LM4665ITLX

更新时间： 2024-11-05 22:51:51

品牌	Logo	应用领域
美国国家半导体 - NSC		商用集成电路音频放大器
页数	文件大小	规格书
18页	1014K
描述
Filterless High Efficiency 1W 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

LM4665ITLX 数据手册

December 2002

LM4665

Filterless High Efficiency 1W Switching Audio Amplifier

General Description

Key Specifications

The LM4665 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

LM4665 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 100mW into 8Ω transducer

75%(typ)

80%(typ)

3mA(typ)

Efficiency at 400mW into 8Ω transducer

Total quiescent power supply current (3V)

Total shutdown power supply current (3V) 0.01µA(typ)

Single supply range (MSOP & LD)

Single supply range (ITL) (Note 11)

2.7V to 5.5V

2.7V to 3.8V

The LM4665 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 400mW with

less than 2%THD+N.

Features

n No output filter required for inductive transducers

n Selectable gain of 6dB (2V/V) or 12dB (4V/V)

n Very fast turn on time: 5ms (typ)

n User selectable shutdown High or Low logic level

n Minimum external components

The LM4665 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 75%, reaching

80% at 400mW output power.

n "Click and pop" suppression circuitry

n Micro-power shutdown mode

n Short circuit protection

n micro SMD, LLP, and MSOP packages (no heat sink

required)

The LM4665 features a low-power consumption shutdown

mode. Shutdown may be enabled by either a logic high or

low depending on the mode selection. Connecting the Shut-

down Mode pin to either V_DD(high) or GND (low) enables

the Shutdown pin to be driven in a likewise manner to

activate shutdown.

Applications

n Mobile phones

n PDAs

The LM4665 has fixed selectable gain of either 6dB or 12dB.

The LM4665 has short circuit protection against a short from

the outputs to V_DD, GND or across the outputs.

n Portable electronic devices

Typical Application

20027001

FIGURE 1. Typical Audio Amplifier Application Circuit

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

DS200270

www.national.com

12 3 4 5 6 7...18

中文翻译

下载PDF

与LM4665ITLX相关器件

型号	品牌	获取价格	描述	数据表
LM4665ITLX/NOPB	NSC	获取价格	IC,AUDIO AMPLIFIER,SINGLE,BGA,9PIN,PLASTIC
LM4665ITLX/NOPB	TI	获取价格	IC,AUDIO AMPLIFIER,SINGLE,BGA,9PIN,PLASTIC
LM4665LD	NSC	获取价格	Filterless High Efficiency 1W Switching Audio Amplifier
LM4665LD	ROCHESTER	获取价格	NATIONALâS AUDIO AMPLIFIER now featuring Ro
LM4665LD/NOPB	TI	获取价格	1W, 1 CHANNEL, AUDIO AMPLIFIER, DSO10, LLP-10
LM4665LDX	ROCHESTER	获取价格	NATIONALâS AUDIO AMPLIFIER now featuring Ro
LM4665LDX/NOPB	TI	获取价格	IC,AUDIO AMPLIFIER,SINGLE,LLCC,10PIN,PLASTIC
LM4665LDX-G	ROCHESTER	获取价格	NATIONALâS AUDIO AMPLIFIER now featuring Ro
LM4665MM	ROCHESTER	获取价格	NATIONALâS AUDIO AMPLIFIER now featuring Ro
LM4665MM	NSC	获取价格	Filterless High Efficiency 1W Switching Audio Amplifier

与LM4665ITLX相关文章

英伟达新AI芯片Rubin或提前半年亮相
2024-11-05

14
苹果iPhone 17将全系采用三星/LG显示LTPO OLED面板
2024-11-05

12
三星深化印度制造布局，供应链本地化进程加速
2024-10-29

36
芯擎科技“星辰一号”自动驾驶芯片点亮成功，2025年量产在即
2024-10-29

33

产品中心

服务支持

精选活动

关于我们

帮助中心

LM4665ITLX

LM4665ITLX 数据手册

与LM4665ITLX相关器件

与LM4665ITLX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

LM4665ITLX

LM4665ITLX 数据手册

与LM4665ITLX相关器件

与LM4665ITLX相关文章

您还可以找

您在本页遇到什么问题？