LM48413

更新时间： 2024-09-17 05:42:23

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器功率放大器
页数	文件大小	规格书
22页	378K
描述
Ultra Low EMI, Filterless, 1.2W Stereo Class D Audio Power Amplifier with E2S and National 3D Enhancement

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LM48413 数据手册

January 9, 2009

LM48413ꢀ

Ultra Low EMI, Filterless, 1.2W Stereo Class D Audio Power

Amplifier with E²S and National 3D Enhancement

General Description

Key Specifications

The LM48413 is a single supply, high efficiency, 1.2W/chan-

nel, filterless switching audio amplifier. The LM48413 fea-

tures National’s Enhanced Emissions Suppression (E²S)

system - a unique patented ultra low EMI, spread spectrum,

PWM architecture. It significantly reduces RF emission while

preserving audio quality and efficiency. The E²S system im-

proves battery life, reduces external component count, board

area consumption, system cost and product design cycle

time. The LM48413TL is available in a micro-SMD package,

further saving space.

■ꢀQuiescent Power Supply Current

at 3.6V supply

4mA (typ)

1.2W (typ)

■ꢀPower Output at V_DD= 5V,

R_L= 8Ω, THD ≤ 1%

0.03μA (typ)

80% (typ)

85% (typ)

86% (typ)

■ꢀShutdown current

■ꢀEfficiency at 3.6V, 100mW into 8Ω

■ꢀEfficiency at 3.6V, 500mW into 8Ω

■ꢀEfficiency at 5V, 1W into 8Ω

The LM48413 is designed to meet the demands of mobile

phones and other portable communication devices. Operat-

ing from a single 5V supply, the device is capable of delivering

1.2W/channel of continuous output power to a 8Ω load with

less than 1% THD+N. Flexible power supply requirements al-

low operation from 2.4V to 5.5V. The wide band spread

spectrum architecture of the LM48413 reduces EMI-radiated

emissions due to the modulator frequency.

Features

E²S system reduces EMI preserving audio quality and

efficiency

■

Output Short Circuit Protection

Stereo Class D operation

No output filter required

■

The LM48413 features high efficiency compared with con-

ventional Class AB amplifiers. The E²S system includes an

advanced, patent-pending edge rate control (ERC) architec-

ture that further reduce emissions by minimizing the high

frequency components of the device output, while maintain-

ing its high quality audio reproduction and high efficiency (η

= 85% at V_DD= 3.6V, P_O= 500mW). The LM48413 also in-

cludes National’s 3D audio enhancement that improves

stereo sound quality. In devices where the left and right

speakers are in close proximity, 3D enhancement affects

channel specialization, widening the perceived soundstage.

National 3D Enhancement

Minimum external components

Click and Pop suppression

Micro-power shutdown

Available in space-saving approximately 2mm x 2.2mm

micro SMD package

Applications

Mobile phones

Output short circuit protection prevents the device from being

damaged during fault conditions. Superior click and pop sup-

pression eliminates audible transients on power up/down and

during shutdown. Shutdown control also provided to maxi-

mizes power savings.

■

PDAs

Laptops

EMI Plot Using 6 inch Speaker Cables

EMI Radiation vs Frequency

V_DD= 3V, R_L= 15μH + 8Ω + 15μH

30063536

Boomer® is a registered trademark of National Semiconductor Corporation.

300635

www.national.com

12 3 4 5 6 7...22

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与LM48413相关器件

型号	品牌	获取价格	描述	数据表
LM48413TL	NSC	获取价格	Ultra Low EMI, Filterless, 1.2W Stereo Class D Audio Power Amplifier with E2S and National
LM48413TLX	NSC	获取价格	Ultra Low EMI, Filterless, 1.2W Stereo Class D Audio Power Amplifier with E2S and National
LM4841LQ	NSC	获取价格	Stereo 2W Amplifiers with DC Volume Control, Transient Free Outputs, and Cap-less Headphon
LM4841LQ/NOPB	ROCHESTER	获取价格	2 CHANNEL(S), VOLUME CONTROL CIRCUIT, QCC28, LLP-28
LM4841LQX/NOPB	TI	获取价格	IC,AUDIO AMPLIFIER,DUAL,LLCC,28PIN,PLASTIC
LM4841MH	NSC	获取价格	Stereo 2W Amplifiers with DC Volume Control, Transient Free Outputs, and Cap-less Headphon
LM4841MH/NOPB	TI	获取价格	IC 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28, TSSOP-28, Audio Control IC
LM4841MH/NOPB	ROCHESTER	获取价格	2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28, TSSOP-28
LM4841MHX	TI	获取价格	2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28, TSSOP-28
LM4841MHX/NOPB	TI	获取价格	2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28, TSSOP-28

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