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參數(shù)資料
| 型號： | LM4854IBL |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.9W Monaural, 85mW Stereo Headphone Audio Amplifier |
| 中文描述： | 0.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA12 |
| 封裝： | MICRO, SMD-12 |
| 文件頁數(shù)： | 1/29頁 |
| 文件大?。?/td> | 1440K |
| 代理商： | LM4854IBL |
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LM4854
1.9W Monaural, 85mW Stereo Headphone Audio
Amplifier
General Description
The unity-gain stable LM4854 is both a mono differential
output (for bridge-tied loads, or BTL) audio power amplifier
and a single-ended (SE) stereo headphone amplifier. Oper-
ating on a single 5V supply, the mono BTL mode delivers
1.1W (typ) to an 8
load, 1.7W (typ) to a 4
load (Note 1) at
1% THD+N. In SE stereo mode, the amplifier will deliver
85mW to 32
loads. The LM4854 features a new circuit
topology that suppresses output transients (’click and pops’)
and eliminates SE-mode output coupling capacitors, saving
both component and board space costs. The LM4854 has
three inputs: one pair for a two-channel stereo signal and the
third for a single-channel mono input.
The LM4854 is designed for PDA, cellular telephone, note-
book, and other handheld portable applications. It delivers
high quality output power from a surface-mount package and
requires few external components. Other features include an
active-low micropower shutdown mode, an "instant-on" low
power standby mode, and thermal shutdown protection.
The LM4854 is available in the very space-efficient 12-lead
micro SMD, exposed-DAP LLP for higher power applica-
tions, and TSSOP packages.
Note 1:
An LM4854LD that has been properly mounted to a circuit board will
deliver 1.7W (typ) into a 4
load.
Key Specifications
j
LLP BTL output power (R
L
= 3.2
and
THD+N = 1%)
V
DD
= 3.0V
V
DD
= 5.0V
j
LLP BTL output power (R
L
= 4
and
THD+N = 1%)
V
DD
= 3.0V
V
DD
= 5.0V
j
LLP BTL output power (R
L
= 8
and
THD+N = 1%)
V
DD
= 3.0V
V
DD
= 5.0V
1.0W (typ)
1.9W (typ)
900mW (typ)
1.7W (typ)
380mW (typ)
1.1W (typ)
j
SE output power (R
L
= 32
and THD+N
= 1.0%)
V
DD
= 3.0V
V
DD
= 5.0V
j
Micropower shutdown supply current
V
DD
= 3.0V
V
DD
= 5.0V
j
Standby supply current
V
DD
= 3.0V
V
DD
= 5.0V
j
PSRR (f = 1kHz, 3.0V
≤
V
DD
≤
5.0V,
(Fig. 1))
BTL
SE
32mW (typ)
93mW (typ)
0.005μA (typ)
0.05μA (typ)
16μA (typ)
27μA (typ)
60dB (typ)
66dB (typ)
Features
n
Fast 0.1ms (typ) and 1.0ms (max) turn-on and turn-off
time
n
Eliminates SE amplifier output coupling capacitors
n
Advanced "click and pop" suppression circuitry
n
Stereo headphone amplifier mode
n
Low-power standby and ultra-low current micropower
shutdown modes
n
Thermal shutdown protection circuitry
n
2.4V to 5.5V operation
n
Unity-gain stable
n
Gain set with external resistors
n
Space-saving micro SMD package, exposed-DAP LLP,
and TSSOP
Applications
n
PDAs
n
Notebook computers
n
Cellular phones
n
Handheld portable electronic devices
Boomer
is a registered trademark of National Semiconductor Corporation.
April 2003
L
2003 National Semiconductor Corporation
DS200382
www.national.com
相關(guān)PDF資料 |
PDF描述 |
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| LM4854 | 1.9W Monaural, 85mW Stereo Headphone Audio Amplifier |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4854IBL/NOPB | 功能描述:IC AMP AUDIO PWR 2.3W AB 12USMD 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) |
| LM4854LD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AUDIO AMPLIFIER|DUAL|LLCC|14PIN|CERAMIC |
| LM4854LD/NOPB | 功能描述:IC AMP AUDIO PWR 2.3W MONO 14LLP 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) |
| LM4854MM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AUDIO AMPLIFIER|DUAL|TSSOP|10PIN|PLASTIC |
| LM4854MT | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
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