Datasheet > LM49450

LM49450

更新时间： 2024-01-24 07:00:57

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
42页	1037K
描述
Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Referenced Headphone Amplifier, 3D Enhancement, and Headphone Sense

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

LM49450 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	HVQCCN, LCC28,.2SQ,20
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	8 weeks
风险等级：	5.48	商用集成电路类型：	AUDIO AMPLIFIER
JESD-30 代码：	S-PQCC-N32	JESD-609代码：	e3
长度：	5 mm	湿度敏感等级：	1
功能数量：	2	端子数量：	28
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	HVQCCN
封装等效代码：	LCC28,.2SQ,20	封装形状：	SQUARE
封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
电源：	3.6/5 V	认证状态：	Not Qualified
筛选级别：	AEC-Q100	座面最大高度：	0.8 mm
子类别：	Audio/Video Amplifiers	最大供电电压 (Vsup)：	5.5 V
表面贴装：	YES	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	NO LEAD
端子节距：	0.5 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	5 mm
Base Number Matches：	1

LM49450 数据手册

LM49450

www.ti.com

SNAS440D –FEBRUARY 2008–REVISED MAY 2013

LM49450 Boomer ™ I²S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-

System with Ground Referenced Headphone Amplifier, 3D Enhancement, and Headphone

Sense

Check for Samples: LM49450

FEATURES

KEY SPECIFICATIONS

•

24–Bit Stereo DAC

•

SNR at Headphone Output: 102dBA (typ)

•

Stereo Filterless Class D Operation

Speaker Amplifier Efficiency at 3.6V,

650mW/Channel into 8Ω: 87% (typ)

Selectable Spread Spectrum Mode Reduces

EMI

•

Speaker Amplifier Efficiency at 5V,

1.1W/Channel into 8Ω: 80% (typ)

•

Ground Referenced Headphone Amplifiers

with 100dB SNR

Quiescent Power Supply Current Line Inputs:

•

I²S Compatible Audio Interface

Audio Sample Rates up to 192kHz

TI’s 3D Enhancement

–

Speaker Mode at LSVDD = 3.6V: 7.5mA

(typ)

–

Headphone Mode at HPVDD = 2.5V: 5.3mA

(typ)

32-Step Digital Volume Control

I²C-Compatible Control Interface

Headphone Sense Input

•

Output Power/Channel Speaker at LSV_DD= 5V:

–

R_L= 4Ω, THD+N ≤ 10%: 2.5W (typ)

R_L= 8Ω, THD+N ≤ 1%: 1.25W (typ)

Stereo Analog Line Inputs

Output Short Circuit Protection

Thermal Overload Protection

Minimum External Components

Click and Pop Suppression

Micro-Power Shutdown

Headphone at HPV_DD= 2.5V:

–

R_L= 16Ω, THD+N ≤ 1%: 34mW (typ)

R_L= 32Ω, THD+N ≤ 1%: 36mW (typ)

PSRR at 1kHz

–

Speaker Mode: 67dB ( typ)

Headphone Mode: 77dB (typ)

Available in Space-Saving 32-Pin WQFN

Package

Shutdown current: 0.02μA (typ)

DESCRIPTION

APPLICATIONS

The LM49450 is a fully integrated audio subsystem

designed for portable media player applications. The

LM49450 combines a 24-bit I²S digital-to-analog

•

Portable Media Players

Portable Navigation Devices

Multi-Media Monitors

Laptops

converter (DAC), 2.5W/channel stereo Class

speaker drivers, 36mW stereo ground referenced

headphone drivers, volume control, and TI’s unique

3D sound enhancement into a single device.

Portable Gaming Devices

Mobile Handsets

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.

is a trademark of ~ Texas Instruments.

All other 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...42

下载PDF

与LM49450相关器件

型号	品牌	描述	获取价格	数据表
LM49450_15	TI	Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Ref	获取价格
LM49450SQ	NSC	IC 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC32, 5 X 5 MM, 0.80 MM HEIGHT, LLP-32, Audio/Video	获取价格
LM49450SQ/NOPB	TI	Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Ref	获取价格
LM49450SQX	TI	IC,AUDIO AMPLIFIER,DUAL,LLCC,28PIN,PLASTIC	获取价格
LM49450SQX/NOPB	TI	Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Ref	获取价格
LM4946	NSC	Output Capacitor-Less Audio Subsystem with Programmable National 3D	获取价格

产品中心

服务支持

精选活动

关于我们

帮助中心

LM49450

LM49450 技术参数

LM49450 数据手册

与LM49450相关器件

与LM49450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

LM49450

LM49450 技术参数

LM49450 数据手册

与LM49450相关器件

与LM49450相关文章

您还可以找

您在本页遇到什么问题？