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參數(shù)資料
| 型號： | LM4888 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement |
| 中文描述： | 雙2.1W音頻功率放大器加立體聲耳機 |
| 文件頁數(shù)： | 1/22頁 |
| 文件大?。?/td> | 1179K |
| 代理商： | LM4888 |
LM4888
Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D
Enhancement
General Description
The LM4888 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.
A user selectable “National 3D Enhancement” mode pro-
vides enhanced stereo imaging.
The LM4888SQ also has two separate HP (headphone)
enable inputs, each having different logic level thresholds.
Either HP enable input activates the single ended head-
phone mode and disables the BTL output mode. The HP
Sense input is for use with a normal stereo headphone jack.
The remaining input, HP Logic, accepts standard logic level
thresholds.
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 LM4888SQ combines dual
bridge speaker amplifiers and stereo headphone amplifiers
on one chip.
The LM4888SQ features a low-power consumption shut-
down mode and thermal shutdown protection. It also utilizes
circuitry to reduce “clicks and pops” during device turn-on.
Note 1:
An LM4888SQ that has been properly mounted to a circuit board
will deliver 2.1W into 4
. See the Application Information sections for further
information concerning the LM4888SQ.
Note 2:
An LM4888SQ that has been properly mounted to a circuit board
and forced-air cooled will deliver 2.4W into 3
.
Key Specifications
j
P
O
at 1% THD+N, V
DD
= 5V
R
L
= 3
R
L
= 4
R
L
= 8
j
Single-ended mode THD+N
at 75mW into 32
(5V, 1kHz)
j
Shutdown current
j
Supply voltage range
j
PSRR at 217Hz
2.4W (typ)
2.1W (typ)
1.3W (typ)
0.01% (typ)
0.04μA (typ)
2.7V to 5.5V
85dB (typ)
Features
n
National 3D Enhancement
n
Selectable headphone enable modes
n
Stereo headphone amplifier mode
n
Improved “click and pop” suppression circuitry
n
Thermal shutdown protection circuitry
n
PCB area-saving SQ package
n
Micro power shutdown mode
Applications
n
Cell phones
n
Multimedia monitors
n
Portable and desktop computers
n
Portable audio systems
Connection Diagrams
LM4888SQ
LM4888SQ Top Mark
20111602
Top View
Order Number LM4888SQ
See NS Package Number SQA24A
201116C6
Top View
U = Fab Code
Z = Assembly Plant Code
XY = Date Code
TT = Die Traceability
Boomer
is a registered trademark of National Semiconductor Corporation.
June 2005
L
2005 National Semiconductor Corporation
DS201116
www.national.com
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM4888_06 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement |
| LM4888A E WAF | 制造商:Texas Instruments 功能描述: |
| LM4888SQ | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement |
| LM4888SQ/NOPB | 功能描述:IC AMP AUDIO PWR 3W STER 24LLP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 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，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4888SQBD | 功能描述:BOARD EVALUATION LM4888SQ RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 音頻放大器 系列:Boomer® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
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