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发布者:来自网络 发布时间:2014-5-27 阅读:1994次    关键字: 音频功放
EUA2011-3W单声道Filterless-D类音频放大器


EUA2011-3W单声道Filterless-D类音频放大器 DataSheet

概述
EUA2011是一款高效率的,3W单声道的D类音频放大器。它用一种低噪声的、filterlessPWM的架构,无需输出滤波器,减少外围器件数,降低系统成本,简化系统设计。当电源电压为5V时,EUA2011 能在输出负载为4Ω的扬声器上,输送出3W/10%或2W/1%的输出功率及失真度。
与AB类放大器相比,EUA2011具有高效能的特性。当电源电压3.6 V而输出负载为8Ω扬声器,输出功率400 mW时其效率为88%。
在移动电话听筒及耳机的装置上,EUA2011是能输出悦耳音调的音频功率放大器。EUA2011的放大音量是允许由外部各音源独立控制的。
EUA2011采用TDFN以及WCSP封装。

特点
• 单一调变方案来减少EMI干扰
• 工作电压3.6V,负载8Ω的扬声器:
- 输出功率400mW时,效率高达88%
- 输出功率100mW时,效率高达80%
• 静态电流 2.4mA,关断电流0.5uA
• 工作电压2.5 V至5.5 V
• 采用优化的PWM输出架构,无需输出LC滤波器
• 高PSRR(-72dB),无需稳压器
• 全差动设计用以抑制射频干扰,无需旁通电容
• 高CMRR,输入无需耦合电容器
• 内部工作频率250kHz
• 内含POP 及Click噪音抑制电路
• 1.5mmx1.5mm WCSP 及 3mmx3mm TDFN-8 封装
• 符合RoHS规范及Pb-Free

应用
• 无线或移动电话和PDA应用

EUA2011-3W Mono Filterless Class-D Audio Power Amplifier 

Description
The EUA2011 is a high efficiency, 3W mono class-D audio power amplifier. A low noise, filterless PWM architecture eliminates the output filter, reducing external component count, system cost, and simplifying design.
Operating in a single 5V supply, EUA2011 is capable of driving 4Ω speaker load at a continuous average output of 3W/10% THD+N or 2W/1% THD+N. The EUA2011 has high efficiency with speaker load compared to a typical class AB amplifier. With a 3.6V supply driving an 8Ω speaker , the efficiency for a 400mW power level is 88%.
In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the EUA2011. The gain of EUA2011 is externally configurable which allows independent gain control from multiple sources by summing signals from separate sources.
The EUA2011 is available in space-saving WCSP and TDFN packages.

Feature
• Unique Modulation Scheme Reduces EMI Emissions
• Efficiency at 3.6V With an 8-Ω Speaker: - 88% at 400 mW - 80% at 100 mW
• Low 2.4-mA Quiescent Current and 0.5-μA Shutdown Current
• 2.5V to 5.5V Wide Supply Voltage
• Shutdown Pin Compatible with 1.8V Logic GPIO
• Optimized PWM Output Stage Eliminates LC Output Filter
• Improved PSRR (-72 dB) Eliminates Need for a Voltage Regulator
• Fully Differential Design Reduces RF Rectification and Eliminates Bypass Capacitor
• Improved CMRR Eliminates Two Input Coupling Capacitors
• Internally Generated 250-kHz Switching Frequency
• Integrated Pop and Click Suppression Circuitry
• 1.5mm x 1.5mm Wafer Chip Scale Package (WCSP) and 3mm x 3mm TDFN-8 package
• RoHS Compliant and 100% Lead (Pb)-Free

Application
• Ideal for Wireless or cellular Handsets and PDAs

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  • 下篇文章EUA2011A-低EMI低失真2.5W单声道Filterless-D类音频放大器
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