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, minimizing the possibility of signal corruption in digital environments. The amplifier provides outstanding analog performance, with a 106 dB signal-to-noise ratio and a low 0.004% total harmonic distortion + noise (THD + N).
The SSM3582A operates from a single 4.5 V to 16 V supply and is capable of delivering 2× 15 W rms continuously into 8 Ω and 4 Ω loads at <1% total harmonic distortion (THD). The efficient modulation scheme maintains excellent power efficiency ove...