Datasheet > LM4663MT

LM4663MT

更新时间： 2024-09-14 22:51:51

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
10页	609K
描述
2 Watt Stereo Class D Audio Power Amplifier with Stereo Headphone Amplifier

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LM4663MT 数据手册

January 2000

LM4663

2 Watt Stereo Class D Audio Power Amplifier with Stereo

Headphone Amplifier

83 (typ)

n Efficiency at 2 Watt into 4Ω

General Description

n Efficiency at 250mW into 4Ω

n Total quiescent power supply current

n Total shutdown power supply current

n THD+N 1kHz, 20mW, 32Ω (Headphone)

n Single supply range

69 (typ)

The LM4663 is a fully integrated single supply, high effi-

ciency Class D audio power amplifier solution. The LM4663

utilizes a continuous time delta-sigma modulation technique

that lowers output noise and THD when compared to con-

ventional pulse width modulators.

22mA (typ)

2µA (typ)

0.15 (typ)

4.5V to 5.5V

The LM4663 also features a stereo headphone amplifier that

Features

delivers 80mW into a 32Ω headset with less than 0.5 THD.

The LM4663 has two stereo inputs that can be selected to

drive either the headphone amplifier or the Class D amplifier.

All amplifiers are protected with thermal shutdown.

n Delta-sigma modulator.

n Two stereo input selector.

n “Click and pop” suppression circuitry.

n Micropower shutdown mode.

In standby mode, the LM4663 draws an extremely low 2µA

supply current. With a 4Ω load, the IC’s efficiency for a

n 24 lead TSSOP package (No heatsink required).

n Stereo headphone amplifier.

250mW power level is 69 , reaching 83 at a power level

of 2W. The IC features click and pop reduction circuitry that

minimizes audible popping during device turn-on and

turn-off. The LM4663 is available in a 24-lead TSSOP pack-

age, ideal for portable and desktop computer applications.

Applications

n Portable computers

n Desktop computers

n Multimedia Monitors

Key Specifications

n P_Oat THD+N 1

2.1W (typ)

n THD+N at 1kHz at 1 Watt into 4Ω (Power

Amp)

0.2 (typ)

Block Diagram

Connection Diagram

TSSOP Package

DS101269-2

Top View

Order Number LM4663MT

See NS Package Number MTC24

(TSSOP Package)

DS101269-1

™

BOOMER is a trademark of National Semiconductor Corporation.

DS101269

www.national.com

12 3 4 5 6 7...10

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