LM48557

更新时间： 2024-11-11 05:42:23

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器
页数	文件大小	规格书
24页	592K
描述
Mono, Bridge-Tied Load, Ceramic Speaker Driver with I2C Volume Control and Reset

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM48557 数据手册

August 6, 2009

LM48557

Mono, Bridge-Tied Load, Ceramic Speaker Driver with I²C

Volume Control and Reset

General Description

Key Specifications

The LM48557 is a single supply, mono, ceramic speaker driv-

er with an integrated charge-pump, designed for portable

devices, such as cell phones and portable media players,

where board space is at a premium. The LM48557 charge

pump allows the device to deliver 5.8V_RMSfrom a single 4.2V

supply.

■ꢀOutput Voltage at V_DD= 4.2V

R_L= 1µF +22Ω, THD+N ≤ 1%

5.8V_RMS(typ)

■ꢀQuiescent Power Supply Current

at 4.2V

5mA (typ)

80dB (typ)

■ꢀPSRR at 217Hz

■ꢀShutdown current

The LM48557 features high power supply rejection ratio

(PSRR), 80dB at 217Hz, allowing the device to operate in

noisy environments without additional power supply condi-

tioning. Flexible power supply requirements allow operation

from 2.7V to 4.5V. The LM48557 features an active low reset

input that reverts the device to its default state. Additionally,

the LM48557 features a 36-step I²C volume control and mute

function. The low power Shutdown mode reduces supply cur-

rent consumption to 0.01µA.

0.01μA (typ)

Features

Integrated Charge Pump

■

Bridge-tied Load Output

Differential Input

High PSRR

I²C Volume and Mode Control

The LM48557’s superior click and pop suppression elimi-

nates audible transients on power-up/down and during shut-

down. The LM48557 is available in an ultra-small 16-bump

micro SMD package (1.965mmx1.965mm).

Reset Input

Advanced Click-and-Pop Suppression

Low Supply Current

Minimum external components

■

Micro-power shutdown

Available in space-saving 16-bump micro SMD package

Applications

Mobile phones

■

PDAs

Notebook Electronic Devices

MP3 Players

Boomer® is a registered trademark of National Semiconductor Corporation.

300981

www.national.com

12 3 4 5 6 7...24

中文翻译

下载PDF

与LM48557相关器件

型号	品牌	获取价格	描述	数据表
LM48557TL	NSC	获取价格	Mono, Bridge-Tied Load, Ceramic Speaker Driver with I2C Volume Control and Reset
LM48557TLX	NSC	获取价格	Mono, Bridge-Tied Load, Ceramic Speaker Driver with I2C Volume Control and Reset
LM4855IBL	NSC	获取价格	Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System
LM4855ITL	NSC	获取价格	Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System
LM4855ITL/NOPB	NSC	获取价格	IC 1.1 W, 3 CHANNEL, AUDIO AMPLIFIER, PBGA18, MICRO SMD-18, Audio/Video Amplifier
LM4855ITL/NOPB	TI	获取价格	1.1W, 3 CHANNEL, AUDIO AMPLIFIER, PBGA18, GREEN, MICRO SMD-18
LM4855ITLX/NOPB	TI	获取价格	IC,AUDIO AMPLIFIER,DUAL,BGA,18PIN,PLASTIC
LM4855LQ	NSC	获取价格	Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System
LM4856	NSC	获取价格	Integrated Audio Amplifier System
LM48560	TI	获取价格	High Voltage Class H Ceramic Speaker Driver with Automatic Level Control