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PDF LM4952 Data sheet ( Hoja de datos )
| Número de pieza | LM4952 | |
| Descripción | 3.1W Stereo-SE Audio Power Amplifier | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LM4952 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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August 2004
www.DataSheet4U.com
LM4952
3.1W Stereo-SE Audio Power Amplifier
with DC Volume Control
General Description
The LM4952 is a dual audio power amplifier primarily de-
signed for demanding applications in flat panel monitors and
TV’s. It is capable of delivering 3.1 watts per channel to a 4Ω
single-ended load with less than 1% THD+N when powered
by a 12VDC power supply.
Eliminating external feedback resistors, an internal, DC-
controlled, volume control allows easy and variable gain
adjustment.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4952 does not require boot-
strap capacitors or snubber circuits. Therefore, it is ideally
suited for display applications requiring high power and mini-
mal size.
The LM4952 features a low-power consumption active-low
shutdown mode. Additionally, the LM4952 features an inter-
nal thermal shutdown protection mechanism along with short
circuit protection.
The LM4952 contains advanced pop & click circuitry that
eliminates noises which would otherwise occur during
turn-on and turn-off transitions.
Key Specifications
j Quiscent Power Supply Current
j POUT
VDD = 12V, RL = 4Ω, 10% THD+N
j Shutdown current
18mA (typ)
3.8W (typ)
55µA (typ)
Features
n Pop & click circuitry eliminates noise during turn-on and
turn-off transitions
n Low current, active-low shutdown mode
n Low quiescent current
n Stereo 3.8W output, RL = 4Ω
n DC-controlled volume control
n Short circuit protection
Applications
n Flat Panel Monitors
n Flat panel TV’s
n Computer Sound Cards
Connection Diagram
200809E9
Top View
Order Number LM4952TS
See NS Package Number TS9A
U = Wafer Fab Code
Z = Assembly Plant Code
XY = Date Coce
TT = Die Traceability
L4952TS = LM4952TS
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS200809
www.national.com
1 page  
Typical Performance Characteristics AV = 20dB and TA = 25˚C, unless otherwise noted.
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THD+N vs Frequency
THD+N vs Frequency
VDD = 12V, RL = 4Ω,
POUT = 2W, CIN = 1.0µF
200809F8
THD+N vs Output Power
VDD = 12V, RL = 8Ω,
POUT = 1W, CIN = 1.0µF
200809F9
THD+N vs Output Power
VDD = 12V, RL = 4Ω,
fIN = 1kHz
200809G0
VDD = 12V, RL = 8Ω,
fIN = 1kHz
200809G1
5 www.national.com
5 Page 
Typical Performance Characteristics AV = 20dB and TA = 25˚C, unless otherwise noted.
(Continued)
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Clipping Voltage vs Power Supply Voltage
Power Dissipation vs Ambient Temperature
20080932
RL = 8Ω, fIN = 1kHz
at (from to bottom at 12.5V):
positive signal swing, negative signal swing
Power Dissipation vs Ambient Temperature
20080933
VDD = 12V, RL = 4Ω (SE), fIN = 1kHz,
(from to bottom at 80˚C): 16in2 copper plane heatsink
area, 8in2 copper plane heatsink area
20080934
VDD = 12V, RL = 8Ω, fIN = 1kHz,
(from to bottom at 120˚C): 16in2 copper plane heatsink
area, 8in2 copper plane heatsink area
11 www.national.com
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet LM4952.PDF ] | |
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