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LM4880 Datasheet

  • LM4880

  • Dual 250 mW Audio Power Amplifier with Shutdown Mode

  • 12頁

  • NSC

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LM4880 Boomer Audio Power Amplifier Series Dual 250 mW Audio Power Amplifier with
Shutdown Mode
November 1995
LM4880
Dual 250 mW Audio Power Amplifier with Shutdown
Mode
General Description
The LM4880 is a dual audio power amplifier capable of deliv-
ering typically 250 mW per channel of continuous average
power to an 8鈩?load with 0.1% (THD) using a 5V power sup-
ply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components using surface mount packaging.
Since the LM4880 does not require bootstrap capacitors or
snubber networks, it is optimally suited for low-power por-
table systems.
The LM4880 features an externally controlled, low-power
consumption shutdown mode, as well as an internal thermal
shutdown protection mechanism.
The unity-gain stable LM4880 can be configured by external
gain-setting resistors.
n
THD at 1 kHz at 85 mW continuous average output
power into 32鈩? 0.1% (typ)
n
Output power at 10% THD + N at 1 kHz into 8鈩?
325 mW (typ)
n
Shutdown Current: 0.7 碌A(chǔ) (typ)
Features
n
No bootstrap capacitors or snubber circuits are
necessary
n
Small Outline (SO) and DIP packaging
n
Unity-gain stable
n
External gain configuration capability
Applications
n
Headphone Amplifier
n
Personal Computers
n
CD-ROM Players
Key Specifications
n
THD at 1 kHz at 200 mW continuous average output
power into 8鈩? 0.1% (max)
Typical Application
DS012343-1
*
Refer to the
Application Information
section for information concerning proper selection of the input and output coupling capacitors.
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 1999 National Semiconductor Corporation
DS012343
www.national.com

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