电力线瞬变保护系列

摘要：本应用笔记描述了一个电路，针对高，低电压保护的N沟道功率MOSFET。它包括一个高侧开关驱动器IC和快速反应，3个晶体管，过电压检测器。

Maxim>AppNotes>CIRCUITPROTECTIONKeywords:seriesprotection,powerswitch,powerMOSFET,transientprotectionMar23,2005APPLICATIONNOTE3472SeriesProtectionforPower-LineTransientsAbstract:Thisapplicationnotedescribesacircuitthatprotectsann-channelpowerMOSFETagainstlowandhighvoltages.Itincludesahigh-sideswitch-driverICandfast-response,3-transistor,overvoltagedetector.Voltagetransientsfoundonlow-voltagepowerlinescansometimesattainamplitudesmanytimesthenominalvoltagelevel.Thoseoccurrencescreatetheneedforprotectionagainsttheapplicationofimproperpowerlevels.Theusualwaytoprotectsensitivecircuitryagainstovervoltageistoaddparallelclampswhosehighenergy-absorptioncapabilityis