Infineon MA12070P2x30W无滤波器高效音频放大器解决方案

Infineon公司的MA12070P是带I2S数字输入的无滤波器高效+4V到+26V音频放大器.这种超效率音像功率放大器是基于有所有全的多级开关技术,可以用在许多不同的应用领域.多级开关在工作时有非常低的功耗,可使放大器在各种音频产品中满功率时无滤波器配置.MA12070P具有嵌入数字功率管理方案,功率管理算法动态调整开关频率和调制,以优化功耗和EMI.集成的数模转换器(DAC)赋能数字I2S音频流输入.支持的取样频率从44.1 kHz 到192 kHz.器件还提供高度灵活的输出级配置,从表面上看单端输出到单个并行BTL输出.MA12070P的高效率(PMP4)包括小于160mW的空闲功耗,2W的效率大于80%,满功率时的效率大于92%.MA12070P的音频性能(PMP2)包括>101dB DNR (A律, 1% THD+N 功率电平),输出综合噪音(A律)为140μV,高输出时的THD+N为0.007%.器件采用4阶反馈误差控制.连续输出功率为2x30W,峰值输出功率为2x80W.器件的保护功能包括欠压锁住,超温告警/误差,短路/过载保护,功率级引脚本-引脚短路,通过I2C进行到底误差报告,DC保护和I2C控制(四个可选择地址).主要用在电池供电扬声器,无线和坞站扬声器,条形音箱,多房间系统和家庭影院.本文介绍了MA12070P主要特性,应用框图和容量和限制器处理器(VLP)功能框图以及40W开发板KIT_ARDMKR_AMP_40W主要特性与指标,电路图,材料清单和PCB设计图.

The MA12070P is a super-efficient audio poweramplifier based on proprietary multi-level switchingtechnology. It supports a 4-26V supply voltage range,allowing it to be 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.

The MA12070P features an embedded digital powermanagement scheme. The power managementalgorithm dynamically adjusts switching frequency andmodulation to optimize power loss and EMI across theoutput power range.

An integrated digital-to-analog converter enablesdigital I2S audio stream input. It supports sample ratesfrom 44.1 kHz to 192 kHz.

Highly flexible output stage configurations are offered,ranging from four single-ended outputs to a singleparallel-BTL output.