Chithunzi cha LT8620EMSE#TRPBF

LT®8620 ndi chowongolera, chochita bwino kwambiri, chothamanga kwambiri cha synchronous monolithic step-down switching regulator chomwe chimavomereza ma voliyumu ambiri ofikira mpaka 65V, ndikugwiritsa ntchito 2.5µAofquiescent yapano.Ma switch amphamvu a Topandbottom amaphatikizidwa ndi zozungulira zonse zofunika kuti achepetse kufunikira kwa zida zakunja.Low ripple Burst Mode imathandizira kuyendetsa bwino kwambiri mpaka mafunde otsika kwambiri ndikusunga zotuluka pansi pa 10mVP-P.Pini ya SYNC imalola kulunzanitsa ku wotchi yakunja.Kulipira kwamkati ndi topology mode yamakono kumathandizira kugwiritsa ntchito ma inductors ang'onoang'ono ndipo kumabweretsa kuyankha kwakanthawi kochepa komanso kukhazikika kwa loop.Pini ya EN/UV ili ndi malire olondola a 1V ndipo atha kugwiritsidwa ntchito kupanga pulogalamuVIN yotsekereza kutsekeka kwamagetsi kapena kutseka LT8620 ndikuchepetsa zolowetsa zomwe zilipo ku 1µA.Capacitor pa pini ya TR/SS imakonza kuchuluka kwa magetsi otulutsa poyambira.Mbendera ya PG imawonetsa pomwe VOUT ili mkati mwa ± 9% yamagetsi opangidwa ndi pulogalamu komanso zovuta.LT8620 imapezeka m'mapaketi ang'onoang'ono a 16-Lead MSOP ndi 3mm × 5mmQFNpackages okhala ndi mapadi owonekera kuti asakane kutentha.

LT8620 ndi monolithic, pafupipafupi, mawonekedwe apano otsika pansi DC/DC converter.Oscillator, yokhala ndi ma frequency okhazikika pogwiritsa ntchito chopinga pa RT pin, imayatsa chosinthira champhamvu chamkati chamkati kumayambiriro kwa wotchi iliyonse.Zomwe zili mu inductor zimawonjezeka mpaka chofananira chapamwamba chapamwamba chikafika ndikuzimitsa chosinthira champhamvu chapamwamba.Chiwongola dzanja chapamwamba chomwe chosinthira chapamwamba chimazimitsidwa chimayendetsedwa ndi voteji pa node yamkati ya VC.Chokulitsa cholakwika chimathandiza VC node poyerekeza voteji pa pini ya VFB yokhala ndi 0.97V yamkati.Kuchulukitsitsa kwaposachedwa kumapangitsa kutsika kwa voliyumu yakuyankha mogwirizana ndi zomwe zimatsogolera chokulitsa cholakwika kuti chikweze VC voltage mpaka pafupifupi inductor yapano ikufanana ndi katundu watsopano.Chosinthira mphamvu chapamwamba chikazimitsidwa, chosinthira champhamvu cholumikizira chimayatsidwa mpaka kuzungulira koloko kotsatira kukayamba kapena kutsika kwamagetsi kutsika mpaka ziro.Ngati kuchulukirachulukira kumapangitsa kuti kupitilira 3.9A kuyendetse posinthira pansi, wotchi yotsatira idzachedwetsedwa mpaka kusintha kwapano kubwererenso pamalo otetezeka.