LM4752 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
4鈩?load, or 7W per channel into 8鈩?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.
n
P
O
at 10% THD
@
1 kHz into 8鈩?bridged TO-263 pkg.
at V
CC
= 12V 5W (typ)
Features
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n
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Drives 4鈩?and 8鈩?loads
Internal gain resistors (A
V
= 34 dB)
Minimum external component requirement
Single supply operation
Internal current limiting
Internal thermal protection
Compact 7 lead TO-220 package
Low cost-per-watt
Key Specifications
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Output power at 10% THD+N with 1 kHz into 4鈩?at V
CC
= 24V 11W (typ)
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Output power at 10% THD+N with 1 kHz into 8鈩?at V
CC
= 24V 7W (typ)
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Closed loop gain 34 dB (typ)
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P
O
at 10% THD
@
1 kHz into 4鈩?Single-ended TO-263
pkg. at V
CC
= 12V 2.5W (typ)
Applications
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Compact stereos
Stereo TVs
Mini component stereos
Multimedia speakers
Typical Application
Connection Diagram
Plastic Package
DS100039-2
Package Description
Top View
Order Number LM4752T
Package Number TA07B
DS100039-50
DS100039-1
FIGURE 1. Typical Audio Amplifier Application Circuit
Package Description
Top View
Order Number LM4752TS
Package Number TS07B
漏 1999 National Semiconductor Corporation
DS100039
www.national.com