LM4946

更新时间： 2024-11-21 04:20:07

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
28页	1279K
描述
Output Capacitor-Less Audio Subsystem with Programmable National 3D

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

LM4946 数据手册

May 2006

LM4946

Output Capacitor-Less Audio Subsystem with

Programmable National 3D

General Description

Key Specifications

The LM4946 is an audio power amplifier capable of deliver-

ing 540mW of continuous average power into a mono 8Ω

bridged-tied load (BTL) with 1% THD+N, 35mW per channel

of continuous average power into stereo 32Ω single-ended

(SE) loads with 1% THD+N, or an output capacitor-less

(OCL) configuration with identical specifications as the SE

configuration, from a 3.3V power supply.

THD+N at 1kHz, 540mW

into 8Ω BTL (3.3V)

1.0% (typ)

THD+N at 1kHz, 35mW

into 32Ω SE (3.3V)

1.0% (typ)

2.7 to 5.5V

2.2 to 5.5V

Single Supply Operation (V_DD

I²C/SPI Single Supply Operation

)

The LM4946 has three input channels: one pair for a two-

channel stereo signal and the third for a differential single-

channel mono input. The LM4946 features a 32-step digital

volume control and eight distinct output modes. The digital

volume control, 3D enhancement, and output modes (mono/

SE/OCL) are programmed through a two-wire I²C or a three-

wire SPI compatible interface that allows flexibility in routing

and mixing audio channels.

Features

n I²C/SPI Control Interface

n I²C/SPI programmable National 3D Audio

n I²C/SPI controlled 32 step digital volume control (-54dB

to +18dB)

n Three independent volume channels (Left, Right, Mono)

n Eight distinct output modes

n LLP surface mount packaging

n “Click and Pop” suppression circuitry

n Thermal shutdown protection

The LM4946 is designed for cellular phone, PDA, and other

portable handheld applications. It delivers high quality output

power from a surface-mount package and requires only

seven external components in the OCL mode (two additional

components in SE mode).

n Low shutdown current (0.02uA, typ)

n RF immunity topology

Applications

n Mobile Phones

n PDAs

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

DS201628

www.national.com

12 3 4 5 6 7...28

中文翻译

下载PDF

与LM4946相关器件

型号	品牌	获取价格	描述	数据表
LM4946_07	NSC	获取价格	Output Capacitor-Less Audio Subsystem with Programmable National 3D
LM4946SQ	NSC	获取价格	Output Capacitor-Less Audio Subsystem with Programmable National 3D
LM4946SQX	NSC	获取价格	IC 1.3 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC24, LLP-24, Audio/Video Amplifier
LM4946SQX/NOPB	TI	获取价格	IC,AUDIO AMPLIFIER,TRIPLE,LLCC,24PIN,PLASTIC
LM4946TM	NSC	获取价格	Output Capacitor-Less Audio Subsystem with Programmable National 3D
LM4946TM/NOPB	NSC	获取价格	IC 1.3 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA25, ROHS COMPLIANT, MICRO, BUMP, SMD-25, Audio/V
LM4947	NSC	获取价格	Mono Class D and Stereo Audio Subsystem with OCL Headphone Amplifier and National 3D
LM4947	TI	获取价格	具有 87mW 耳机放大器和 3D 增强功能的 2.2W 单声道、模拟输入 D 类放大器
LM4947TL	NSC	获取价格	暂无描述
LM4947TL/NOPB	TI	获取价格	具有 87mW 耳机放大器和 3D 增强功能的 2.2W 单声道、模拟输入 D 类放大器

与LM4946相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

30
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

22
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

51
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

49

产品中心

服务支持

精选活动

关于我们

帮助中心

LM4946

LM4946 数据手册

与LM4946相关器件

与LM4946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

LM4946

LM4946 数据手册

与LM4946相关器件

与LM4946相关文章

您还可以找

您在本页遇到什么问题？