Datasheet > LM4901IBP

LM4901IBP

更新时间： 2024-09-28 23:47:11

品牌	Logo	应用领域
其他 - ETC		音频放大器
页数	文件大小	规格书
21页	1061K
描述
AUDIO AMPLIFIER\|SINGLE\|BGA\|8PIN\|PLASTIC

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LM4901IBP 数据手册

December 2001

LM4901

1 Watt Audio Power Amplifier with Selectable Shutdown

Logic Level

General Description

Key Specifications

The LM4901 is an audio power amplifier primarily designed

for demanding applications in mobile phones and other por-

table communication device applications. It is capable of

delivering 1 watt of continuous average power to an 8Ω BTL

load with less than 1% distortion (THD+N) from a 5V_DC

power supply.

Improved PSRR at 217Hz & 1KHz

Power Output at 5.0V & 1% THD

Power Output at 3.0V & 1% THD

Shutdown Current

62dB

1.0W(typ.)

375mW(typ.)

0.1µA(typ.)

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. The LM4901 does not require output

coupling capacitors or bootstrap capacitors, and therefore is

ideally suited for mobile phone and other low voltage appli-

cations where minimal power consumption is a primary re-

quirement.

Features

n Available in space-saving packages: micro SMD and

MSOP

n Ultra low current shutdown mode

n BTL output can drive capacitive loads

n Improved pop & click circuitry eliminates noise during

turn-on and turn-off transitions

n 2.0 - 5.5V operation

n No output coupling capacitors, snubber networks or

bootstrap capacitors required

The LM4901 features a low-power consumption shutdown

mode. To facilitate this, Shutdown may be enabled by either

logic high or low depending on mode selection. Driving the

shutdown mode pin either high or low enables the shutdown

pin to be driven in a likewise manner to enable shutdown.

n Unity-gain stable

n External gain configuration capability

n User select shutdown High or Low

The LM4901 contains advanced pop & click circuitry which

eliminates noise which would otherwise occur during turn-on

and turn-off transitions.

The LM4901 is unity-gain stable and can be configured by

external gain-setting resistors.

Applications

n Mobile Phones

n PDAs

n Portable electronic devices

Typical Application

DS200198-1

FIGURE 1. Typical Audio Amplifier Application Circuit

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

DS200198

www.national.com

12 3 4 5 6 7...21

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与LM4901IBP相关器件

型号	品牌	获取价格	描述	数据表
LM4901IBPX	ETC	获取价格	AUDIO AMPLIFIER\|SINGLE\|BGA\|8PIN\|PLASTIC
LM4901LD	NSC	获取价格	1.6 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
LM4901LDX/NOPB	NSC	获取价格	IC,AUDIO AMPLIFIER,SINGLE,LLCC,10PIN,PLASTIC
LM4901MA	TI	获取价格	IC,HEADPHONE DRIVER,SOP,8PIN,PLASTIC
LM4901MM	NSC	获取价格	1.6 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
LM4901MM/NOPB	TI	获取价格	IC 1.6 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10, MSOP-10, Audio/Video Amplifier
LM4901MMX	NSC	获取价格	IC 1.6 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10, MSOP-10, Audio/Video Amplifier
LM4901MMX/NOPB	NSC	获取价格	IC 1.6 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10, MSOP-10, Audio/Video Amplifier
LM4902	NSC	获取价格	265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode
LM4902	TI	获取价格	265mW 单声道、模拟输入 AB 类音频放大器

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