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LM4810LD Datasheet

  • LM4810LD

  • National Semiconductor [Dual 105mW Headphone Amplifier with...

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  • NSC

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LM4810 Dual 105mW Headphone Amplifier with Active-High Shutdown Mode
November 2002
LM4810
Dual 105mW Headphone Amplifier with Active-High
Shutdown Mode
General Description
The LM4810 is a dual audio power amplifier capable of
delivering 105mW per channel of continuous average power
into a 16鈩?load with 0.1% (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. Since the LM4810 does not require
bootstrap capacitors or snubber networks, it is optimally
suited for low-power portable systems.
The unity-gain stable LM4810 can be configured by external
gain-setting resistors.
The LM4810 features an externally controlled, active-high,
micropower consumption shutdown mode, as well as an
internal thermal shutdown protection mechanism.
n
THD+N at 1kHz, 70mW continuous average power into
32鈩?/div>
0.1% (typ)
n
Shutdown Current
0.4碌A (typ)
Features
n
n
n
n
n
n
Active-high shutdown mode
LLP, MSOP, and SO surface mount packaging
"Click and Pop" suppression circuitry
Low shutdown current
No bootstrap capacitors required
Unity-gain stable
Applications
n
n
n
n
Cellular Phones
Personal Computers
Microphone Preamplifier
PDA鈥檚
Key Specifications
n
THD+N at 1kHz, 105mW continuous average power into
16鈩?/div>
0.1% (typ)
Typical Application
20008901
*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
庐
is a registered trademark of National Semiconductor Corporation.
漏 2002 National Semiconductor Corporation
DS200089
www.national.com

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