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參數(shù)資料
| 型號： | LM4873MTE |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Dual 2.1W Audio Amplifier Plus Stereo Headphone Function |
| 中文描述： | 2.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封裝： | 6.50 X 4.40 MM, 0.90 MM HEIGHT, TSSOP-20 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大?。?/td> | 532K |
| 代理商： | LM4873MTE |
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
load (Note 1) or 2.4W to a 3
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 “clicks and pops” during device turn-on.
Note 1:
An LM4873MTE-1 which has been properly mounted to the circuit
board will deliver 2.1W into 4
. The other package options for the LM4873
will deliver 1.1W into 8
. 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
.
Key Specifications
n
P
O
at 1% THD+N
into 3
(LM4873MTE-1)
into 4
(LM4873MTE-1)
into 4
(LM4873MTE)
into 8
(LM4873)
n
Single-ended mode - THD+N
at 75mW into 32
n
Shutdown current
2.4W(typ)
2.1W(typ)
1.9W(typ)
1.1W(typ)
0.5%(max)
0.7μA(typ)
Features
n
Input mux control and two separate inputs per channel
n
Stereo headphone amplifier mode
n
“Click and pop” suppression circuitry
n
Thermal shutdown protection circuitry
n
Exposed-DAP TSSOP and TSSOP packaging available
Applications
n
Multimedia monitors
n
Portable and desktop computers
n
Portable audio systems
Typical Application
Boomer
is a registered trademark of National Semiconductor Corporation.
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
April 2000
L
2000 National Semiconductor Corporation
DS100993
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4873MTE/NOPB | 功能描述:音頻放大器 Dual 2.1W Audio Amp Plus Stereo HdPh Fcn RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4873MTE-1 | 功能描述:IC AMP AUDIO PWR 3W STER 28TSSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4873MTE-1/NOPB | 制造商:Texas Instruments 功能描述:IC AMP AUDIO PWR 3W STER 28TSSOP |
| LM4873MTEX | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4873MTEX/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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