LM4881N

更新时间： 2024-09-29 22:51:39

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器
页数	文件大小	规格书
11页	416K
描述
Dual 200 mW Headphone Amplifier with Shutdown Mode

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LM4881N 数据手册

September 1997

LM4881

Dual 200 mW Headphone Amplifier with Shutdown Mode

General Description

Key Specifications

The LM4881 is a dual audio power amplifier capable of deliv-

ering 200 mW of continuous average power into an 8Ω load

with 0.1% (THD) from a 5V power supply.

n THD at 1 kHz at 125 mW

continuous average output

power into 8Ω

0.1% (max)

0.02% (typ)

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components using surface mount packaging. Since

the LM4881 does not require bootstrap capacitors or snub-

ber networks, it is optimally suited for low-power portable

systems.

n THD at 1 kHz at 75 mW continuous

average output power into 32Ω

n Output power at 10 THD+N

at 1 kHz into 8Ω

300 mW (typ)

0.7 µA (typ)

n Shutdown Current

The LM4881 features an externally controlled, low power

consumption shutdown mode which is virtually clickless and

popless, as well as an internal thermal shutdown protection

mechanism.

Features

n MSOP surface mount packaging

n Unity-gain stable

The unity-gain stable LM4881 can be configured by external

gain-setting resistors.

n External gain configuration capability

n Thermal shutdown protection circuitry

n No bootstrap capacitors, or snubber circuits are

necessary

Applications

n Headphone Amplifier

n Personal Computers

n Microphone Preamplifier

Typical Application

Connection Diagrams

MSOP Package

DS100005-2

SOP and DIP Package

DS100005-1

*Refer to the Application Information Section for information concerning

proper selection of the input and output coupling capacitors.

DS100005-38

FIGURE 1. Typical Audio Amplifier Application Circuit

Top View

Order Number LM4881MM, LM4881M, or LM4881N

See NS Package Number MUA08A, M08A, or N08E

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

DS100005

www.national.com

12 3 4 5 6 7...11

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