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LM4902MM Datasheet

  • LM4902MM

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

  • 18頁(yè)

  • NSC

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LM4902 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode
February 2002
LM4902
265mW at 3.3V Supply Audio Power Amplifier with
Shutdown Mode
General Description
The LM4902 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 LM4902 does not require output coupling
capacitors, bootstrap capacitors or snubber networks, it is
optimally suited for low-power portable applications.
The LM4902 features an externally controlled, low power
consumption shutdown mode, and thermal shutdown protec-
tion.
The closed loop response of the unity-gain stable LM4902
can be configured by external gain-setting resistors.
j
THD+N at 1kHz for 675mW continuous
average output power into 8鈩?
V
DD
= 5V
j
Shutdown current
1.0% (max)
0.1碌A(chǔ) (typ)
Features
n
MSOP and LLP 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
Key Specifications
j
THD+N at 1kHz for 265mW continuous
Applications
n
Cellular phones
n
PDA鈥檚
n
Any portable audio application
1.0% (max)
average output power into 8鈩?
V
DD
= 3.3V
Typical Application
20029801
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 2002 National Semiconductor Corporation
DS200298
www.national.com

LM4902MM 產(chǎn)品屬性

  • National Semiconductor (TI)

  • Class-AB

  • 0.675 W x 1 at 8 Ohms

  • 1-Channel Mono

  • 0.4 %

  • 3 V, 5 V

  • + 85 C

  • SMD/SMT

  • MSOP

  • Reel

  • 8 Ohms

  • Single

  • - 40 C

  • Differential

  • Single

  • 5.5 V

  • 2 V

LM4902MM相關(guān)型號(hào)PDF文件下載

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