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LM4755T Datasheet

  • LM4755T

  • National Semiconductor [Stereo 11W Audio Power Amplifier wi...

  • NSC

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LM4755 Stereo 11W Audio Power Amplifier with Mute
February 1999
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 re-
sistors 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
@
1 kHz into 8鈩?bridged TO-263 pkg.
at V
CC
= 12V 5W(typ)
Features
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
Key Specifications
n
Output power at 10% THD with 1 kHz into 4鈩?at V
CC
=
24V 11W(typ)
n
Output power at 10% THD with 1 kHz into 8鈩?at V
CC
=
24V 7W(typ)
n
Closed loop gain 34 dB(typ)
n
P
O
at 10% THD
@
1 kHz into 4鈩?single-ended TO-263
pkg. at V
CC
= 12V 2.5W(typ)
Applications
n
Stereos TVs
n
Compact stereos
n
Mini component stereos
Typical Application
Connection Diagrams
Plastic Package
DS100059-2
Package Description
Top View
Order Number LM4755T
Package Number TA09A
DS100059-36
DS100059-1
FIGURE 1. Typical Audio Amplifier Application Circuit
Top View
Order Number LM4755TS
Package Number TS9A
漏 1999 National Semiconductor Corporation
DS100059
www.national.com

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