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发布者:来自网络 发布时间:2014-5-27 阅读:2660次    关键字: 音频功放
EUA6211-无需输出电容内建负压的G类耳机音频放大器


EUA6211-无需输出电容内建负压的G类耳机音频放大器 DataSheet

概述

EUA6211是一款采高压工艺并集成反相电荷泵电源的G类音频放大器,透过G类输出级提供良好的性能,相较于AB类组件具有更高的效率,不存在与D类放大器相关的EMI干扰。EUA6211在单电源2.5~5V供应,低耗电流3.8mA,16Ω同相双负载下,最大输出功率达120mW (THD+N=1%),且在1KHz拥有80dB PSRR。G类输出级架构无需输出大电容以及拥有超低THD+N,使其适合于行动电话以及其它可携式设备的耳机放大应用。EUA6211采用TDFN-12与WCSP-12 (1.5mmX2mm)封装。

特点

‧2.5V到5.5V操作
‧固定 -1.5 V/V增益
‧0.03% THD+N
‧80dB PSRR (1KHz输入)
‧防POP音设计
‧低耗电流(3.8mA)
‧内置shutdown控制电路
‧16Ω同相双负载输出功率达120mW
‧短路和过热保护
‧TDFN-12与WCSP-12(1.5mmX2mm)封装

应用

‧行动电话
‧个人媒体播放器
‧笔记型计算机
‧掌上游戏机
‧平板计算机

EUA6211-Advanced Stereo Headphone Amplifier 

Description
EUA6211 is a dual audio power amplifier designed for portable communication device applications such as mobile phones. EUA6211 operates from a single 2.5V to 5.5V supply, consumes only 3.8mA of supply current, capable of delivering 30mW of continuous average power a 16Ω load from a 3V power supply with a THD+N of 1%.
Base on the power supply delivered to the device, an internal power management block generates a negative voltage. Thus, the internal amplifiers provide outputs referenced to Ground. In this configuration, the two external heavy coupling capacitors can be removed. It offers significant space and cost savings compared to a typical stereo application.
EUA6211 has an internal gain of – 1.5V/V with low 0.03% THD+N performance. An 80dB at 1kHz power-supply rejection ratio (PSRR) allows these devices to operate from noisy digital supplies without an additional linear regulator. Comprehensive click-and-pop circuitry suppresses audible clicks and pops on startup and shutdown.
Other features include short-circuit and thermal-overload protection, and are specified over the extended -40°C to +85°C temperature range. EUA6211 can also use in line driver application. The device is available in TDFN-12 package.

Feature
• No Bulky DC-Blocking Capacitors Required
• 2.5V to 5.5V Operation
• Fixed -1.5V/V Gain
• Low 0.03% THD+N
• High PSRR (80dB at 1kHz)
• Integrated Click-and-Pop Suppression
• Low Quiescent Current (3.8mA)
• Low-Power Shutdown Mode, < 0.1µA
• SNR>105dB
• Typical Vn<10μVms 20Hz-20kHz
• THD+N<0.005% at 10kΩ Load
• 2Vrms Output Voltage 600Ω Load
• Short Circuit and Thermal Protection
• ±8kV HBM ESD-Protected Outputs
• Available in TDFN-12 Package
• RoHS Compliant and 100% Lead(Pb)-Free Halogen-Free

Application
• Cellular Phones
• MP3 Players
• Notebook PCs
• Handheld Gaming Consoles

 

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