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LM4752_00 Datasheet

  • LM4752_00

  • Stereo 11W Audio Power Amplifier

  • 22頁

  • NSC

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LM4752 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
4鈩?load, or 7W per channel into 8鈩?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.
n
P
O
at 10% THD+N
@
1kHz into 8鈩?bridged TO-263
package at V
CC
= 12V: 5W (typ)
Features
n
n
n
n
n
n
n
n
n
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
Wide supply range 9V - 40V
Key Specifications
n
Output power at 10% THD+N with 1kHz into 4鈩?at
V
CC
= 24V: 11W (typ)
n
Output power at 10% THD+N with 1kHz into 8鈩?at
V
CC
= 24V: 7W (typ)
n
Closed loop gain: 34dB (typ)
n
P
O
at 10% THD+N
@
1 kHz into 4鈩?single-ended
TO-263 package at V
CC
= 12V: 2.5W (typ)
Applications
n
n
n
n
Compact stereos
Stereo TVs
Mini component stereos
Multimedia speakers
Typical Application
10003901
FIGURE 1. Typical Audio Amplifier Application Circuit
漏 2004 National Semiconductor Corporation
DS100039
www.national.com

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