- 您现在的位置：买卖IC网 > PDF目录30751 > LM4671ITLX/NOPB (NATIONAL SEMICONDUCTOR CORP) 2.5 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 PDF资料下载
参数资料
| 型号： | LM4671ITLX/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 2.5 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| 封装： | MICRO, SMD-9 |
| 文件页数： | 1/10页 |
| 文件大小： | 589K |
| 代理商： | LM4671ITLX/NOPB |
March 3, 2008
LM4671
Filterless High Efficiency 2.5W Switching Audio Amplifier
General Description
The LM4671 is a single supply, high efficiency 2.5W switching
audio amplifier. A low noise, filterless PWM architecture elim-
inates the output filter, reducing external component count,
board area consumption, system cost, and simplifying design.
The LM4671 is designed to meet the demands of mobile
phones and other portable communication devices. Operat-
ing on a single 5V supply, it is capable of driving a 4
speaker
load at a continuous average output of 2.1W with less than
1% THD+N. Its flexible power supply requirements allow op-
eration from 2.4V to 5.5V.
The LM4671 has high efficiency with speaker loads compared
to a typical Class AB amplifier. With a 3V supply driving an
8
speaker, the IC's efficiency for a 100mW power level is
80%, reaching 88% at 400mW output power.
The LM4671 features a low-power consumption shutdown
mode. Shutdown may be enabled by driving the Shutdown
pin to a logic low (GND).
The gain of the LM4671 is externally configurable which al-
lows independent gain control from multiple sources by sum-
ming the signals.
Key Specifications
■Efficiency @ 3.6V, 100mW into
8 speaker
80% (typ)
■Efficiency @ 3.6V, 400mW into
8 speaker
88% (typ)
■Efficiency @ 5V, 1W into 8
speaker
86% (typ)
■Quiescent current, 3.6V supply
2.8mA (typ)
■Total shutdown power supply
current
0.01A (typ)
■Single supply range
2.4V to 5.5V
Features
■ No output filter required for inductive loads
■ Externally configurable gain
■ Very fast turn on time: 17μs (typ)
■ Minimum external components
■ "Click and pop" suppression circuitry
■ Micro-power shutdown mode
■ Available in space-saving microSMD package
Applications
■ Mobile phones
■ PDAs
■ Portable electronic devices
Typical Application
201073j3
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer is a registered trademark of National Semiconductor Corporation.
2008 National Semiconductor Corporation
201073
www.national.com
LM4671
Filterless
High
Efficiency
2.5W
Switching
Audio
Amplifier
相关PDF资料 |
PDF描述 |
|---|---|
| LM4680SD/NOPB | 10 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO14 |
| LM4700DWF | 30 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4700MWC | 30 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4700T | 30 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM11 |
| LM4700TF/NOPB | 30 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM11 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4673 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Filterless, 2.65W, Mono, Class D Audio Power Amplifier |
| LM4673_07 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Filterless, 2.65W, Mono, Class D Audio Power Amplifier |
| LM4673SD | 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 |
| LM4673SD/NOPB | 功能描述:音频放大器 FILTERLES,2.65W,MONO CLASS D AUD PWR AMP 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 |
| LM4673SDBD | 功能描述:音频 IC 开发工具 LM4673SD 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 |
发布紧急采购，3分钟左右您将得到回复。