Datasheet > LM4929

LM4929

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
页数	文件大小	规格书
13页	897K
描述
Stereo 40mW Low Noise Headphone Amplifier with OCL Output

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LM4929 数据手册

December 2004

LM4929

Stereo 40mW Low Noise Headphone Amplifier

with OCL Output

General Description

Key Specifications

The LM4929 is an stereo audio power amplifier capable of

delivering 40mW per channel of continuous average power

into a 16Ω load or 25mW per channel into a 32Ω load at 1%

THD+N from a 3V power supply.

PSRR at 217Hz and 1kHz

65dB (typ)

Output Power at 1kHz with V_DD= 2.4V,

1% THD+N into a 16Ω load

25mW (typ)

Output Power at 1kHz with V_DD= 3V,

Boomer audio power amplifiers were designed specifically to

provide high quality output power with a minimal amount of

external components. Since the LM4929 does not require

bootstrap capacitors or snubber networks, it is optimally

suited for low-power portable systems. The LM4929 is con-

figured for OCL (Output Capacitor-Less) outputs, operating

with no DC blocking capacitors on the outputs.

1% THD+N into a 16Ω load

40mW (typ)

2.0µA (max)

Shutdown current

Output Voltage change on release

1mV (max)

from Shutdown V_DD= 2.4V, R_L= 16Ω

The LM4929 features a low-power consumption shutdown

mode with a faster turn on time. Additionally, the LM4929

features an internal thermal shutdown protection mecha-

nism.

Features

n OCL outputs — No DC Blocking Capacitors

n External gain-setting capability

n Available in space-saving MSOP package

n Ultra low current shutdown mode

n 2V - 5.5V operation

The LM4929 is unity gain stable and may be configured with

external gain-setting resistors.

n Ultra low noise

Applications

n Portable CD players

n PDAs

n Portable electronics devices

Block Diagram

20132441

FIGURE 1. Block Diagram

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

DS201324

www.national.com

12 3 4 5 6 7...13

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与LM4929相关器件

型号	品牌	获取价格	描述	数据表
LM4929MM	NSC	获取价格	Stereo 40mW Low Noise Headphone Amplifier with OCL Output
LM4929MMX/NOPB	TI	获取价格	40mW 单声道模拟输入耳机放大器 \| DGS \| 10 \| -40 to 85
LM4930	NSC	获取价格	Audio Subsystem with Stereo Headphone & Mono Speaker Amplifiers
LM4930	TI	获取价格	具有立体声耳机和单声道扬声器放大器的音频子系统
LM4930_04	NSC	获取价格	Audio Subsystem with Stereo Headphone & Mono Speaker Amplifiers
LM4930ITL	NSC	获取价格	Audio Subsystem with Stereo Headphone & Mono Speaker Amplifiers
LM4930ITL/NOPB	NSC	获取价格	IC SPECIALTY CONSUMER CIRCUIT, PBGA36, MICRO SMD-36, Consumer IC:Other
LM4930ITLX/NOPB	TI	获取价格	具有立体声耳机和单声道扬声器放大器的音频子系统 \| YZR \| 36 \| -30 to 8
LM4930LQ	NSC	获取价格	IC SPECIALTY CONSUMER CIRCUIT, QCC44, LLP-44, Consumer IC:Other
LM4930LQ/NOPB	NSC	获取价格	IC SPECIALTY CONSUMER CIRCUIT, QCC44, LLP-44, Consumer IC:Other