标签: 灯设

LED闪光灯设计LEDsforStrobeLightsApplicationNoteIntroductionOften,thelightavailablefortakingaphotographisinsufficient,requiringtheuseofaflashunitasanadditionallightsource.Traditionalflashunitsconsistofaflashtubeinwhichaflashiscreatedbymeansofagasdischarge.Theflashtubecontainsaninertgas,usuallyxenonorkrypton.Usingasuitablecircuitthebatterychargesacapacitortoalevelofafewhundredvolts,whichisthensteppeduptoasecondaryvoltageinthekVrangebymeansofanignitioncoil.Thisignitionvoltageisreleasedintheflashtube,causingthegastoionize.Theflasharisesthroughrecombination,andlastsafewmilliseconds.Duringthistime,afewhundredAmperesofcurrentflow.Thelightemittedfromtheflashtubeexhibitsacon……