[原创] Infineon MA12040无滤波器高效音频放大器解决方案

Infineon公司的MA12040是基于专有的多级开关技术的无滤波器高效音频功率放大器,支持宽工作电压,工作电压+4V到+18V(PVDD)和+5V(A/DVDD),允许使用在许多差分应用中.多级开关技术在工作时有非常低的功耗.MA12040具有嵌入数字管理方案,功率管理算法大大地调整开关频率和调制,以优化功率损耗和输出功率范围内的EMI,其4阶反馈回路保证了低失真和高PSRR.MA12040具有对DC,短路,超温和欠压状态的保护功能.18V PVDD时的空闲功耗小于100mW,1W时的效率大于79%(1kHz sine, 8Ω),满功率时的效率大于92%(1kHz sine, 8Ω),DNR大于107dB(A-w,rel.to 1% THD+N powerlevel),55μV输出综合噪音(A-w),高输出电平时的THD+N为0.003%.可选择的增益为(20dB/26dB),2x40W峰值输出功率(18V PVDD, RL = 4Ω,10% THD+N level),2x20W连续输出功率(RL = 8Ω at 18V,PMP4, 10% THD+N level,无散热器).主要用在电池工作的扬声器,无西南和坞站扬声器,多房间系统,家庭影院和条形音响.本文介绍了MA12040主要特性,典型应用框图,MA12040参考板主要特性,电路图,材料清单和PCB设计图.

The MA12040 is a super-efficient audio power amplifierbased on proprietary multi-level switching technology.It supports a wide supply voltage range, allowing it tobe used in many different applications.

Multi-level switching enables very low power lossduring operation. In addition, it allows the amplifier tobe used in filterless configurations at full rated powerin a wide range of audio products.
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