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MUA08A Datasheet

  • MUA08A

  • 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mod...

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  • 19頁

  • NSC

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LM4900 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode
September 2001
LM4900
265mW at 3.3V Supply Audio Power Amplifier with
Shutdown Mode
General Description
The LM4900 is a bridged audio power amplifier capable of
delivering 265mW of continuous average power into an 8鈩?/div>
load with 1% THD+N from a 3.3V power supply.
Boomer
廬
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 LM4900 does not require output coupling
capacitors, bootstrap capacitors or snubber networks, it is
optimally suited for low-power portable applications.
The LM4900 features an externally controlled, low power
consumption shutdown mode, and thermal shutdown protec-
tion.
The closed loop response of the unity-gain stable LM4900
can be configured by external gain-setting resistors.
Features
n
MSOP, LLP, and SOP 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
n
Latest generation 鈥檆lick and pop鈥?suppression circuitry
Applications
n
Cellular phones
n
PDA鈥檚
n
Any portable audio application
Key Specifications
j
THD+N at 1kHz for 265mW continuous
average output power into 8鈩?
V
DD
= 3.3V
j
THD+N at 1kHz for 675mW continuous
1.0% (max)
average output power into 8鈩?
V
DD
= 5V
j
Shutdown current
1.0% (max)
0.1碌A(chǔ) (typ)
Typical Application
DS200064-1
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 2001 National Semiconductor Corporation
DS200064
www.national.com

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  • 英文版
    265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mod...
    NSC
  • 英文版
    265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mod...
    NSC [Natio...
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    1W, Bypass-Capacitor-less Audio Amplifier with Internal Sele...
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