通常，导致电磁噪声和开关振铃的是开关稳压器热回路中的高di/dt和寄生电感。当电路开关时，开关节点波形就会出现明显的振荡，这就是一项产生EMI的因素。单纯减少该噪声也并不难，传统方式是减慢MOSFET开关边缘速率，通过减慢内部开关驱动器或从外部添加缓冲器就可以实现。但这会导致新的问题，由于增加了开关损耗，转换器的效率会降低。因此要想有效减少EMI并改进功能，需要尽量减少电流回路的辐射效应。黄庆义解析，普通的电源是单个电流回路，Silent Switcher采用两个对称分布的输入热回路。根据右手定则，这两个回路产生磁场方向相反，能量相互抵消，从而电气回路对外没有净磁场。因此，Silent Switcher器件无需减慢开关边缘速率，这解决了EMI和效率之间的权衡问题。库存产品型号，供应原装ADI现货电子元器件，用芯制造，用心服务。AD5318BRUZ一片起售 集成电路
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