LM48901

更新时间： 2024-09-23 11:36:31

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
51页	805K
描述
Audio Power Amplifier Series

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LM48901 数据手册

January 5, 2012

LM48901

Quad Class D Spatial Array

General Description

Features

The LM48901 is a quad Class D amplifier that utilizes Texas

Instruments’ proprietary spatial sound processor to create an

enhanced sound stage for portable multimedia devices. The

Class D output stages feature Texas Instruments’ edge rate

control (ERC) PWM architecture that significantly reduces RF

emissions while preserving audio quality and efficiency.

The LM48901’s flexible I²S interface is compatible with stan-

dard serial audio interfaces. A stereo differential-input ADC

gives the device the ability to process analog stereo audio

signals.

The LM48901 is configured through an I²C compatible inter-

face and is capable of delivering 2.8W/channel of continuous

output power into an 4Ω load with less than 10% THD+N. A

2.1 mode pairs two output drivers in parallel, increasing cur-

rent drive for 4Ω loads.

Output short circuit and thermal overload protection prevent

the device from being damaged during fault conditions. Su-

perior click and pop suppression eliminates audible transients

on power-up/down and during shutdown. The LM48901 is

available in space saving microSMD and LLP packages.

Spatial Sound Processing

■

I²S Compatible Input

Differential-Input Stereo ADC

Edge Rate Control Reduces EMI while Preserving Audio

Quality and Efficiency

■

Paralleled Output Mode

■

Short Circuit and Thermal Overload Protection

Minimum external components

Click and Pop suppression

Micro-power shutdown

Available in space-saving micro SMD and LLP packages

Applications

Laptops

■

Tablets

Desktop Computers

Sound Bars

Multimedia Devices

MP3 Player Accessories

Key Specifications

Docking Stations

■ꢀSNR (A-Weighted)

■ꢀOutput Power/channel, PV_DD= 5V

R_L= 8Ω, THD+N ≤10%

R_L= 4Ω, THD+N ≤10%

■ꢀTHD+N

■ꢀEfficiency/Channel

■ꢀPSRR at 217Hz

■ꢀShutdown current

87dBA (typ)

1.7W (typ)

2.8W (typ)

0.06% (typ)

89% (typ)

71dB (typ)

1μA (typ)

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

301692 SNAS520C

www.ti.com

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