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LM4864 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM4864
Description  300 mW Audio Power Amplifier with Shutdown Mode
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4864 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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LM4864
300 mW Audio Power Amplifier with Shutdown Mode
General Description
The LM4864 is a bridged audio power amplifier capable of
delivering 300 mW of continuous average power into an 8
load with 1% (THD) from a 5V power supply.
Boomer® audio power amplifiers were designed specifically
to provide high quality output power from a low supply volt-
age while requiring a minimal amount of external compo-
nents. Since the LM4864 does not require output coupling
capacitors, bootstrap capacitors or snubber networks, it is
optimally suited for low-power portable applications.
The LM4864 features an externally controlled, low power
consumption shutdown mode, and thermal shutdown protec-
tion.
The closed loop response of the unity-gain stable LM4864,
can be configured by external gain-setting resistors. The de-
vice is available in multiple package types to suit various ap-
plications.
Key Specifications
n THD at 1 kHz at 300 mW continuous
average output power into 8
1.0% (max)
n THD at 1 kHz at 300 mW continuous
average output power into 16
1.0% (max)
n Shutdown current
0.7 µA (typ)
Features
n MSOP, SOP, and DIP packaging
n No output coupling capacitors, bootstrap capacitors, or
snubber circuits are necessary
n Thermal shutdown protection circuitry
n Unity-gain stable
n External gain configuration capability
Applications
n Cellular Phones
n Personal Computers
n General Purpose Audio
Typical Application
Connection Diagram
Boomer® is a registered trademark of National Semiconductor Corporation.
DS012607-1
FIGURE 1. Typical Audio Amplifier Application Circuit
MSOP, SOP, and DIP Package
DS012607-2
Top View
Order Number LM4864MM,
LM4864M or LM4864N
See NS Package Number MUA08A,
M08A or N08E
September 1999
© 1999 National Semiconductor Corporation
DS012607
www.national.com


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