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參數(shù)資料
| 型號： | LM4854MM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 0.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| 封裝： | 0.118 INCH, 0.50 MM PITCH, TSSOP-10 |
| 文件頁數(shù)： | 10/23頁 |
| 文件大?。?/td> | 1795K |
| 代理商： | LM4854MM |
Application Information (Continued)
C
i =1/(2πRifL)
(14)
The result is
1/(2
π x 20k x 20Hz) = 0.397F
(15)
Use a 0.39F capacitor, the closest standard value.
The product of the desired high frequency cutoff (100kHz in
this example) and the differential gain AVD, determines the
upper passband response limit. With AVD = 3 and fH =
100kHz, the closed-loop gain bandwidth product (GBWP) is
300kHz. This is less than the LM4854’s 3.5MHz GBWP. With
this margin, the amplifier can be used in designs that require
more differential gain while avoiding performance restricting
bandwidth limitations.
RECOMMENDED PRINTED CIRCUIT BOARD LAYOUT
Figures 5 through 9 show the recommended four-layer PC
board layout that is optimized for the micro SMD-packaged
LM4854 and associated external components. Figures 10
through 12 show the recommended two-layer PC board
layout that is optimized for the TSSOP-packaged LM4854
and associated external components. Figures 13 through 17
show the recommended four-layer PC board layout that is
optimized for the LLP-packaged LM4854 and associate ex-
ternal components.
These circuits are designed for use with an external 5V
supply and 8
(min) speakers.These circuit boards are easy
to use. Apply 5V and ground to the board’s V
DD and GND
pads, respectively. Connect a speaker between the board’s
L-OUT and BTL-OUT or headphones to the headphone jack
(L-OUT and R-OUT outputs).
Demonstration Board Layout
20038221
Figure 5. Recommended microSMD PC Board Layout:
Component-Side SilkScreen
20038222
Figure 6. Recommended microSMD PC Board Layout:
Component-Side Layout
20038223
Figure 7. Recommended microSMD PC Board Layout:
Upper Inner-Layer Layout
20038224
Figure 8. Recommended microSMD PC Board Layout:
Lower Inner-Layout Layer
LM4854
www.national.com
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PDF描述 |
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| LM4864LDX/NOPB | 0.725 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO10 |
| LM4867MTEX/NOPB | 3 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| LM4867MTX/NOPB | 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| LM4873MTE-1/NOPB | 3 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28 |
| LM4873MTE/NOPB | 2.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4854MT | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LM4854MT/NOPB | 功能描述:IC AMP AUDIO PWR 2.3W AB 14TSSOP 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(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) |
| LM4854MTX/NOPB | 功能描述:IC AMP AUDIO PWR 2.3W AB 14TSSOP 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(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) |
| LM4855 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System |
| LM48555 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Ceramic Speaker Driver |
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