应对供电线路故障的理想二极管保护电路

Highavailabilitysystemsoftenemploydualfeedpowerdistributiontoachieveredundancyandenhancesystemreliability.ORingdiodesjointhefeedstogetheratthepointofload,mostoftenusingSchottkydiodesforlowloss.MOSFET-basedidealdiodescanbeusedtoreplaceSchottkydiodesforasignificantreductioninpowerdissipation,simplifyingthethermallayoutandimprovingsystemefficiency.Figure1showstheLTC4355andLTC4354combiningtheinputsandreturnsina–48V,5Adualfeedapplication.Thissolutionreducesthepowerdissipationfrom6WusingSchottkydiodestojust1.1WwithMOSFETs.IdealDiodesProtectAgainstPowerSupplyWiringErrorsDesignNote444MeilissaLumIntroductionsucherrors.WiringerrorscouldincludereversepolarityHighavailabilitysystemsoftenemploydualfeedpowerorcross-feedconnections.Knowingthis,circuitdesign-distributiontoachieveredundancyandenhancesystemersareaccustomedtousingdiscretediodesolutionstoreliability.ORingdiodesjointhefeedstogetherattheprotectagainstsuchmishaps.Itisimportantthatactivepointofload,mostoftenusingSchottkydiodesforlow