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LM4756

National Semiconductor
Part Number LM4756
Manufacturer National Semiconductor
Description Dual 7W Audio Power Amplifier
Published Mar 22, 2005
Detailed Description LM4756 Dual 7W Audio Power Amplifier w/Mute, Standby and Volume Control September 2003 LM4756 Dual 7W Audio Power Ampl...
Datasheet PDF File LM4756 PDF File

LM4756
LM4756

Overview
LM4756 Dual 7W Audio Power Amplifier w/Mute, Standby and Volume Control September 2003 LM4756 Dual 7W Audio Power Amplifier w/Mute, Standby and Volume Control General Description The LM4756 is a stereo audio amplifier capable of delivering 7W/channel at 10% distortion into a 4Ω or 8Ω load.
The power amp has an internally set gain of 30dB.
A 0V–5V DC controlled volume block provides 80dB of attenuation from input to line-out.
Line outputs are available after the volume control 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 75dB of attenuation.
The LM4756 maintains an excellent Signal-to-Noise ratio of greater than 70dB with a low noise floor less than 2mV.
The IC also maintains above 50dB of channel separation.
The LM4756 is available in a 15-lead non-isolated plastic package and is designed for use in TV applications requiring single supply operation.
Key Specifications n n n n n n n Output power into 4Ω or 8Ω at 10% THD Maximum operating voltage Power output stage Noise floor Line output Noise floor 0V–5V DC controlled volume attenuation Mute attenuation Standby-mode supply current 7W (typ) 28V (max) 2mV (typ) 55µV (typ) 80dB (typ) 75dB (typ) 7mA (typ) Features n n n n Quiet fade-in/out mute function Stereo variable line-out pins AC output short circuit protection Thermal shutdown protection Applications n Audio amplifier for stereo TVs n Audio amplifier component stereo n Audio amplifier compact stereo Connection Diagrams Plastic Package Plastic Package 20064444 20064433 Top View Order Number LM4756TA See NS Package Number TA15A 90 Degree Lead Bend Order Number LM4756TA Spec.
LB10 See NS Package Number TA15D Top View U - Wafer Fab Code Z - Assembly Plant Code XY - Date Code TT - Die Traceability LM4756TA - LM4756TA © 2003 National Semiconductor Corporation DS200644 www.
national.
com LM4756 Typical Application...


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