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MVME2604-1131B
而采用开关稳压器又产生了新的挑战。由于电感器要求使用额外的区域,因此开关稳压器形状因数较大。考虑稳压器开关频率与测量信号频率之间的关系。
因此,转换器的布局更加关键。设计不良的开关稳压器会提高本底噪声,并产生不必要的电磁兼容性(EMC),将会干扰小型信号的检测。
幸运的是,我们目前提供了集成电感器DC/DC开关稳压器,可以大限度地减少此类挑战。电感器的集成不仅减小了开关节点的面积,还可以更轻松地实现佳布局。新型DC/DC转换器的开关频率显著提高,因此可以使用小型片式电感器和陶瓷电容器,使得DC/DC转换器成为外形小的选择。
新型LMZM23601电源模块将DC/DC转换器、电感器、Vcc滤波电容器和升压电容器集成到一个3mm*3.8mm*1.6mm的封装中。这样可以处理高36V的输入电压,并将电压从15V降至2.5V(固定5V和3.3V可选),同时输出电流高达1A。如图1所示,占用小的板内空间实现完整的1A解决方案。
MVME2604-1131B
MVME2604-1131B
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