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ADI SSM35822x31.76 W数字输入无滤波器D类放大器解决方案

ADI公司的SSM3582是2x31.76 W高效数字输入无滤波器立体声D类放大器,可以工作在单电源,仅需要很少的外接元件,从而大大降低了电路的材料清单.器件采用扩频Σ-Δ调制,能直接和扬声器连接,和其它D类架构相比,保证了最好的模拟性能而同时降低了电磁辐射,可选择超低电磁干扰(EMI)模式,大大降低了100MHz以上的辐射,从而可以使用更长的扬声器电缆.放大器具有杰出的模拟性能,信噪比为106dB,总失真+噪音(THD+N)为0.004%. SSM3582A工作电压为单电源4.5 V 到16 V ,能向8 Ω 和4 Ω负载以小于1% THD提供2x15W rms连续功率.功率效率8 Ω负载为93.8%,4 Ω负载为90.6%.脉码调制(PCM)音频串口支持大多数协议如I2S,左侧调整, 时分复接(TDM),以及单个接口上寻址多达16个器件,多达32个音频播放通路.器件具有短路保护,欠压保护和热保护.主要用在移动计算,全合一计算机,手持电子学,无线扬声器和电视机.本文介绍了SSM3582主要特性,功能框图和立体声和单声道放大器应用电路,以及评估板EVAL-SSM3582Z主要特性,框图,电路图,材料清单和PCB设计图.

The SSM3582A is a fully integrated, high efficiency, digital input stereo Class-D audio amplifier. The device can operate from a single supply and requires only a few external components, significantly reducing the circuit bill of materials.

A proprietary, spread spectrum Σ-Δ modulation scheme enables direct connection to the speaker and ensures state-of-the-art analog performance while lowering radiated emissions compared to other Class-D architectures. An optional ultralow electromagnetic interference (EMI) mode significantly reduces radiated emissions above 100 MHz, enabling longer speaker cable lengths. Audio is transmitted digitally to the amplifier,

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