74FCT3807DQGI8 ic cihp isekethe edibeneyo ye-elektroniki eshushu ithengisa entsha kunye neyoqobo indawo enye kuphela yokuthenga inkonzo ye-bom

1.I-LED luhlobo olutsha lwesixhobo somthombo wokukhanya we-semiconductor osebenza kakuhle kakhulu kunye nokusingqongileyo.Xa kuthelekiswa neminye imithombo yokukhanya, i-LED ineenzuzo ezinkulu ekukhanyeni kweemoto kwaye inethemba elibanzi lesicelo.Iindlela ezahlukeneyo zokudibanisa ii-LED kuthotho kunye nokuhambelana ukwenza ii-array ze-LED zisetyenziselwa ukuhlangabezana neemfuno zokukhanya kwemoto.

Ngokuphuculwa kobugcisa kunye nophuhliso olukhawulezayo loqoqosho lwentlalo, iimveliso ze-LED zisetyenziswe ngokubanzi ebomini babantu.Inkulungwane ye-21, imveliso ye-LED kunye nomlinganiselo weemarike ufikelele kwinqanaba elingakaze libonwe ngaphambili, eyona nto ibalulekileyo ye-market application ye-LED yindawo ehlukeneyo yokubonisa, iintlobo ezahlukeneyo zeefowuni eziphathwayo, njalo njalo.Ukongeza, ii-LED zidlala indima ebalulekileyo ezindleleni, ukukhanya kwezakhiwo, ukuhombisa kwangaphakathi, kunye nezinye iindawo ezininzi.Ngophuhliso olukhawulezayo lweshishini leemoto, iisekethe zomqhubi we-LED ziye zasetyenziswa ngokubanzi kwi-elektroniki yemoto yanamhlanje, kunye nemithombo yokukhanya yemoto yangaphambili efana nezibane zangaphambili ngokuthe ngcembe zitshintshwa zizo.Kwangaxeshanye, i-LED inokukhanya okuphezulu okukhanyayo, ixesha lokuphendula elifutshane (impendulo ekhawulezayo), ulwakhiwo oludityanisiweyo (ubungakanani obuncinci), ubomi benkonzo ende, kunye nezinye iimpawu, iya kusetyenziswa kwizibane zemoto kwaye inocalucalulo oluqinileyo lombala kunye nokuchasa. -iimpawu zokubengezela.Nangona kunjalo, ngenxa yokusikelwa umda kwezinto ezahlukeneyo, i-LED iseneziphene ezithile, kufuneka iqhubeke nokuphucula itekhnoloji ye-LED, ukufezekisa ngcono iimfuno zombane weemoto.

2.I-LED sisixhobo se-semiconductor esikhupha ukukhanya, esenziwe ngee-semiconductors ezithile ezihlanganisiweyo.I-LED ngumthombo wokukhanya kunye nokumelana kakuhle nokungcangcazela kunye nokothuka, ikhuselwe yi-epoxy resin cap, i-core incinci kakhulu, kwaye i-core yi-PN junction core, ngoko ineempawu ze-PN junction, okt conduction phambili. , i-reverse cut-off kunye ne-overvoltage breakdown, njl. Kwiimeko ezithile ezikhethekileyo Ngaphantsi kweemeko ezithile ezikhethekileyo, inokuphinda ibonakaliswe njenge-emitter yokukhanya.

3.Iisekethe ze-LED ze-drive zohlulwe zibe ziintlobo ezimbini zokuqhuba: i-voltage eqhubekayo kunye ne-drive yangoku.Ngenxa yohlobo lokuqhuba oluqhubekayo lwangoku lwe-LED, kulwakhiwo lwe-PN junction-based, lunokuba lubudlelwane obucacileyo ukumela umbane we-LED kunye notshintsho lwangoku, ngoko ke lusetyenziswa ngokubanzi.Indlela yokuqhuba i-voltage rhoqo kukusetyenziswa kwe-resissive capacitance step-down okanye i-transformer step-down filtering, ukusetyenziswa kwe-voltage regulator diode okanye indlela yokuhambisa umbane, ukuya kumbane we-LED, kodwa iimpawu zokukhanya kwe-LED ziya kuba ngoku. iguquka rhoqo phantsi kwempembelelo ehambelanayo.Umlawuli womgca kwindlela yokuqhuba yangoku eneentlobo ezimbini: i-parallel kunye ne-series, i-core yi-triode yamandla okanye i-MOSFET esebenza kwi-linear zone njenge-resistor eguquguqukayo eguquguqukayo ukulawula umthwalo.i-voltage kunye nekhoyo kuzo zombini iziphelo ze-LED azikho ubudlelwane bomgca, ayinakunikwa amandla ngokuthe ngqo ngumthombo we-voltage, kwaye kufuneka inqunyelwe ngokukhawulela okwangoku ukuthintela ukugqithisa ngoku kunye nokuphepha umonakalo kwi-LED.I-LED ekhanyayo kunye ne-current ayikho I-flux ekhanyayo ayilingani nangoku, i-flux ekhanyayo iyanda kunye ne-current, ithwala idigri ezahlukeneyo zamandla ombane, ukuchasana kwangaphakathi, kunye nezithintelo ezinokubakho azifani, ngoko azikwazi ukusetyenziswa. ngokuthe ngqo ngokuhambelana.Khetha imowudi echanekileyo nefanelekileyo yokuqhuba kufuneka ithathele ingqalelo isicelo kunye nengqiqo yayo yokusebenza, kuyo nayiphi na indlela, kufuneka ukhethe kwimowudi yokulawula unikezelo lwamandla, isicelo esixhaphake kakhulu yiPFM, imo ye-PWM, kunye nolawulo lwefilimu yesilayidi, leyo. ilula kwaye iguquguqukayo yendlela yokulawula i-PWM, inokugcina i-frequency ezinzileyo ekusebenzeni, kodwa kwakhona kufuneka ithathelwe ingqalelo ukusuka kwindawo yokugcina amandla kunye nezinye izikhokelo, ukuphucula ukukhanya kwe-LED kwangoko, kunye nokunciphisa ukusetyenziswa kwamandla e-LED.