Datasheet > LM4914MH

LM4914MH

更新时间： 2024-09-09 23:16:47

品牌	Logo	应用领域
美国国家半导体 - NSC		音频放大器
页数	文件大小	规格书
15页	382K
描述
1W Monaural, 85mW Stereo Headphone Audio Amplifier

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LM4914MH 数据手册

March 2003

LM4914

1W Monaural, 85mW Stereo Headphone Audio Amplifier

General Description

Micro-power shutdown supply current

0.03µA (typ)

PSRR (f = 1kHz)

The unity-gain stable LM4914 is both a mono differential

output (for bridge-tied loads, or BTL) audio power amplifier

and a single-ended (SE) stereo headphone amplifier. Oper-

ating on a single 5V supply, the mono BTL mode delivers 1W

into an 8Ω load. In SE stereo mode, the amplifier delivers

85mW to 32Ω loads. The LM4914 features circuitry that

suppresses output transients ("clicks and pops").

V_DD= at 3.0V, BTL Mode

V_DD= at 5.0V, BTL Mode

52dB (typ)

Features

n Advanced "click and pop" suppression circuitry

n Stereo headphone amplifier mode

n Low current micro-power shutdown mode

n Thermal shutdown protection circuitry

n 2.5V to 5.5V operation

The LM4914 is designed for notebook and other handheld

portable applications. It delivers high quality output power

from a surface-mount package and requires few external

components. The LM4914 is pin and functionally compatible

with the TPA0253.

n Unity-gain stable

n Gain set with external resistors

n Space-saving exposed-DAP TSSOP package

Other features include an active-low micro-power shutdown

mode and thermal shutdown protection.

The LM4914 is available in a space efficient 10-lead

exposed-DAP TSSOP package.

Applications

n PDAs

n Cellular phones

Key Specifications

BTL output power (R_L= 8Ω)

n Handheld portable electronic devices

V_DD= at 3.0V, THD = 0.1%

V_DD= at 5.0V, THD = 0.1%

SE output power (R_L= 32Ω)

V_DD= at 3.0V, THD = 0.1%

V_DD= at 5.0V, THD = 0.1%

330mW (typ)

1W (typ)

30mW (typ)

85mW (typ)

Connection Diagram

200634A0

Top View

Order Number LM4914MH

See NS package Number MXF10A

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

DS200634

www.national.com

12 3 4 5 6 7...15

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