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LM4853 Datasheet

  • LM4853

  • Mono 1.5 W / Stereo 300mW Power Amplifier

  • 17頁

  • NSC

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LM4853 Mono 1.5 W / Stereo 300mW Power Amplifier
January 2003
LM4853
Mono 1.5 W / Stereo 300mW Power Amplifier
General Description
The LM4853 is an audio power amplifier capable of deliver-
ing 1.5W (typ) of continuous average power into a mono 4鈩?/div>
bridged-tied load (BTL) with 1% THD+N or 95mW per chan-
nel of continuous average power into stereo 32鈩?single-
ended (SE) loads with 1% THD+N, using a 5V power supply.
The LM4853 can automatically switch between mono BTL
and stereo SE modes utilizing a headphone sense pin. It is
ideal for any system that provides both a monaural speaker
output and a stereo line or headphone output
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. Since the LM4853 does not require
bootstrap capacitors or snubber networks, it is optimally
suited for low-power portable systems.
The LM4853 features an externally controlled, micropower
consumption shutdown mode and thermal shutdown protec-
tion. The unity-gain stable LM4853鈥檚 gain is set by external
gain-setting resistors
Key Specifications
n
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Output Power at 1% THD+N, 1kHz:
LM4853LD 3鈩?BTL
LM4853LD 4鈩?BTL
LM4853MM 4鈩?BTL
LM4853MM,LD 8鈩?BTL
LM4853MM,LD 8鈩?SE
LM4853MM,LD 32鈩?SE
THD+N at 1kHz, 95mW into 32鈩?SE
Single Supply Operation
Shutdown Current
1.9W (typ)
1.7W (typ)
1.5W (typ)
1.1W (typ)
300mW (typ)
95mW (typ)
1% (typ)
2.4 to 5.5V
18碌A(chǔ) (typ)
Features
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Mono 1.5W BTL or stereo 300mW output
Headphone sense
鈥淐lick and pop鈥?suppression circuitry
No bootstrap capacitors required
Thermal shutdown protection
Unity-gain stable
Available in space-saving MSOP and LLP packaging
Applications
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Portable computers
Desktop computers
PDA鈥檚
Handheld games
Connection Diagrams
20033429
Top View
10 Lead MSOP
Order Number LM4853MM
See NS Package Number MUB10A
20033428
Top View
14 Lead LLP
Order Number LM4853LD
See NS Package Number LDA14A
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 2003 National Semiconductor Corporation
DS200334
www.national.com

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