LM4950

更新时间： 2024-11-20 23:16:47

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
25页	1441K
描述
7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier

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LM4950 数据手册

August 2004

LM4950

7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier

General Description

Key Specifications

The LM4950 is a dual audio power amplifier primarily de-

signed for demanding applications in flat panel monitors and

TV’s. It is capable of delivering 3.1 watts per channel to a 4Ω

single-ended load with less than 1% THD+N or 7.5 watts

mono BTL to an 8Ω load, with less than 10% THD+N from a

12V_DCpower supply.

Quiscent Power Supply Current

16mA (typ)

3.1W (typ)

P_OUT(SE)

V_DD= 12V, R_L= 4Ω, 1% THD+N

P_OUT(BTL)

V_DD= 12V, R_L= 8Ω, 10% THD+N

Shutdown current

7.5W (typ)

40µA (typ)

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. The LM4950 does not require boot-

strap capacitors or snubber circuits. Therefore, it is ideally

suited for display applications requiring high power and mini-

mal size.

Features

n Pop & click circuitry eliminates noise during turn-on and

turn-off transitions

The LM4950 features a low-power consumption active-low

shutdown mode. Additionally, the LM4950 features an inter-

nal thermal shutdown protection mechanism along with short

circuit protection.

n Low current, active-low shutdown mode

n Low quiescent current

n Stereo 3.1W output, R_L= 4Ω

n Mono 7.5W BTL output, R_L= 8Ω

n Short circuit protection

The LM4950 contains advanced pop & click circuitry that

eliminates noises which would otherwise occur during

turn-on and turn-off transitions.

n Unity-gain stable

n External gain configuration capability

The LM4950 is a unity-gain stable and can be configured by

external gain-setting resistors.

Applications

n Flat Panel Monitors

n Flat panel TV’s

n Computer Sound Cards

Typical Application

20047078

FIGURE 1. Typical Bridge-Tied-Load (BTL) Audio Amplifier Application Circuit

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

DS200470

www.national.com

12 3 4 5 6 7...25

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与LM4950相关器件

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