尽量减少短路电流脉冲的热插拔控制器

摘要：由于内部断路器延迟和有限的MOS栅极下拉电流，许多热插拔控制器不限制在第一个10μs到50μs的电流后，输出短路。结果可以是一个简短的几百安培流动。一个简单的外部电路计数器这个问题，最大限度地减少初始电流尖峰和终止内为200ns至500ns短路。

Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSCIRCUITPROTECTIONHOT-SWAPANDPOWERSWITCHINGCIRCUITSKeywords:hot-swapcontrollers,inrushcurrent,circuitprotection,short-circuitcurrentAug27,2004APPLICATIONNOTE3328MinimizeShort-CircuitCurrentPulseinHot-SwapControllerAbstract:Becauseofinternalcircuit-breakerdelayandlimitedMOS-gatepulldowncurrent,manyhot-swapcontrollersdonotlimitcurrentduringthefirst10sto50sfollowingashortedoutput.Theresultcanbeabriefflowofseveralhundredamperes.Asimpleexternalcircuitcountersthisproblembyminimizingtheinitialcurrentspikeandterminatingtheshortcircuitwithin200nsto500ns.Atypical+12V,6A,hot-swapcontrollercircuit(Figure1)contains(like