Datasheet > LM4674

LM4674

更新时间： 2024-11-17 11:13:15

品牌	Logo	应用领域
德州仪器 - TI		放大器功率放大器
页数	文件大小	规格书
26页	1451K
描述
免滤波 2.5 立体声 D 类音频功率放大器

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LM4674 数据手册

LM4674

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SNAS344E –DECEMBER 2005–REVISED APRIL 2013

LM4674

Filterless 2.5W Stereo Class D Audio Power

Amplifier

Check for Samples: LM4674

FEATURES

DESCRIPTION

The LM4674 is a single supply, high efficiency,

2.5W/channel, filterless switching audio amplifier. A

low noise PWM architecture eliminates the output

filter, reducing external component count, board area

consumption, system cost, and simplifying design.

•

Output Short Circuit Protection

Stereo Class D Operation

No Output Filter Required

Logic Selectable Gain

•

Independent Shutdown Control

Minimum External Components

Click and Pop Suppression

Micro-Power Shutdown

The LM4674 is designed to meet the demands of

mobile phones and other portable communication

devices. Operating from a single 5V supply, the

device is capable of delivering 2.5W/channel of

continuous output power to a 4Ω load with less than

10% THD+N. Flexible power supply requirements

allow operation from 2.4V to 5.5V.

Available in Space-Saving 2mm x 2mm x

0.6mm DSBGA, and 4mm x 4mm x 0.8mm

WQFN Packages

The LM4674 features high efficiency compared to

conventional Class AB amplifiers. When driving an

8Ω speaker from a 3.6V supply, the device features

85% efficiency at P_O= 500mW. Four gain options are

pin selectable through the G0 and G1 pins.

APPLICATIONS

•

Mobile Phones

PDAs

Output short circuit protection prevents the device

from being damaged during fault conditions. Superior

click and pop suppression eliminates audible

transients on power-up/down and during shutdown.

Independent left/right shutdown control maximizes

power savings in mixed mono/stereo applications.

Laptops

KEY SPECIFICATIONS

•

Efficiency at 3.6V, 100mW into 8Ω: 80% (typ)

Efficiency at 3.6V, 500mW into 8Ω: 85% (typ)

Efficiency at 5V, 1W into 8Ω: 85% (typ)

Quiescent Power Supply Current

at 3.6V supply: 4mA

•

Power Output at V_DD= 5V,

R_L= 4Ω, THD ≤ 10%: 2.5 W (typ)

Shutdown Current: 0.03μA (typ)

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...26

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与LM4674相关器件

型号	品牌	获取价格	描述	数据表
LM4674A	NSC	获取价格	Filterless 2.5W Stereo Class D Audio Power Amplifier
LM4674A	TI	获取价格	免滤波 2.5 立体声 D 类音频功率放大器
LM4674ATL	NSC	获取价格	Filterless 2.5W Stereo Class D Audio Power Amplifier
LM4674ATL/NOPB	TI	获取价格	免滤波 2.5 立体声 D 类音频功率放大器 \| YZR \| 16 \| -40 to 85
LM4674ATLX/NOPB	NSC	获取价格	IC 2.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA16, 2 X 2 MM, 0.60 MM HEIGHT, ROHS COMPLIANT, BG
LM4674ATLX/NOPB	TI	获取价格	免滤波 2.5 立体声 D 类音频功率放大器 \| YZR \| 16 \| -40 to 85
LM4674SQ	NSC	获取价格	IC 2.5 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC16, 4 X 4 MM, 0.80 MM HEIGHT, LLP-16, Audio/Video
LM4674SQ/NOPB	TI	获取价格	免滤波 2.5 立体声 D 类音频功率放大器 \| RGH \| 16 \| -40 to 85
LM4674SQX	NSC	获取价格	IC 2.5 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC16, 4 X 4 MM, 0.80 MM HEIGHT, LLP-16, Audio/Video
LM4674SQX/NOPB	TI	获取价格	IC,AUDIO AMPLIFIER,DUAL,BGA,16PIN,PLASTIC

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