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| 型号： | LM4910 |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | Output Capacitor-less Stereo 35mW Headphone Amplifier |
| 中文描述： | 输出电容器的立体声耳机放大器为35mW |
| 文件页数： | 1/22页 |
| 文件大小： | 828K |
| 代理商： | LM4910 |
LM4910
Output Capacitor-less Stereo 35mW Headphone
Amplifier
General Description
The LM4910 is an audio power amplifier primarily designed
for headphone applications in portable device applications. It
is capable of delivering 35mW of continuous average power
toa32
load with less than 1% distortion (THD+N) from a
3.3V
DC power supply.
The LM4910 utilizes a new circuit topology that eliminates
output coupling capacitors and half-supply bypass capaci-
tors (patent pending). The LM4910 contains advanced pop &
click circuitry which eliminates noises caused by transients
that would otherwise occur during turn-on and turn-off.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. Since the LM4910 does not require
any output coupling capacitors, half-supply bypass capaci-
tors, or bootstrap capacitors, it is ideally suited for low-power
portable applications where minimal space and power con-
sumption are primary requirements.
The LM4910 features a low-power consumption shutdown
mode, activated by driving the shutdown pin with logic low.
Additionally, the LM4910 features an internal thermal shut-
down protection mechanism. The LM4910 is also unity-gain
stable and can be configured by external gain-setting resis-
tors.
Key Specifications
n
PSRR at f = 217Hz
65dB (typ)
n
Power Output at V
DD = 3.3V, RL =32
, and THD ≤
1%
35mW (typ)
n
Shutdown Current
0.1A (typ)
Features
n
Eliminates headphone amplifier output coupling
capacitors (patent pending)
n
Eliminates half-supply bypass capacitor (patent pending)
n
Advanced pop & click circuitry eliminates noises during
turn-on and turn-off
n
Ultra-low current shutdown mode
n
Unity-gain stable
n
2.2V - 5.5V operation
n
Available in space-saving MSOP, LLP, and SOIC
packages
Applications
n
Mobile Phones
n
PDAs
n
Portable eletronics devices
n
Portable MP3 players
Typical Application
Boomer is a registered trademark of National Semiconductor Corporation.
20030565
FIGURE 1. Typical Audio Amplifier Application Circuit
February 2003
LM4910
Output
Capacitor-less
Stereo
35mW
Headphone
Amplifier
2003 National Semiconductor Corporation
DS200305
www.national.com
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相关代理商/技术参数 |
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|---|---|
| LM49100 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Mono Class AB Audio Sub-System with a True-Ground Headphone Amplifier |
| LM49100_0709 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Mono Class AB Audio Sub-System with a True-Ground Headphone Amplifier |
| LM49100GR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:AUDIO SUBSYSTEM SMD MICROARRAY25 |
| LM49100GR/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 |
| LM49100GREVAL | 功能描述:音频 IC 开发工具 LM49100GR EVAL BOARD RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
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