EUA2075-具有64步音量控制,AGC和耳机输出的2.8W/CH双声道无滤波立体声D类音频放大器  DataSheet
概述
EUA2075是一款高效率，双声道全桥式驱动（BTL），具有耳机输出的D类音频放大器。在工作电压为5V时，EUA2075每个通道可向4Ω负载连续输出2.8W的功率并具有10%的THD+N。EUA2075其内部采用64阶音量控制电路，扬声器增益范围为-70dB 到 20dB，耳机增益范围为-80dB 到to 3.5dB。AGC可以检测出由于输入信号过大而引起的输出信号clip并自动抑制clip。此外，AGC可以适应由电池供电电压降低引起的的输出clip。新型无滤波架构的采用使得EUA2075可以直接驱动扬声器，从而降低了系统功耗和PCB面积。
EUA2075提供短路保护和过温保护，以避免芯片的损毁。EUA2075采用24-pin SOP封装和20-pin 4×4 TQFN封装。
特点
•工作电压：2.7V到5.5V
•独特的调制方式减少EMI干扰
•负载4Ω，工作电压5V，单一通道输出功率可达2.8W
•64步DC音量控制
•耳机输出功能
•自动增益控制（AGC）
•具有过温及短路保护机制
•集成对Clik和Pop噪声的抑制电路
•24-pin SOP封装和20-pin TQFN封装
•符合RoHS规范及Pb-Free，Halogen-Free
应用
•液晶设备/电视机
•一体机
•便携式音频播放器
•笔记本电脑
EUA2075-2.8W/CH Stereo Filterless Class-D Audio Amplifier with 64-Step DC Volume Control, AGC and Headphone Output
Description
The EUA2075 is a high efficiency, 2 channel bridged-tied load (BTL), class-D audio power amplifier with headphone output. Operating from a 5V power supply, EUA2075 is capable of delivering 2.8W/channel of continuous output power to a 4Ω load with 10% THD+N. The EUA2075 features an advanced 64-step DC volume control which offers a range of speaker gain from -70dB to 20dB and a range of HP gain from -80dB to 3.5dB. The AGC detects output signal clip due to the over level input signal and suppresses it automatically. Moreover the AGC can adapt the output clip caused by power supply voltage down with battery. The new filter-less architecture allows the device to drive the speaker directly, without low-pass output filters, which will save system cost and PCB area.
The EUA2075 also features short-circuit and thermal protection preventing the device from being damaged during a fault condition. The EUA2075 is available in 24-pin SOP and 20-pin 4×4 TQFN package.
Feature
•Wide Supply Voltage: 2.7V to 5.5V
•Unique Modulation Scheme Reduces EMI Emission
•2.8W/ch an 4Ω Load From 5V Supply
•64-Step DC Volume Control
•Headphone Output Function
•Auto Gain Control
•Thermal and Short-Circuit Protection
•Integrated Click and Pop Suppression
•Available in SOP-24 and TQFN-20 Packages
•RoHS Compliant and 100% Lead(Pb)-Free
Halogen-Free
Application
•LCD Monitors/TVs
•All-in-One PCs
•Portable Audio
•Notebook PC
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