Datasheet > LM4941

LM4941

更新时间： 2024-11-21 04:20:07

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器射频功率放大器
页数	文件大小	规格书
13页	715K
描述
1.25 Watt Fully Differential Audio Power Amplifier With RF Suppression and Shutdown

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM4941 数据手册

June 2006

LM4941

1.25 Watt Fully Differential Audio Power Amplifier With

RF Suppression and Shutdown

General Description

Key Specifications

The LM4941 is a fully differential audio power amplifier

primarily designed for demanding applications in mobile

phones and other portable communication device applica-

tions. It is capable of delivering 1.25 watts of continuous

average power to a 8Ω load with less than 1% distortion

(THD+N) from a 5V_DCpower supply. The LM4941 does not

require output coupling capacitors or bootstrap capacitors,

and therefore is ideally suited for mobile phone and other low

voltage applications where minimal power consumption is a

primary requirement.

Improved PSRR at 217Hz

95dB (typ)

1.25W (typ)

550mW (typ)

0.1µA (typ)

Power Output at 5.0V 1% THD (8Ω)

Power Output at 3.3V 1% THD

Shutdown Current

Features

n Improved RF suppression, by up to 20dB over previous

designs in selected applications

The LM4941 also features proprietary internal circuitry that

suppresses the coupling of RF signals into the chip. This is

important because certain types of RF signals (such as

GSM) can couple into audio amplifiers in such a way that

part of the signal is heard through the speaker. The RF

suppression circuitry in the LM4941 makes it well-suited for

portable applications in which strong RF signals generated

by an antenna from or a cellular phone or other portable

electronic device may couple audibly into the amplifier.

n Fully differential amplification

n Available in space-saving micro SMD package

n Ultra low current shutdown mode

n Can drive capacitive loads up to 100pF

n Improved pop & click circuitry eliminates noises during

turn-on and turn-off transitions

n 2.4 - 5.5V operation

n No output coupling capacitors, snubber networks or

bootstrap capacitors required

Other features include a low-power consumption shutdown

mode, internal thermal shutdown protection, and advanced

pop & click circuitry.

Applications

n Mobile phones

n PDAs

n Portable electronic devices

Typical Application

20170303

FIGURE 1. Typical Audio Amplifier Application Circuit

Boomer^®is a registered trademark of National Semiconductor Corporation.

DS201703

www.national.com

12 3 4 5 6 7...13

中文翻译

下载PDF

与LM4941相关器件

型号	品牌	获取价格	描述	数据表
LM4941_07	NSC	获取价格	1.25 Watt Fully Differential Audio Power Amplifier With RF Suppression and Shutdown
LM4941SD	NSC	获取价格	1.25 Watt Fully Differential Audio Power Amplifier With RF Suppression and Shutdown
LM4941TM	NSC	获取价格	1.25 Watt Fully Differential Audio Power Amplifier With RF Suppression and Shutdown
LM4941TMX	NSC	获取价格	IC 1.54 W, 1 CHANNEL, AUDIO AMPLIFIER, BGA9, MICRO, BGA-9, Audio/Video Amplifier
LM49450	NSC	获取价格	I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Referenced
LM49450	TI	获取价格	Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Ref
LM49450_15	TI	获取价格	Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Ref
LM49450SQ	NSC	获取价格	IC 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC32, 5 X 5 MM, 0.80 MM HEIGHT, LLP-32, Audio/Video
LM49450SQ/NOPB	TI	获取价格	Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Ref
LM49450SQX	TI	获取价格	IC,AUDIO AMPLIFIER,DUAL,LLCC,28PIN,PLASTIC

与LM4941相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

28
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

21
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

50
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

48

产品中心

服务支持

精选活动

关于我们

帮助中心

LM4941

LM4941 数据手册

与LM4941相关器件

与LM4941相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LM4941

LM4941 数据手册

与LM4941相关器件

与LM4941相关文章

您还可以找

您在本页遇到什么问题？