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LM4882 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM4882
Description  250mW Audio Power Amplifier with Shutdown Mode
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4882 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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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
Ω load with 1% (THD + N) from a 5V power supply.
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 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+Nat1kHz at 250 mW
continuous average output
power into 8
1.0% (max)
n
Output Power at 1% THD+N
at 1kHz into 4
380mW (typ)
n
THD+Nat1kHz at 85 mW
continuous average output
power into 32
0.1% (typ)
n
Shutdown Current
0.7 µA (typ)
Features
n
MSOP surface mount packaging
n
“Click and Pop” Suppression Circuitry
n
Supply voltages from 2.4V–5.5V
n
Operating Temperature −40˚C to 85˚C
n
Unity-gain stable
n
External gain configuration capability
n
No bootstrap capacitors, or snubber circuits are
necessary
Applications
n
Personal Computers
n
Cellular Phones
n
General Purpose Audio
Typical Application
Connection Diagram
Boomer® is a registered trademark of National Semiconductor Corporation.
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
MSOP and SOIC Package
DS100030-2
Top View
Order Number LM4882MM or LM4882M
See NS Package Number MUA08A or M08A
January 1998
© 1998 National Semiconductor Corporation
DS100030
www.national.com


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