LM4752_00 Datasheet, PDF (1/22 Pages) National Semiconductor (TI) – Stereo 11W Audio Power Amplifier

August 2000
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
supply 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 1kHz into 4Ω at
V_CC = 24V: 11W (typ)
n Output power at 10% THD+N with 1kHz into 8Ω at
V_CC = 24V: 7W (typ)
n Closed loop gain: 34dB (typ)
n P_O at 10% THD+N @ 1 kHz into 4Ω single-ended
TO-263 package at V_CC = 12V: 2.5W (typ)
n P_O at 10% THD+N @ 1kHz into 8Ω bridged TO-263
package 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
n Wide supply range 9V - 40V
Applications
n Compact stereos
n Stereo TVs
n Mini component stereos
n Multimedia speakers
Typical Application
10003901
FIGURE 1. Typical Audio Amplifier Application Circuit
© 2004 National Semiconductor Corporation DS100039
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