LM4752 Datasheet, PDF (1/18 Pages) National Semiconductor (TI) – Stereo 11W Audio Power Amplifier

February 1999
LM4752
Stereo 11W Audio Power Amplifier
General Description
The LM4752 is a stereo audio amplifier capable of delivering
11W per channel of continuous average output power to a
4Ω load, or 7W per channel into 8Ω using a single 24V sup-
ply at 10% THD+N.
The LM4752 is specifically designed for single supply opera-
tion and a low external component count. The gain and bias
resistors are integrated on chip, resulting in a 11W stereo
amplifier in a compact 7 pin TO220 package. High output
power levels at both 20V and 24V supplies and low external
component count offer high value for compact stereo and TV
applications. A simple mute function can be implemented
with the addition of a few external components.
Key Specifications
n Output power at 10% THD+N with 1 kHz into 4Ω at V _CC
= 24V 11W (typ)
n Output power at 10% THD+N with 1 kHz into 8Ω at V _CC
= 24V 7W (typ)
n Closed loop gain 34 dB (typ)
n P_O at 10% THD @ 1 kHz into 4Ω Single-ended TO-263
pkg. at V_CC = 12V 2.5W (typ)
n P_O at 10% THD @ 1 kHz into 8Ω bridged TO-263 pkg.
at V_CC = 12V 5W (typ)
Features
n Drives 4Ω and 8Ω loads
n Internal gain resistors (A_V = 34 dB)
n Minimum external component requirement
n Single supply operation
n Internal current limiting
n Internal thermal protection
n Compact 7 lead TO-220 package
n Low cost-per-watt
Applications
n Compact stereos
n Stereo TVs
n Mini component stereos
n Multimedia speakers
Typical Application
Connection Diagram
Plastic Package
DS100039-2
Package Description
Top View
Order Number LM4752T
Package Number TA07B
DS100039-1
FIGURE 1. Typical Audio Amplifier Application Circuit
© 1999 National Semiconductor Corporation DS100039
DS100039-50
Package Description
Top View
Order Number LM4752TS
Package Number TS07B
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