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参数资料
| 型号： | LM4911LD/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.145 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO10 |
| 封装： | LLP-10 |
| 文件页数： | 1/10页 |
| 文件大小： | 621K |
| 代理商： | LM4911LD/NOPB |
July 30, 2008
LM4911
Stereo 40mW Low Noise Headphone Amplifier with
Selectable Capacitive Coupled or OCL Output
General Description
The LM4911 is an stereo audio power amplifier capable of
delivering 40mW per channel of continuous average power
into a 16
load or 25mW per channel into a 32 load at 1%
THD+N from a 3V power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. Since the LM4911 does not require
bootstrap capacitors or snubber networks, it is optimally suit-
ed for low-power portable systems. In addition, the LM4911
may be configured for either single-ended capacitively cou-
pled outputs or for OCL outputs (patent pending).
The LM4911 features a low-power consumption shutdown
mode and a power mute mode that allows for faster turn on
time with less than 1mV voltage change at outputs on release.
Additionally, the LM4911 features an internal thermal shut-
down protection mechanism.
The LM4911 is unity gain stable and may be configured with
external gain-setting resistors.
Key Specifications
■ PSRR at 217Hz and 1kHz
65dB (typ)
■ Output Power at 1kHz with V
DD = 2.4V, 1% THD
+N into a 16
load
25mW
(typ)
■ Output Power at 1kHz with V
DD = 3V, 1% THD
+N into a 16
load
40mW
(typ)
■ Shutdown Current
2.0A (max)
■ Output Voltage change on release from Shutdown
V
DD = 2.4V, RL = 16 (C-Coupled)
1mV
(max)
■ Mute Current
100A (max)
Features
■ OCL or capacitively coupled outputs (patent pending)
■ External gain-setting capability
■ Available in space-saving MSOP and LD packages
■ Ultra low current shutdown mode
■ Mute mode allows fast turn-on (1ms) with less than 1mV
change on outputs
■ 2V - 5.5V operation
■ Ultra low noise
Applications
■ Portable CD players
■ PDAs
■ Portable electronics devices
Block Diagram
20031478
FIGURE 1. Block Diagram
Boomer is a registered trademark of National Semiconductor Corporation.
2008 National Semiconductor Corporation
200314
www.national.com
LM4911
Stereo
40mW
Low
Noise
Headphone
Amplifier
with
Selectable
Capacitive
Coupled
or
OCL
Output
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4911LDX | 功能描述:IC AMP AUDIO PWR .145W AB 10LLP 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) |
| LM4911MM | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LM4911MM/NOPB | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LM4911MMX | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LM4911MMX/NOPB | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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