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参数资料
| 型号： | LM4854LD/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO14 |
| 封装： | LLP-14 |
| 文件页数： | 1/29页 |
| 文件大小： | 1440K |
| 代理商： | LM4854LD/NOPB |
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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 (RL = 3.2
and
THD+N = 1%)
V
DD = 3.0V
1.0W (typ)
V
DD = 5.0V
1.9W (typ)
j LLP BTL output power (RL =4
and
THD+N = 1%)
V
DD = 3.0V
900mW (typ)
V
DD = 5.0V
1.7W (typ)
j LLP BTL output power (RL =8
and
THD+N = 1%)
V
DD = 3.0V
380mW (typ)
V
DD = 5.0V
1.1W (typ)
j SE output power (RL =32
and THD+N
= 1.0%)
V
DD = 3.0V
32mW (typ)
V
DD = 5.0V
93mW (typ)
j Micropower shutdown supply current
V
DD = 3.0V
0.005A (typ)
V
DD = 5.0V
0.05A (typ)
j Standby supply current
V
DD = 3.0V
16A (typ)
V
DD = 5.0V
27A (typ)
j PSRR (f = 1kHz, 3.0V
≤ V
DD
≤ 5.0V,
(Fig. 1))
BTL
60dB (typ)
SE
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
LM4854
1.9W
Monaural,
85mW
Stereo
Headphone
Audio
Amplifier
2003 National Semiconductor Corporation
DS200382
www.national.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4854MM | 制造商:未知厂家 制造商全称:未知厂家 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: |
| LM4854MT/NOPB | 功能描述:IC AMP AUDIO PWR 2.3W AB 14TSSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| LM4854MTX/NOPB | 功能描述:IC AMP AUDIO PWR 2.3W AB 14TSSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| LM4855 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System |
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