Datasheet > LM4941

LM4941

更新时间： 2024-02-01 09:49:39

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

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LM4941 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	BGA	包装说明：	VFBGA,
针数：	9	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.33.00.01
风险等级：	5.35	标称带宽：	20 kHz
商用集成电路类型：	AUDIO AMPLIFIER	JESD-30 代码：	S-XBGA-B9
JESD-609代码：	e1	长度：	1.25 mm
湿度敏感等级：	1	信道数量：	1
功能数量：	1	端子数量：	9
最高工作温度：	85 °C	最低工作温度：	-40 °C
标称输出功率：	1.54 W	封装主体材料：	UNSPECIFIED
封装代码：	VFBGA	封装形状：	SQUARE
封装形式：	GRID ARRAY, VERY THIN PROFILE, FINE PITCH	认证状态：	Not Qualified
座面最大高度：	0.6 mm	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	2.4 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Tin/Silver/Copper (Sn/Ag/Cu)
端子形式：	BALL	端子节距：	0.4 mm
端子位置：	BOTTOM	宽度：	1.25 mm

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

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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

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