Datasheet > LM4666

LM4666

更新时间： 2024-11-25 22:51:51

品牌	Logo	应用领域
美国国家半导体 - NSC		开关音频放大器
页数	文件大小	规格书
15页	639K
描述
Filterless High Efficiency Stereo 1.2W Switching Audio 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

LM4666 数据手册

May 2004

LM4666

Filterless High Efficiency Stereo 1.2W Switching Audio

Amplifier

General Description

Key Specifications

The LM4666 is a fully integrated single-supply high efficiency

switching audio amplifier. It features an innovative modulator

that eliminates the LC output filter used with typical switching

amplifiers. Eliminating the output filter reduces parts count,

simplifies circuit design, and reduces board area. The

LM4666 processes analog inputs with a delta-sigma modu-

lation technique that lowers output noise and THD when

compared to conventional pulse width modulators.

Efficiency at 3V, 100mW into 8Ω transducer 79% (typ)

Efficiency at 3V, 450mW into 8Ω transducer 84% (typ)

Efficiency at 5V, 1W into 8Ω transducer

Total quiescent power supply current

Total shutdown power supply current

Single supply range

85% (typ)

7.0mA (typ)

0.02µA (typ)

2.8V to 5.5V

The LM4666 is designed to meet the demands of mobile

phones and other portable communication devices. Operat-

ing on a single 3V supply, it is capable of driving 8Ω trans-

ducer loads at a continuous average output of 450mW with

less than 1%THD+N. Its flexible power supply requirements

allow operation from 2.8V to 5.5V.

Features

n No output filter required for inductive transducers

n Selectable gain of 6dB or 12dB

n Very fast turn on time: 6ms (typ)

n Minimum external components

n "Click and pop" suppression circuitry

n Micro-power shutdown mode

The LM4666 has high efficiency with an 8Ω transducer load

compared to a typical Class AB amplifier. With a 3V supply,

the IC’s efficiency for a 100mW power level is 79%, reaching

84% at 450mW output power.

n Short circuit protection

The LM4666 features a low-power consumption shutdown

mode. Shutdown may be enabled by driving the Shutdown

pin to a logic low (GND).

n Available in space-saving SDA package

Applications

n Mobile phones

n PDAs

The LM4666 has fixed selectable gain of either 6dB or 12dB.

The LM4666 has short circuit protection against a short from

the outputs to V_DDor GND.

n Portable electronic devices

Typical Application

200558E6

FIGURE 1. Typical Audio Amplifier Application Circuit

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

DS200558

www.national.com

12 3 4 5 6 7...15

中文翻译

下载PDF

与LM4666相关器件

型号	品牌	获取价格	描述	数据表
LM4666_15	TI	获取价格	Filterless High Efficiency Stereo 1.2W Switching
LM4666SD	NSC	获取价格	Filterless High Efficiency Stereo 1.2W Switching Audio Amplifier
LM4666SD/NOPB	TI	获取价格	Filterless High Efficiency Stereo 1.2W Switching
LM4666SDA	NSC	获取价格	Filterless High Efficiency Stereo 1.2W Switching Audio Amplifier
LM4666SDBD	TI	获取价格	Filterless High Efficiency Stereo 1.2W Switching
LM4666SDX	NSC	获取价格	IC 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO14, LLP-14, Audio/Video Amplifier
LM4666SDX/NOPB	TI	获取价格	AUDIO AMPLIFIER
LM4667	NSC	获取价格	Filterless High Efficiency 1.3W Switching Audio Amplifier
LM4667	TI	获取价格	无线设备的音频解决方案
LM4667ITL	NSC	获取价格	Filterless High Efficiency 1.3W Switching Audio Amplifier

与LM4666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

45
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

34
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

62
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

59

产品中心

服务支持

精选活动

关于我们

帮助中心

LM4666

LM4666 数据手册

与LM4666相关器件

与LM4666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

LM4666

LM4666 数据手册

与LM4666相关器件

与LM4666相关文章

您还可以找

您在本页遇到什么问题？