EUA2045-无破音、低EMI、单声道D类音频放大器  DataSheet
概述
EUA2045单声道、无破音、低EMI、2.8W、无需滤波器的D类音频功率放大器不仅具有D类的84%高效率，还有独特的无破音功能，可以通过检测输出的破音失真，自动调整系统增益，不仅有效避免了大功率超载输出对喇叭的损坏，同时带来舒适的听觉感受。EUA2045采用9焊球WCSP和8 PIN TDFN封装。
特点 ‧2.5V到5.5V操作
‧为4Ω负载提供2.8W功率输出
‧低EMI
‧无破音功能
‧短路保护及短路结束自动回复功能
‧过热保护
‧84%的效率
‧低静态电流(3.5mA)与低功耗关断模式(0.5μA)
‧POP杂音抑制
‧WCSP-9 与TDFN-8封装
应用
‧行动电话
‧个人媒体播放器
‧掌上游戏机
EUA2045-Non-Clip, Low EMI, 2.8W Mono Filterless Class-D Audio Power Amplifier with Auto-Recovery
Description
The EUA2045 is a high efficiency, 2.8W mono class-D audio power amplifier with non-clip. 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, EUA2045 is capable of driving 4Ω speaker load at a continuous average output of 2.8W/10% THD+N or 2.2W/1% THD+N. The EUA2045 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 84%.
EUA2045 feature non-clip output control function which detects output signal clip due to the over level input signal and suppress the output signal clip automatically. Also the non-clip output control function can adapt the output clip cause by power supply voltage down with battery.
In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the EUA2045.
The EUA2045 is available in space-saving WCSP and TDFN-8 packages.
Feature
‧Unique Modulation Scheme Reduces EMI Emissions
‧Unique Non-Clip function , Variable NCN1, NCN2,NCNOFF mode
‧Short Circuit Auto-Recovery
‧Efficiency at 3.6V With an 8-Ω Speaker:
- 84% at 400 mW
‧Low Quiescent Current and 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 ( -68 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 325-kHz Switching Frequency
‧Integrated Pop and Click Suppression Circuitry
‧1.5mm 1.5mm Wafer Chip Scale Package (WCSP) and 3mm 3mm TDFN-8 Package
‧RoHS Compliant and 100% Lead(Pb)-Free Halogen-Free
Application
‧Ideal for Wireless or cellular Handsets and PDAs |