• [ CXAR41171 ]

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1.产品概述       2.产品特点     82p嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）82p嘉泰姆

5.产品封装       6.电路原理图  82p嘉泰姆

7.相关产品82p嘉泰姆

   产品概述 返回TOP82p嘉泰姆

       CXAR41171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，CXAR41171 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，CXAR41171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，CXAR41171是能输出悦耳音调的音频功率放大器。CXAR41171的放大音量是允许由外部各音源独立控制的。CXAR41171采用TDFN以及WCSP封装。The CXAR41171 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, CXAR41171 is capable of driving 4Ω speaker load at a continuous average output of 3W/10% THD+N or 2W/1% THD+N. The CXAR41171 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 CXAR41171. The gain of CXAR41171 is externally configurable which allows independent gain control from multiple sources by summing signals from separate sources. The CXAR41171 is available in space-saving WCSP and TDFN packages.

   产品特点 返回TOP82p嘉泰姆

• 单一调变方案来减少EMI干扰82p嘉泰姆

• 工作电压3.6V,负载8Ω的扬声器:82p嘉泰姆

- 输出功率400mW时，效率高达88%82p嘉泰姆

- 输出功率100mW时，效率高达80%82p嘉泰姆

• 静态电流 2.4mA，关断电流0.5uA82p嘉泰姆

• 工作电压2.5 V至5.5 V82p嘉泰姆

• 采用优化的PWM输出架构，无需输出LC滤波器82p嘉泰姆

• 高PSRR(-72dB)，无需稳压器82p嘉泰姆

• 全差动设计用以抑制射频干扰，无需旁通电容82p嘉泰姆

• 高CMRR，输入无需耦合电容器82p嘉泰姆

• 内部工作频率250kHz82p嘉泰姆

• 内含POP 及Click噪音抑制电路82p嘉泰姆

• 1.5mmx1.5mm WCSP 及 3mmx3mm TDFN-8 封装82p嘉泰姆

• 符合RoHS规范及Pb-Free82p嘉泰姆

Unique Modulation Scheme Reduces EMI Emissions82p嘉泰姆

Efficiency at 3.6V With an 8-Ω Speaker:82p嘉泰姆

− 88% at 400 mW82p嘉泰姆

− 80% at 100 mW82p嘉泰姆

 Low 2.4-mA Quiescent Current and82p嘉泰姆

0.5-μA Shutdown Current82p嘉泰姆

2.5V to 5.5V Wide Supply Voltage82p嘉泰姆

Shutdown Pin Compatible with 1.8V Logic GPIO82p嘉泰姆

Optimized PWM Output Stage Eliminates82p嘉泰姆

LC Output Filter82p嘉泰姆

 Improved PSRR (−72 dB) Eliminates Need for a82p嘉泰姆

Voltage Regulator82p嘉泰姆

 Fully Differential Design Reduces RF Rectification82p嘉泰姆

and Eliminates Bypass Capacitor82p嘉泰姆

 Improved CMRR Eliminates Two Input82p嘉泰姆

Coupling Capacitors82p嘉泰姆

 Internally Generated 250-kHz Switching82p嘉泰姆

Frequency82p嘉泰姆

 Integrated Pop and Click Suppression Circuitry82p嘉泰姆

 1.5mm× 1.5mm Wafer Chip Scale Package (WCSP)82p嘉泰姆

and 3mm× 3mm TDFN-8 package82p嘉泰姆

 RoHS compliant and 100% lead(Pb)-free82p嘉泰姆

   应用范围 返回TOP82p嘉泰姆

• 无线或移动电话和PDA应用82p嘉泰姆

Ideal for Wireless or cellular Handsets and PDAs82p嘉泰姆

   技术规格书（产品PDF) 返回TOP 82p嘉泰姆

     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！82p嘉泰姆

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产品封装图 返回TOP82p嘉泰姆

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电路原理图 返回TOP82p嘉泰姆

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◀ 上一篇:CXAR41170高效率每个通道2.5W功率输出的双声道D类音频放大器低噪声filterless PWM的架构无需输出滤波器在输出负载为4Ω的扬声器上单一通道可以输送出2.5W/10%的输出功率及失真度

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下一篇▶:CXAR41172高效率的单声道全桥式驱动D类音频放大器在输出负载为8Ω的扬声器上输送出6.5W/10%的输出功率及失真度全差动输入设计比起单端输入更能有效抑制噪声独特调变方案来减少EMI干扰

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