Datasheet > LM49450

LM49450

更新时间： 2024-11-22 02:58:15

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

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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

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与LM49450相关器件

型号	品牌	获取价格	描述	数据表
LM49450_15	TI	获取价格	Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Ref
LM49450SQ	NSC	获取价格	IC 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC32, 5 X 5 MM, 0.80 MM HEIGHT, LLP-32, Audio/Video
LM49450SQ/NOPB	TI	获取价格	Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Ref
LM49450SQX	TI	获取价格	IC,AUDIO AMPLIFIER,DUAL,LLCC,28PIN,PLASTIC
LM49450SQX/NOPB	TI	获取价格	Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Ref
LM4946	NSC	获取价格	Output Capacitor-Less Audio Subsystem with Programmable National 3D
LM4946_07	NSC	获取价格	Output Capacitor-Less Audio Subsystem with Programmable National 3D
LM4946SQ	NSC	获取价格	Output Capacitor-Less Audio Subsystem with Programmable National 3D
LM4946SQX	NSC	获取价格	IC 1.3 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC24, LLP-24, Audio/Video Amplifier
LM4946SQX/NOPB	TI	获取价格	IC,AUDIO AMPLIFIER,TRIPLE,LLCC,24PIN,PLASTIC

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