摘要：电流控制电路在低电压的LED系统的修改，允许使用的一个切碎供应电压调节LED亮度。该电路防止浪涌电流期间关闭的时间间隔，当电源电压关闭的LED去耦电容。
Maxim>AppNotes>DisplayDriversLEDLightingOptoelectronicsKeywords:LEDs,LEDdrivers,LEDcurrentregulators,choppedsupplyvoltage,inrushcurrent,decouplingcapacitorsMar09,2011APPLICATIONNOTE4977SimpleDetectionCircuitLowersStressonLEDDriverwithPower-LineDimmingBy:FonsJanssenAbstract:Amodificationofthecurrent-controlcircuitinalow-voltageLEDsystemallowsuseofachoppedsupplyvoltagetomodulatetheLEDintensity.ThecircuitpreventsinrushcurrenttothedecouplingcapacitorsbyturningofftheLEDsduringintervalswhenthesupplyvoltageisoff.AsimilarversionofthisarticleappearedintheSeptember23,2010issueofElectronicDesignmagazine.Inlow-voltage(24V)lightingsystems,theoff-linepowersuppliescanoftenbel
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