Datasheet > LM4926

LM4926

更新时间： 2024-09-19 04:20:07

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器
页数	文件大小	规格书
22页	1589K
描述
Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW Stereo Headphone Amplifier

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

LM4926 数据手册

June 2005

LM4926

Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW

Stereo Headphone Amplifier

General Description

Key Specifications

The LM4926 is a ground referenced, fixed-gain audio power

amplifier capable of delivering 80mW of continuous average

power into a 16Ω single-ended load with less than 1%

THD+N from a 3V power supply.

Improved PSRR at 217Hz

Power Output at V_DD= 3V,

R_L= 16Ω, THD % 1%

Shutdown Current

70dB (typ)

80mW (typ)

0.01µA (typ)

1.5V/V (typ)

1.6V to 4.2V

The LM4926 features a new circuit technology that utilizes a

charge pump to generate a negative reference voltage. This

allows the outputs to be biased about ground, thereby elimi-

nating output-coupling capacitors typically used with normal

single-ended loads.

Internal Fixed Gain

Operating Voltage

The LM4926 features an Automatic Standby Mode circuitry

(patent pending). In the absence of an input signal, after

approximately 12 seconds, the LM4926 goes into low cur-

rent standby mode. The LM4926 recovers into full power

operating mode immediately after a signal is applied to either

the left or right input pins. This feature saves power supply

current in battery operated applications.

Features

n Ground referenced outputs

n High PSRR

n Available in space-saving micro SMD package

n Ultra low current shutdown mode

n Improved pop & click circuitry eliminates noises during

turn-on and turn-off transitions

n No output coupling capacitors, snubber networks,

bootstrap capacitors, or gain-setting resistors required

n Shutdown either channel independently

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. The LM4926 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.

Applications

n Notebook PCs

n Mobile Phone

n PDAs

n Portable electronic devices

n MP3 Players

The LM4926 features a low-power consumption shutdown

mode selectable for either channel separately. This is ac-

complished by driving either the SD_RC (Shutdown Right

Channel) or SD_LC (Shutdown Left Channel) (or both) pins

with logic low, depending on which channel is desired shut-

down. Additionally, the LM4926 features an internal thermal

shutdown protection mechanism.

The LM4926 contains advanced pop & click circuitry that

eliminates noises which would otherwise occur during

turn-on and turn-off transitions.

The LM4926 has an internal fixed gain of 1.5V/V.

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

DS201161

www.national.com

12 3 4 5 6 7...22

中文翻译

下载PDF

与LM4926相关器件

型号	品牌	获取价格	描述	数据表
LM4926TL	NSC	获取价格	IC 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA14, MICRO, SMD-14, Audio/Video Amplifier
LM4926TLX	NSC	获取价格	IC 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA14, MICRO, SMD-14, Audio/Video Amplifier
LM4927	NSC	获取价格	2.5 Watt Fully Differential Audio Power Amplifier With Shutdown
LM49270	NSC	获取价格	Filterless 2.2W Stereo Class D Audio Subsystem with OCL Headphone Amplifier, 3D Enhancemen
LM49270SQ	NSC	获取价格	Filterless 2.2W Stereo Class D Audio Subsystem with OCL Headphone Amplifier, 3D Enhancemen
LM4927SD	NSC	获取价格	2.5 Watt Fully Differential Audio Power Amplifier With Shutdown
LM4927SDX	NSC	获取价格	IC 2.5 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8, LLP-8, Audio/Video Amplifier
LM4928	NSC	获取价格	1.2 Watt Stereo Fully Differential Audio Amplifier with RF Suppression and Shutdown Low
LM4928SD	NSC	获取价格	1.2 Watt Stereo Fully Differential Audio Amplifier with RF Suppression and Shutdown Low
LM4928SDX	NSC	获取价格	IC 2.2 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO14, LLP-14, Audio/Video Amplifier

与LM4926相关文章

摩尔斯微电子在美国约书亚树国家公园测试 Wi-Fi HaLow
2024-09-18

29
贸泽上架Tallysman TW5386智能GNSS天线
2024-09-18

28
SL74HC10N：高性能三输入与非门解析
2024-09-03

100
AIC1781A 电池充电控制器深度解析
2024-09-03

94

产品中心

服务支持

精选活动

关于我们

帮助中心

LM4926

LM4926 数据手册

与LM4926相关器件

与LM4926相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LM4926

LM4926 数据手册

与LM4926相关器件

与LM4926相关文章

您还可以找

您在本页遇到什么问题？