Infineon MA12070无滤波器高效60W音频放大器解决方案

Infineon公司的MA12070是模拟输入无滤波器高效4V到26V的音频放大器,采用专有的多级开关技术,支持4-26V电源范围,可以用在多个领域.多级开关技术在工作时具有很低的功率损耗.在广泛的音频产品中满额功率时可用在无滤波器的配置.MA12070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,以优化输出功率范围内的功率损耗和EMI.4阶反馈回路保证了低失真和高的PSRR.器件还提供高度灵活输出级配置,范围从单端输出到单个并行BTL输出.MA12070的保护特性包括DC,短路,超温和欠压状态.MA12070的空闲功耗小于160mW,输出2W时的效率大于80%(1kHz 正弦 8Ω),满功率时的效率大于91%(1kHz 正弦 8Ω).音频性能的DNR大于110dB(A-w, rel. to 1% THD+N powerlevel),输出综合噪音(A律)为45μV,高输电平时的THD+N为0.004%.连续输出功率2x30W,峰值输出功率2x80W.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MA12070主要特性,应用框图以及评估板DEMO_BASSAMP_60W_MA12070主要特性和指标,经典美国电子管贝斯放大器和MA12070贝斯放大器拓扑图以及评估板电路图,材料清单和PCB设计图.

The MA12070 is a super-efficient audio power amplifierbased on proprietary multi-level switching technology.It supports a 4-26V 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.

The MA12070 features an embedded digital powermanagement scheme. The power managementalgorithm dynamically adjusts switching frequency andmodulation to optimize power loss and EMI across theoutput power range.

A 4th order feedback loop ensures low distortion and ahigh PSRR.

The MA12070 operates from a single power stagesupply voltage (PVDD) and a +5V system supply voltage(DVDD, AVDD).

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

The MA12070 features protection against DC, shortcircuits,ove...