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LM4818 Datasheet

  • LM4818

  • 350mW Audio Power Amplifier with Shutdown Mode

  • 16頁

  • NSC

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LM4818 350mW Audio Power Amplifier with Shutdown Mode
April 2002
LM4818
350mW Audio Power Amplifier with Shutdown Mode
General Description
The LM4818 is a mono bridged power amplifier that is ca-
pable of delivering 350mW
RMS
output power into a 16鈩?load
or 300mW
RMS
output power into an 8鈩?load with 10%
THD+N from a 5V power supply.
The LM4818 Boomer audio power amplifier is designed
specifically to provide high quality output power and mini-
mize PCB area with surface mount packaging and a minimal
amount of external components. Since the LM4818 does not
require output coupling capacitors, bootstrap capacitors or
snubber networks, it is optimally suited for low-power por-
table applications.
The closed loop response of the unity-gain stable LM4818
can be configured using external gain-setting resistors. The
device is available in SO package type to suit various appli-
cations.
Key Specifications
n
THD+N at 1kHz, 350mW continuous average output
power into 16鈩?/div>
10% (max)
n
THD+N at 1kHz, 300mW continuous average output
power into 8鈩?/div>
10% (max)
n
Shutdown Current
0.7碌A (typ)
Features
n
n
n
n
SOP surface mount packaging.
Switch on/off click suppression.
Unity-gain stable.
Minimum external components.
Applications
n
General purpose audio
n
Portable electronic devices
n
Information Appliances (IA)
Typical Application
DS200389-1
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 2002 National Semiconductor Corporation
DS200389
www.national.com

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