VDC controlled volume attenuation 80dB Mute attenuation 75dB Standby-mode supply current7mA
Features Quiet fade-in/out mute function Stereo variable line-out pinsAC output short circuit protection Thermal shutdown protection
Applications Stereo TVs Component stereo Compact stereo
Typical ApplicationDS100043-1
FIGURE1. Typical Audio Amplifier Application CircuitJune 1999
LM4753
Dual
10W
Audio
Power
Amplifier
w/Mute,
Standby
and
olume
Control©1999 National Semiconductor Corporation DS100043
