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LM4880 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM4880
Description  Dual 250 mW Audio Power Amplifier with Shutdown Mode
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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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
Ω 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.
Key Specifications
n THD at 1 kHz at 200 mW continuous average output
power into 8
Ω: 0.1% (max)
n THD at 1 kHz at 85 mW continuous average output
power into 32
Ω: 0.1% (typ)
n Output power at 10% THD+Nat1kHz into 8
Ω:
325 mW (typ)
n Shutdown Current:
0.7 µA (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
Typical Application
Boomer® is a registered trademark of National Semiconductor Corporation.
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
November 1995
© 1999 National Semiconductor Corporation
DS012343
www.national.com




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