Ngenxa yeempawu zexabiso le-VF zeii-LEDs, amanye amaxabiso e-VF aya kutshintsha kunye nobushushu kunye nekhoyo ngoku, ngokuqhelekileyo ayifanelekanga ukuyila ngokuhambelanayo.Nangona kunjalo, kwezinye iimeko, kufuneka sisombulule ingxaki yokuqhuba iindleko zee-LED ezininzi ngokufanayo.Olu yilo lunokusetyenziswa kwireferensi.

Qaphela ukuba ixabiso le-VF kufuneka lahlulwe libe ngamabakala.Ii-LED ezinexabiso elifanayo le-VF kufuneka zisetyenziswe kwimveliso efanayo kangangoko kunokwenzeka.Imveliso inokuqinisekisa ukuba imposiso yangoku ingaphakathi kwe-1mA kwaye i-LED ikwimeko engaguqukiyo yangoku.

Ukusebenzisa i-triodes edibeneyo inokugcina i-current ngayinyeI-LED iyahambelana.Ezi triodes ziveliswa phantsi kwemekobume yobushushu efanayo kunye neemeko zenkqubo efanayo β Ixabiso elifanayo linokuqinisekisa ukuba umsinga ngamnye uyafana.Inxalenye yangoku eqhubekayo inokuqulunqwa ngolu hlobo xa iimfuno zingekho phezulu kakhulu.Umbane ozinzileyo okanye ixabiso lamandla ombane e-PWM elizinzileyo liqhuba i-voltage ezinzileyo ye-triode bias ukuphumeza isiseko sangoku esingaguqukiyo.

Ukusebenzisa i-IC ngokuchaneka okuphezulu njengomthombo wesalathiso wangoku, i-R inokuseta i-IC output current.Emva kokuba ixabiso le-R elichasayo lichongiwe, linokuthi litshintshwe ngochaso olusisigxina.Ukusetyenziswa kwezixhobo ezidityanisiweyo ezininzi ze-triode kunokunciphisa ukusetyenziswa kwe-IC, ngoko ukunciphisa iindleko zeemveliso zokuyila.

I-linear high-power LED imveliso eqhubekayo yangoku inokusetyenziswa ngokuhambelanayo.Kuyilo lwemveliso, kaninzi asikwazi ukufumana i-IC yokuqhuba nge-current enkulu.Ngokubanzi, kunqabile ukubona i-IC enegama elingu-2A okanye ngaphezulu, kwaye i-IC enegama elingu-2A ayinakusetyenziswa kumda.Isizathu seendleko zenkqubo ye-IC enkulu kune-1a kukuba iibhubhu ze-MOS zingaphandle, kwaye isiphaluka setyhubhu ye-MOS yangaphandle iyinkimbinkimbi kwaye ukuthembeka kuyancipha.Ukusebenza ngokuhambelanayo yindlela yoyilo esebenzayo.

Uyilo lwesalathiso oluhambelanayo lwe-Dd312 lwamkelwa ukuqhuba ngokuthe ngqo ii-6wled ezintathu.Ukunika amandla imiqondiso yolawulo lwe-PWM kufuna ukubekwa wedwa okufanelekileyo ukuphepha ukuphazamisana kunye neengxaki zokuqhuba.I-voltage evumela i-en kufuneka ihlangabezane neemfuno zenkcazo, kwaye ingonakalisi isikhonkwane se-EN siphezulu kakhulu.Ngokubanzi, i-IC ukumelana nombane ibhekisa kumthwalo kunye nonikezelo lwamandla.Ukuba akukho nto ibonisa amandla ombane wokuvuselela, nceda ungadluli kuyilo lwe-5V.

Kuba olu hlobo lobhaqo, iI-LED rhoqoidrive yangoku IC kwelinye icala le-LED inokuphinda iyilwe kwaye iqhutywe ngokuhambelanayo.Enyanisweni, i-IC isebenza yodwa kwaye ekugqibeleni isebenza kunye ngokufanayo.Imowudi ye-DC-DC isebenza kwi-frequency ephezulu.Kufuneka kuqatshelwe ukuba ubeko lwePCB kufuneka luphephe uyilo olunqamlezayo.Isihluzi esifanelekileyo kunye ne-bypass capacitors kufuneka isondele kwi-IC, kwaye umthwalo wangoku uya kudibaniswa ekugqibeleni.