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參數(shù)資料
| 型號(hào)： | LM4681SQ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 10 Watt Stereo CLASS D Audio Power Amplifier with Stereo Headphone Amplifier and I2C/SPI Volume Control |
| 中文描述： | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC48 |
| 封裝： | LLP-48 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大?。?/td> | 983K |
| 代理商： | LM4681SQ |
LM4681
10 Watt Stereo CLASS D Audio Power Amplifier with
Stereo Headphone Amplifier and I
2C/SPI Volume Control
General Description
The LM4681 is a fully integrated single supply, CLASS D
audio power amplifier solution. The LM4681 utilizes a pro-
prietary balanced pulse-width modulation technique that low-
ers output noise and THD and improves PSRR when com-
pared to conventional pulse width modulators.
The LM4681 also features a stereo headphone amplifier that
delivers 80mW into a 32
headset with less than 0.5% THD.
The LM4681’s I
2C/SPI (selectable) volume control has a
+30dB to –48dB range when speakers are driven and a
range of +13dB to –65dB when headphones are connected.
All amplifiers are protected by thermal shutdown. Addition-
ally, the high efficiency power amplifiers have output current
limit.
With a 8
load, the IC’s efficiency for a 6W power level is
85%. The IC features click and pop reduction circuitry that
minimizes audible popping during device turn-on and turn-
off. The LM4681 is available in a 48-lead LLP package, ideal
for portable and desktop computer applications.
Key Specifications
n
P
O at THD+N =10%, AV = 30dB, VDD = 14V
10W (typ)
n
THD+N at 1kHz at 1W into 8
(Power Amp) 0.43% (typ)
n
Efficiency at 7W into 8
85% (min)
n
Total quiescent power supply current
50mA (typ)
n
THD+N 1kHz, 20mW, 32
(Headphone)
0.02% (typ)
n
Single supply range
9.0V to 15.5V
Features
n
Pulse-width modulator.
n
I
2C/SPI (selectable) volume control
n
Stereo headphone amplifier.
n
“Click and pop” suppression circuitry.
n
Micropower shutdown mode.
n
48 lead LLP package (No heatsink required).
Applications
n
Flat Panel Displays
n
Televisions
n
Multimedia Monitors
Block Diagram
20118922
Block Diagram for LM4681
BOOMER is a trademark of National Semiconductor Corporation.
March 2006
LM4681
10
W
att
Stereo
CLASS
D
Audio
Power
Amplifier
with
Stereo
Headphone
Amplifier
and
I2C/SPI
V
olume
Control
2006 National Semiconductor Corporation
DS201189
www.national.com
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| LM4681SQ/NOPB | 功能描述:IC AMP AUDIO PWR 10W STER 48LLP 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(shí)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(diǎn):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) |
| LM4681SQX/NOPB | 功能描述:IC AMP AUDIO PWR 10W STER 48LLP 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(shí)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(diǎn):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) |
| LM4682 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:10 Watt Stereo CLASS D Audio Power Amplifier with Stereo Headphone Amplifier and DC Volume Control |
| LM4682B E WAF | 制造商:Texas Instruments 功能描述: |
| LM4682SQ | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:10 Watt Stereo CLASS D Audio Power Amplifier with Stereo Headphone Amplifier and DC Volume Control |
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