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| 型号： | LM4674SQBD |
| 厂商： | National Semiconductor |
| 文件页数： | 1/27页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION LM4674SQ |
| 产品培训模块： | PowerWise® Products and Technology |
| 标准包装： | 1 |
| 系列： | Boomer® |
| 放大器类型： | D 类 |
| 输出类型： | 2 通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 2.5W x 2 @ 4 欧姆 |
| 电源电压： | 2.4 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 板类型： | 完全填充 |
| 已用 IC / 零件： | LM4674 |
| 已供物品： | 板 |
| 相关产品： | LM4674SQX-ND - IC AMP AUDIO PWR 2.5W STER 16LLP LM4674SQ/NOPBDKR-ND - IC AMP AUDIO PWR 2.5W STER 16LLP LM4674SQ/NOPBCT-ND - IC AMP AUDIO PWR 2.5W STER 16LLP LM4674SQ/NOPBTR-ND - IC AMP AUDIO PWR 2.5W STER 16LLP |
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SNAS344E – DECEMBER 2005 – REVISED APRIL 2013
LM4674
Filterless 2.5W Stereo Class D Audio Power
Amplifier
Check for Samples: LM4674
1
FEATURES
DESCRIPTION
The LM4674 is a single supply, high efficiency,
2
Output Short Circuit Protection
2.5W/channel, filterless switching audio amplifier. A
Stereo Class D Operation
low noise PWM architecture eliminates the output
No Output Filter Required
filter, reducing external component count, board area
consumption, system cost, and simplifying design.
Logic Selectable Gain
Independent Shutdown Control
The LM4674 is designed to meet the demands of
mobile phones and other portable communication
Minimum External Components
devices. Operating from a single 5V supply, the
Click and Pop Suppression
device is capable of delivering 2.5W/channel of
Micro-Power Shutdown
continuous output power to a 4
load with less than
10% THD+N. Flexible power supply requirements
Available in Space-Saving 2mm x 2mm x
allow operation from 2.4V to 5.5V.
0.6mm DSBGA, and 4mm x 4mm x 0.8mm
WQFN Packages
The LM4674 features high efficiency compared to
conventional Class AB amplifiers. When driving an
APPLICATIONS
8
speaker from a 3.6V supply, the device features
85% efficiency at PO = 500mW. Four gain options are
Mobile Phones
pin selectable through the G0 and G1 pins.
PDAs
Output short circuit protection prevents the device
Laptops
from being damaged during fault conditions. Superior
click
and
pop
suppression
eliminates
audible
KEY SPECIFICATIONS
transients on power-up/down and during shutdown.
Independent left/right shutdown control maximizes
Efficiency at 3.6V, 100mW into 8
: 80% (typ)
power savings in mixed mono/stereo applications.
Efficiency at 3.6V, 500mW into 8
: 85% (typ)
Efficiency at 5V, 1W into 8
: 85% (typ)
Quiescent Power Supply Current
at 3.6V supply: 4mA
Power Output at VDD = 5V,
RL = 4, THD ≤ 10%: 2.5 W (typ)
Shutdown Current: 0.03
μA (typ)
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright 2005–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4674SQX/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 |
| LM4674TL | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Filterless 2.5W Stereo Class D Audio Power Amplifier |
| LM4674TL/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 |
| LM4674TLBD | 功能描述:音频 IC 开发工具 LM4674 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 |
| LM4674TLX | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
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