Datasheet > LM4673_07

LM4673_07

更新时间： 2024-11-23 04:20:07

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器功率放大器
页数	文件大小	规格书
24页	9135K
描述
Filterless, 2.65W, Mono, Class D Audio Power Amplifier

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

LM4673_07 数据手册

November 1, 2007

LM4673ꢀ

Filterless, 2.65W, Mono, Class D Audio Power Amplifier

General Description

Key Specifications

The LM4673 is a single supply, high efficiency, 2.65W, mono,

Class D audio amplifier. A low noise, filterless PWM architec-

ture eliminates the output filter, reducing external component

count, board area consumption, system cost, and simplifying

design.

■ꢀ

Efficiency at 3.6V, 400mW into 8Ω speaker

88% (typ)

80% (typ)

■ꢀ

Efficiency at 3.6V, 100mW into 8Ω speaker

The LM4673 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 4Ω 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.

■ꢀ

Efficiency at 5V, 1W into 8Ω speaker

86% (typ)

■ꢀQuiescent current, 3.6V supply

2.1mA (typ)

■ꢀ

0.01µA (typ)

Total shutdown power supply current

The LM4673 has high efficiency with speaker loads compared

to a typical Class AB amplifier. With a 3.6V supply driving an

8Ω speaker, the IC's efficiency for a 100mW power level is

80%, reaching 88% at 400mW output power.

2.4V to 5.5V

78dB

■ꢀSingle supply range

■ꢀPSRR, f = 217Hz

The LM4673 features a low-power consumption shutdown

mode. Shutdown may be enabled by driving the Shutdown

pin to a logic low (GND).

Features

Mono Class D Operation

■

No output filter required for inductive loads

The gain of the LM4673 is externally configurable which al-

lows independent gain control from multiple sources by sum-

ming the signals. Output short circuit and thermal overload

protection prevent the device from damage during fault con-

ditions.

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 0.4mm pitch micro SMD and

LLP^Tmpackages

Applications

Mobile phones

■

PDAs

Portable electronic devices

Boomer® is a registered trademark of National Semiconductor Corporation.

201522

www.national.com

12 3 4 5 6 7...24

中文翻译

下载PDF

与LM4673_07相关器件

型号	品牌	获取价格	描述	数据表
LM4673SD	NSC	获取价格	Filterless, 2.65W, Mono, Class D Audio Power Amplifier
LM4673SD/NOPB	TI	获取价格	2.65W 单声道、模拟输入 D 类扬声器放大器 \| NGQ \| 8 \| -40 to 8
LM4673SDX	NSC	获取价格	IC 2.65 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8, LLP-8, Audio/Video Amplifier
LM4673TM	NSC	获取价格	Filterless, 2.65W, Mono, Class D Audio Power Amplifier
LM4673TM/NOPB	TI	获取价格	2.65W 单声道、模拟输入 D 类扬声器放大器 \| YFQ \| 9 \| -40 to 8
LM4673TMX	NSC	获取价格	暂无描述
LM4673TMX/NOPB	TI	获取价格	2.65W 单声道、模拟输入 D 类扬声器放大器 \| YFQ \| 9 \| -40 to 8
LM4674	NSC	获取价格	Filterless 2.5W Stereo Class D Audio Power Amplifier
LM4674	TI	获取价格	免滤波 2.5 立体声 D 类音频功率放大器
LM4674A	NSC	获取价格	Filterless 2.5W Stereo Class D Audio Power Amplifier

与LM4673_07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

36
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

28
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

56
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

53

产品中心

服务支持

精选活动

关于我们

帮助中心

LM4673_07

LM4673_07 数据手册

与LM4673_07相关器件

与LM4673_07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

LM4673_07

LM4673_07 数据手册

与LM4673_07相关器件

与LM4673_07相关文章

您还可以找

您在本页遇到什么问题？