jariyuan：
您好:可以考虑用一下我们ALLEGRO的A6260.FeaturesandBenefits▪Automotivegrade▪LEDdrivecurrentupto350mA▪6to40Vsupply▪Reversebatteryprotection▪Lowdrop-outvoltage▪LEDshortcircuitandthermalprotection▪10μAmaximumshutdowncurrent▪PWMdimmingcontrolinput▪CurrentslewratelimitingDescriptionTheA6260isalinear,programmablecurrentregulatorprovidingupto350mAfordrivinghigh-brightnessLEDs.TheLEDcurrent,accurateto4%,issetbyasinglelow-powersenseresistor.DrivingLEDswithconstantcurrentensuressafeoperationwithmaximumpossiblelightoutput.Forautomotiveapplications,optimumperformanceisachievedwhendrivingbetween1and3LEDsatcurrentsupto350mA.ThelowdropoutvoltageoftheA6260allowsasinglewhiteLEDtobedrivensafely,atfullcurrent,withasupplyvoltagedownto6V.AnenableinputallowsPWMdimmingandcanbeusedtoenablelow-currentsleepmode.TherateofchangeofcurrentduringPWMswitchingislimitedtoreduceEMI.OvercurrentdetectionisprovidedtoprotecttheLEDsandtheA6260duringshort-to-supplyorshort-to-groundatanyLEDterminal.TheintegratedtemperaturemonitorcanbeusedtoreducetheLEDdrivecurrentifthechiptemperatureexceedsthethermallimit.Thedeviceisavailableinan8-pinSOICpackagewithexposedthermalpad(suffixLJ).Thedeviceislead(Pb)freewith100%matte-tinleadframeplating.如果觉得可行,可发E-MAIL给我.jariyuan@kerrytech.com.cn