非隔离式DC -DC转换器的布局考量

摘要：DC-DC转换器的电场和磁场的极好来源。他们的EMI频谱开始在开关频率和经常超过100MHz的扩展。在印刷电路板（PCB）布局，以尽量减少电容式联轴器和磁性联轴器护理必须行使。电路的寄生电容和寄生电感，必须进行评估，因此，早在设计阶段可适当权衡。

Maxim>AppNotes>AUTOMOTIVEGENERALENGINEERINGTOPICSPOWER-SUPPLYCIRCUITSPROTOTYPINGANDPCBOARDLAYOUTKeywords:printedcircuitboard,PCBlayout,parasiticinductance,parasiticcapacitance,EMI,DC-DC,dcdc,Mar01,2001converters,convertors,groundplane,groundloopAPPLICATIONNOTE735LayoutConsiderationsforNon-IsolatedDC-DCConvertersAbstract:DC-DCconvertersareanexcellentsourceofelectricfieldsandmagneticfields.TheirEMIspectrumbeginsattheswitchingfrequencyandoftenextendsover100MHz.Tominimizecapacitivecouplingsandmagneticcouplingscaremustbeexercisedinprintedcircuitboard(PCB)layout.Parasiticcapacitanceandparasiticinductanceofthecircuitmustbeevaluatedsothatthepropertrade-offcanbemadeearl