Datasheet > LM4673

LM4673

更新时间： 2024-11-24 11:12:15

品牌	Logo	应用领域
德州仪器 - TI		放大器
页数	文件大小	规格书
30页	4643K
描述
2.65W 单声道、模拟输入 D 类扬声器放大器

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LM4673 数据手册

LM4673, LM4673SDBD, LM4673TMBD

www.ti.com

SNAS317D –DECEMBER 2005–REVISED MAY 2013

LM4673

Filterless, 2.65W, Mono, Class D Audio Power

Amplifier

Check for Samples: LM4673, LM4673SDBD, LM4673TMBD

FEATURES

DESCRIPTION

The LM4673 is a single supply, high efficiency,

2.65W, mono, Class D audio amplifier. A low noise,

filterless PWM architecture eliminates the output filter,

reducing external component count, board area

consumption, system cost, and simplifying design.

•

Mono Class D Operation

•

No Output Filter Required for Inductive Loads

Externally Configurable Gain

Very Fast Turn On Time: 17μs (typ)

Minimum External Components

"Click and Pop" Suppression Circuitry

Micro-Power Shutdown Mode

The LM4673 is designed to meet the demands of

mobile phones and other portable communication

devices. Operating 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 operation

from 2.4V to 5.5V.

Available in Space-Saving 0.4mm Pitch

DSBGA and WSON Packages

APPLICATIONS

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.

•

Mobile Phones

PDAs

Portable Electronic Devices

The LM4673 features a low-power consumption

shutdown mode. Shutdown may be enabled by

driving the Shutdown pin to a logic low (GND).

KEY SPECIFICATIONS

•

Efficiency at 3.6V, 400mW into 8Ω Speaker

88% (typ)

The gain of the LM4673 is externally configurable

which allows independent gain control from multiple

sources by summing the signals. Output short circuit

and thermal overload protection prevent the device

from damage during fault conditions.

•

Efficiency at 3.6V, 100mW into 8Ω Speaker

80% (typ)

•

Efficiency at 5V, 1W into 8Ω Speaker 86% (typ)

Quiescent Current, 3.6V Supply 2.1mA (typ)

Total Shutdown Power Supply Current

0.01µA (typ)

•

Single Supply Range 2.4V to 5.5V

PSRR, f = 217Hz 78dB

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...30

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与LM4673相关器件

型号	品牌	获取价格	描述	数据表
LM4673_07	NSC	获取价格	Filterless, 2.65W, Mono, Class D Audio Power Amplifier
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

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