USombulula njani iVoltage yeeModyuli zoMthombo wokuKhanya we-LED ziPhantsi kakhulu

Uluhlu olutshintshayo lwe-VF yesibane sesibane se-LED aluqwalaselwa, olukhokelela ekusebenzeni okuphantsi kwesibane, kunye nomthwalo wexabiso lemodyuli yomthombo wokukhanya we-LED kwimodyuli yomthombo wokukhanya we-LED engazinzanga. Ngokuqhelekileyo yenziwe ngeentambo ezininzi ze-LED zee-LED. ubungakanani. I-VF ye-LED iyatshintsha ngokutshintsha kobushushu. Ngokubanzi, ngokuqhubekayo, i-VF iyancipha kwiqondo lokushisa eliphezulu, kwaye i-VF iba phezulu kwiqondo eliphantsi. Ngoko ke, i-voltage esebenzayo yomthwalo wezibane ze-LED kwiqondo lokushisa eliphezulu lihambelana ne-VOL, kunye ne-LED yesibane somthwalo we-voltage yokusebenza kwiqondo lokushisa eliphantsi lihambelana ne-VOH. Xa ukhetha i-drive ye-LED, uluhlu lwe-voltage yemveliso yomqhubi inkulu kune-VOL VOH. Ukuba ixabiso lemodyuli yomthombo wokukhanya kwe-LED kwi-voltage enkulu yokuphuma iphantsi kune-VOH, ukunyamezela kwesibane kwiqondo lokushisa eliphantsi akunakufikelela kumandla okwenene. Ukuba i-drive ye-LED ekhethiweyo kwi-voltage ephantsi iphezulu kune-VOL, i-drive inokuqhutywa kwiqondo lokushisa eliphezulu kwiqondo lokushisa eliphezulu. Imveliso idlula ububanzi bokusebenza, umsebenzi awuzinzile, izibane ziya kukhanya, njl. Kodwa iindleko ezibanzi kunye nokuqwalaselwa ngokufanelekileyo, awukwazi ukulandela ngokungaboniyo uluhlu lwe-LED yoluhlu lwe-ultra-wide output voltage: kuba i-voltage yomqhubi ikuluhlu oluthile kuphela, ukusebenza kakuhle kwe-drive kokona kusebenza kakuhle. Emva kokugqithisa uluhlu, ukusebenza kakuhle kunye namandla (PF) kuya kuhla. Ngexesha elifanayo, uyilo loluhlu lwe-voltage ye-output yomqhubi lubanzi kakhulu, oluya kukhokelela ekunyuseni kweendleko kunye nokusebenza kakuhle akunakulungiswa. Ukuba ibhalansi yamandla kunye neemfuno zokunciphisa aziqwalaselwa, amandla okubizwa kwe-LED drive abhekisela kwidatha elinganiswe ngokusingqongileyo okulinganiselwe kunye nombane olinganisiweyo. Ukuthathela ingqalelo ukuba abathengi abahlukeneyo baya kuba nezicelo ezahlukeneyo, uninzi lwababoneleli nge-LED drive baya kubonelela ngegophe lokunciphisa amandla kwiinkcukacha zabo zemveliso (umthwalo oqhelekileyo we-VS i-ambient i-ambient drop drop curve kunye nomthwalo we-VS igalelo lokunciphisa umbane we-curve)). Ijika elibomvu libonisa ukuba xa ixabiso lemodyuli yomthombo wokukhanya kwe-LED ifaka i-120VAC, i-curve yokunciphisa amandla kunye nokutshintsha kweqondo lokushisa. Xa ubushushu be-ambient bungaphantsi kwe-50 C, umqhubi uvumela imithwalo epheleleyo eyi-100. Xa ubushushu be-ambient buphezulu ukuya kuma-70 C, umqhubi unokunciphisa umthwalo ukuya kuma-60%. Xa ubushushu be-ambient butshintsha phakathi kwe-50-70 C, umthwalo we-drive we-drive kunye neqondo lokushisa kunye neqondo lokushisa kunye neqondo lokushisa Ukunyuka kunye nokuhla komgca. Ijika elihlaza okwesibhakabhaka libonisa ukuba xa umqhubi we-LED engena kwi-230VAC okanye i-277VAC, umthwalo wayo unomlinganiselo wokunciphisa amandla kunye noshintsho kwiqondo lokushisa eliphantsi. Ijika elihlaza okwesibhakabhaka lithetha ukuba xa umqhubi we-LED ngu-55 C, i-curve yokunciphisa amandla ephumayo kunye neenguqu kwiinguqu zegalelo lombane. Xa i-voltage yegalelo i-140VAC, umthwalo womqhubi uvumela i-100 imithwalo epheleleyo, kwaye njengoko i-voltage input iyancipha; ukuba amandla aphumayo ahlala engatshintshi, igalelo langoku liya kunyuka, kubangele ukwanda kokulahlekelwa kwegalelo ekupheleni, ukusebenza kuncipha, ukushisa kwesixhobo kuya kuphakama, amanqaku okushisa ngamnye anokwenzeka. Imigangatho egqithisileyo inokubangela ukuba izixhobo zingasebenzi. Ngoko ke, xa i-voltage yegalelo ingaphantsi kwe-140VAC, umthwalo ophumayo womqhubi kufuneka uncitshiswe nge-voltage input kunye nokunciphisa umgca. Emva kokuqonda igophe eliphezulu lokunciphisa kunye neemfuno ezihambelanayo, xa ukhetha ixabiso lemodyuli yomthombo wokukhanya kwe-LED, kufuneka uqwalasele ngokubanzi kwaye ukhethe ngokuhambelana nobushushu bendalo kunye neemeko zegalelo lombane, kwaye ushiye ngokufanelekileyo ukushiya ukuncitshiswa kokunciphisa. ukucuthwa kwesixa-mali sokucuthwa.