jariyuan：
您好:可以考慮用一下我們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.如果覺(jué)得可行,可發(fā)E-MAIL給我.jariyuan@kerrytech.com.cn