LM4952 Datasheet, PDF (1/20 Pages) National Semiconductor (TI) – 3.1W Stereo-SE Audio Power Amplifier with DC Volume Control

August 2004
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 12V_DC 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 P_OUT
V_DD = 12V, R_L = 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, R_L = 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
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