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LM4882 Datasheet

  • LM4882

  • 250mW Audio Power Amplifier with Shutdown Mode

  • 448.41KB

  • 12頁

  • NSC

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LM4882 250mW Audio Power Amplifier with Shutdown Mode
January 1998
LM4882
250mW Audio Power Amplifier with Shutdown Mode
General Description
The LM4882 is a single-ended audio power amplifier ca-
pable of delivering 250 mW of continuous average power
into an 8鈩?load with 1% (THD + N) from a 5V power supply.
Boomer
廬
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 LM4882 does not require bootstrap capacitors or
snubber networks, it is optimally suited for low-power por-
table systems.
The LM4882 features an externally controlled, low power
consumption shutdown mode which is virtually clickless and
popless, as well as an internal thermal shutdown protection
mechanism.
The unity-gain stable LM4882 can be configured by external
gain-setting resistors.
Key Specifications
n
THD + N at 1 kHz at 250 mW
continuous average output
power into 8鈩?/div>
n
Output Power at 1% THD + N
at 1kHz into 4鈩?/div>
n
THD + N at 1 kHz at 85 mW
continuous average output
power into 32鈩?/div>
n
Shutdown Current
1.0% (max)
380mW (typ)
0.1% (typ)
0.7 碌A(chǔ) (typ)
Features
n
n
n
n
n
n
n
MSOP surface mount packaging
鈥淐lick and Pop鈥?Suppression Circuitry
Supply voltages from 2.4V鈥?.5V
Operating Temperature 鈭?0藲C to 85藲C
Unity-gain stable
External gain configuration capability
No bootstrap capacitors, or snubber circuits are
necessary
Applications
n
Personal Computers
n
Cellular Phones
n
General Purpose Audio
Typical Application
Connection Diagram
MSOP and SOIC Package
DS100030-2
Top View
Order Number LM4882MM or LM4882M
See NS Package Number MUA08A or M08A
DS100030-1
*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 1998 National Semiconductor Corporation
DS100030
www.national.com

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