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发布者:来自网络 发布时间:2019/3/26 阅读:4223次    关键字: 音频功放
EUA6632-增益可调节的3-VRMS音频线路驱动器


EUA6632-增益可调节的3-VRMS音频线路驱动器 DataSheet 

概述
EUA6632是一款增益可调节的3-Vrms音频线路驱动芯片。能够在采用3.3V电源电压的条件下向一个10 kΩ负载输送2Vrms的驱动电压。EUA6632具有差分输入,采用外部增益设定电阻以支持±1V/V到 ±10V/V的增益范围, 并且每个通道可以单独配置增益。EUA6632具有内置有源静音控制电路可实现无啪啪声的音频开启/关断控制。EUA6632具有外部欠压检测电路,当电源被拿掉时使输出静音以确保无啪啪声的关断操作。与传统方式相比, 使用此款线路驱动器可以使用较少外部器件即达到3Vrms的输出。EUA6632内部集成了一个电荷泵以产生一个负电源轨,不需要采用一个高于3.3V的电源或者一个分离轨电源来满足其5.6Vpp输出, 可提供一个干净的无啪啪声的接地偏置3Vrms输出。EUA6632采用TSSOP 14引脚的封装。

特点
• 电源电压:3V到5V
• 采用3.3V电源时,可向10kΩ负载输送2Vrms电压
• 低THD+N:<0.01%时,可向10kΩ负载输送2Vrms
• 高SNR>90dB
• 可支持16Ω输出负载
• 差分输入单端输出
• 可使用外部增益设定电阻来设置增益
• 接地参考输出可较少隔直流电容器
- 缩减了板级空间
- 降低了组件成本
- 改善了THD+N性能
- 避免出现因输出电容器所导致的低频响应性能下降
• 短路保护功能
• 咔嗒声和啪啪声抑制电路
• 外部欠压静音
• 用于实现无啪啪声音频开启/关断的有源静音控制电路

应用
• 机顶盒
• 蓝光光盘、DVD 播放器
• LCD and PDP TV
• 迷你型/微型组合音响系统
• 声卡
• 笔记本电脑


EUA6632-3-VRMS Audio Line Driver With Adjustable Gain 

Description
The EUA6632 is a 3-Vrms audio line driver with adjustable gain. The EUA6632 is capable of driving 2 Vrms a 10kΩ load with 3.3-V supply voltage. The device has differential inputs and uses external gain-setting resistors to support a gain range of ±1V/V to ±10V/V, and gain can be configured individually for each channel. The EUA6632 has built-in active-mute control for pop-free audio on/off control. The EUA6632 has an external under voltage detector that mutes the output when the power supply is removed, ensuring a pop free shutdown. Using the EUA6632 in audio products can reduce component count considerably compared to traditional methods of generating a 3-vrms output. The EUA6632 does not require a power supply greater than 3.3V to generate its 5.6-Vpp output, nor does it require a split-rail power supply. The EUA6632 integrates its own charge pump to generate a negative supply rail that provides a clean, pop-free ground-biased 3-Vrms output. The EUA6632 is available in a 14-pin TSSOP.

Feature
• Supply Voltage 3V to 5V
• 2Vrms 10kΩ With 3.3V Supply
• Low THD+N<0.01% at 2Vrms 10kΩ
• High SNR>90dB
• 16Ω Output Load Compliant
• Differential Input and Single-Ended Output
• Adjustable Gain by External Gain-Setting Resistors
• Ground-Referenced Outputs Eliminate DC Blocking Capacitors
- Reduce Board Area
- Reduce Component Cost
- Improve THD+N performance
- No Degradation of Low Frequency Response Due to Output Capacitors
• Short-Circuit Protection
• Click and Pop-Reduction Circuitry
• External Under voltage Mute
• Active Mute Control for Pop-free Audio On/Off Control
• RoHS compliant and 100% lead(Pb)-free Halogen-Free

Application
• Set-Top Boxes
• Blue-ray Disc、DVD Players
• LCD and PDP TV
• Mini/Micro Combo Systems
• Sound Cards
• Laptops

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