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参数资料
| 型号： | LM4900LDX/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.675 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封装： | LLP-8 |
| 文件页数： | 1/19页 |
| 文件大小： | 772K |
| 代理商： | LM4900LDX/NOPB |
LM4900
265mW at 3.3V Supply Audio Power Amplifier with
Shutdown Mode
General Description
The LM4900 is a bridged audio power amplifier capable of
delivering 265mW of continuous average power into an 8
load with 1% THD+N from a 3.3V power supply.
Boomer audio power amplifiers were designed specifically
to provide high quality output power from a low supply volt-
age while requiring a minimal amount of external compo-
nents. Since the LM4900 does not require output coupling
capacitors, bootstrap capacitors or snubber networks, it is
optimally suited for low-power portable applications.
The LM4900 features an externally controlled, low power
consumption shutdown mode, and thermal shutdown protec-
tion.
The closed loop response of the unity-gain stable LM4900
can be configured by external gain-setting resistors.
Key Specifications
j THD+N at 1kHz for 265mW continuous
average output power into 8
,
V
DD = 3.3V
1.0% (max)
j THD+N at 1kHz for 675mW continuous
average output power into 8
,
V
DD = 5V
1.0% (max)
j Shutdown current
0.1A (typ)
Features
n
MSOP, LLP, and SOP packaging
n
No output coupling capacitors, bootstrap capacitors, or
snubber circuits are necessary
n
Thermal shutdown protection circuitry
n
Unity-gain stable
n
External gain configuration capability
n
Latest generation ’click and pop’ suppression circuitry
Applications
n
Cellular phones
n
PDA’s
n
Any portable audio application
Typical Application
Boomer is a registered trademark of National Semiconductor Corporation.
DS200064-1
FIGURE 1. Typical Audio Amplifier Application Circuit
September 2001
LM4900
265mW
at
3.3V
Supply
Audio
Power
Amplifier
with
Shutdown
Mode
2001 National Semiconductor Corporation
DS200064
www.national.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4900M | 制造商:Texas Instruments 功能描述:AMP AUDIO 265MW@3.3V SMD SOIC8 |
| LM4900M/NOPB | 功能描述:IC AMP AUDIO PWR .675W AB 8SOIC 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) |
| LM4900MM | 制造商:Texas Instruments 功能描述:AMP AUDIO CELLULAR SMD LLP-16 |
| LM4900MM/NOPB | 功能描述:IC AMP AUDIO PWR .675W AB 8MSOP RoHS:否 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) |
| LM4900MMBD | 功能描述:BOARD EVALUATION LM4900MM RoHS:否 类别:编程器，开发系统 >> 评估板 - 音频放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
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