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LM4873MTE-1 Datasheet

  • LM4873MTE-1

  • Dual 2.1W Audio Amplifier Plus Stereo Headphone Function

  • 535.09KB

  • 19頁

  • NSC

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LM4873 Dual 2.1W Audio Amplifier Plus Stereo Headphone Function
April 2000
LM4873
Dual 2.1W Audio Amplifier Plus Stereo Headphone
Function
General Description
The LM4873 is a dual bridge-connected audio power ampli-
fier which, when connected to a 5V supply, will deliver 2.1W
to a 4鈩?load (Note 1) or 2.4W to a 3鈩?load (Note 2)with less
than 1.0% THD+N. In addition, the headphone input pin al-
lows the amplifiers to operate in single-ended mode to drive
stereo headphones. A Mux Control pin toggles between the
two stereo sets of amplifier inputs, allowing for two select-
able amplifier closed-loop responses.
Boomer audio power amplifiers were designed specifically to
provide high quality output power from a surface mount
package while requiring few external components. To sim-
plify audio system design, the LM4873 combines dual bridge
speaker amplifiers and stereo headphone amplifiers on one
chip.
The LM4873 features an externally controlled, low-power
consumption shutdown mode, a stereo headphone amplifier
mode, and thermal shutdown protection. It also utilizes cir-
cuitry to reduce 鈥渃licks and pops鈥?during device turn-on.
Note 1:
An LM4873MTE-1 which has been properly mounted to the circuit
board will deliver 2.1W into 4鈩? The other package options for the LM4873
will deliver 1.1W into 8鈩? See the Application Information section for
LM4873MTE-1 usage information.
Note 2:
An LM4873MTE-1 which has been properly mounted to the circuit
board and forced-air cooled will deliver 2.4W into 3鈩?
Key Specifications
n
P
O
at 1% THD+N
into 3鈩?(LM4873MTE-1)
into 4鈩?(LM4873MTE-1)
into 4鈩?(LM4873MTE)
into 8鈩?(LM4873)
n
Single-ended mode - THD+N
at 75mW into 32鈩?/div>
n
Shutdown current
2.4W(typ)
2.1W(typ)
1.9W(typ)
1.1W(typ)
0.5%(max)
0.7碌A(typ)
Features
n
n
n
n
n
Input mux control and two separate inputs per channel
Stereo headphone amplifier mode
鈥淐lick and pop鈥?suppression circuitry
Thermal shutdown protection circuitry
Exposed-DAP TSSOP and TSSOP packaging available
Applications
n
Multimedia monitors
n
Portable and desktop computers
n
Portable audio systems
Typical Application
DS100993-31
*
Refer to the section Proper Selection of External Components, for a detailed discussion of C
B
size.
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 2000 National Semiconductor Corporation
DS100993
www.national.com

LM4873MTE-1 產品屬性

  • 48

  • 集成電路 (IC)

  • 線性 - 音頻放大器

  • Boomer®

  • AB 類

  • 2-通道（立體聲）帶立體聲耳機

  • 3W x 2 @ 3 歐姆; 440mW x 2 @ 8 歐姆

  • 2 V ~ 5.5 V

  • 消除爆音，輸入多路復用器，關機，熱保護

  • 表面貼裝

  • 28-TSSOP 裸露焊盤

  • 28-SOIC（0.173"，4.40mm 寬）裸露焊盤

  • 管件

  • *LM4873MTE-1

LM4873MTE-1相關型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    National Semiconductor [1W Stereo Audio Amplifier Plus Adju...
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    Low Voltage High Power Audio Power Amplifier
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  • 英文版
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  • 英文版
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  • 英文版
    National Semiconductor [1W Stereo Audio Amplifier + Adjusta...
    NSC
  • 英文版
    1W Stereo Audio Amplifier Plus Adjustable Output Limiter Plu...
    NSC
  • 英文版
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    NATIONAL
  • 英文版
    350mW Audio Power Amplifier with Shutdown Mode
    NSC
  • 英文版
    350mW Audio Power Amplifier with Shutdown Mode
    NATIONAL
  • 英文版
    350mW Audio Power Amplifier with Shutdown Mode
    NSC
  • 英文版
    350mW Audio Power Amplifier with Shutdown Mode
    NATIONAL

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