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LM4755_02 Datasheet

  • LM4755_02

  • Stereo 11W Audio Power Amplifier with Mute

  • 789.71KB

  • 23頁

  • NSC

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LM4755 Stereo 11W Audio Power Amplifier with Mute
May 2002
LM4755
Stereo 11W Audio Power Amplifier with Mute
General Description
The LM4755 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 internal mute circuit and pre-set gain
resistors provide for a very economical design solution.
Output power specifications at both 20V and 24V supplies
and low external component count offer high value to con-
sumer electronic manufacturers for stereo TV and compact
stereo applications. The LM4755 is specifically designed for
single supply operation.
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
Drives 4鈩?and 8鈩?loads
Integrated mute function
Internal Gain Resistors
Minimal external components needed
Single supply operation
Internal current limiting and thermal protection
Compact 9-lead TO-220 package
Wide supply range 9V - 40V
Key Specifications
n
Output power at 10% THD with 1kHz into 4鈩?at
V
CC
= 24V: 11W (typ)
n
Output power at 10% THD with 1kHz into 8鈩?at
V
CC
= 24V: 7W (typ)
n
Closed loop gain: 34dB (typ)
n
P
O
at 10% THD+N
@
1kHz into 4鈩?single-ended
TO-263 package at V
CC
=12V: 2.5W (typ)
Applications
n
Stereos TVs
n
Compact stereos
n
Mini component stereos
Typical Application
10005901
FIGURE 1. Typical Audio Amplifier Application Circuit
漏 2004 National Semiconductor Corporation
DS100059
www.national.com

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