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LM4668MH Datasheet

  • LM4668MH

  • 10W High-Efficiency Mono BTL Audio Power Amplifier

  • 470.26KB

  • 14頁

  • NSC

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LM4668 10W High-Efficiency Mono BTL Audio Power Amplifier
October 2004
LM4668
10W High-Efficiency Mono BTL Audio Power Amplifier
General Description
The LM4668 is a high efficiency switching audio power
amplifier primarily designed for demanding applications in
flat panel monitors and TV鈥檚. It is capable of delivering 6W to
an 8鈩?mono BTL load with less than 1% distortion (THD+N)
from a 12V
DC
power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4668 features a micro-power,
active-low shutdown mode, an internal thermal shutdown
protection mechanism, and short circuit protection.
The LM4668 contains advanced transient (鈥減op and click鈥?
suppression circuitry that eliminates noises that would oth-
erwise occur during turn-on and turn-off transitions.
Key Specifications
j
Power Output BTL (V
DD
= 14V,
f
IN
= 1kHz, THD+N = 10%, R
L
= 8鈩?
j
Quiescent Power Supply Current
j
Efficiency (V
DD
= 12V, f
IN
= 1kHz,
10W (typ)
30mA (typ)
79% (typ)
0.15mA (typ)
30dB (typ)
R
L
= 8鈩? P
OUT
= 6W)
j
Shutdown Current
j
Fixed Gain
Features
n
Soft-start circuitry eliminates noise during turn-on
transition
n
Low current shutdown mode
n
Low quiescent current
n
6W BTL output, R
L
= 8鈩?/div>
n
Short circuit protection
n
Fixed, internally set gain of 30dB
Applications
n
Flat Panel Monitors
n
Flat Panel TVs
n
Computer Sound Cards
Connection Diagrams
LD Package
MH Package
20089102
Top View
Order Number LM4668LD
See NS Package Number LDC14A
200891G3
Top View
Order Number LM4668MH
See NS Package Number MXA20A
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 2004 National Semiconductor Corporation
DS200891
www.national.com

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