LM4870MX

更新时间： 2024-11-09 13:09:23

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
8页	263K
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LM4870MX 数据手册

October 1997

LM4870

1.1W Audio Power Amplifier with Shutdown Mode

General Description

Key Specifications

The LM4870 is a bridge-connected audio power amplifier ca-

pable of delivering 1.1W of continuous average power to an

8Ω load with less than 0.5% THD+N over the audio spectrum

from a 5V power supply.

n THD+N at 1W into 8Ω

0.5% (max)

1.5W (typ)

n Output power into 8Ω at 1kHz

at 10%THD+N

n Shutdown Current

0.6µA (typ)

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal number of

external components. Since the LM4870 does not require

output coupling capacitors, bootstrap capacitors or snubber

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

tems.

Features

n No output coupling capacitors, bootstrap capacitors, or

snubber circuits are necessary

n Small Outline (SOIC) power packaging

n Unity-gain stable

n External gain configuration capability

The LM4870 features an externally controlled, low-power

consumption shutdown mode, as well as an internal thermal

shutdown protection mechanism. It also includes two head-

phone control inputs and a headphone sense output for ex-

ternal monitoring. The LM4870 is unity-gain stable and the

gain is set using external resistors.

Applications

n Personal computers

n Desktop computers

n Low voltage audio system

Typical Application

Connection Diagram

Small Outline Package

DS100094-2

Top View

Order Number LM4870M

See NS Package Number M16A

DS100094-1

FIGURE 1. Typical Audio Amplifier Application Circuit

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

DS100094

www.national.com

12 3 4 5 6 7 8

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