Umbane we-LED drive sisiguquli samandla esiguqula umbane ube yi-voltage ethile kunye nombane ukuze iqhube i-LED ukuze ikhuphe ukukhanya. Kwiimeko eziqhelekileyo: igalelo lamandla e-LED drive liquka i-AC yamandla aphezulu (oko kukuthi amandla esixeko), i-DC yamandla aphantsi, i-DC yamandla aphezulu, i-voltage ephantsi kunye ne-voltage ephezulu. I-AC yamandla amaninzi (njengokuphuma kwe-transformer ye-elektroniki), njl.

- Ngokwendlela yokuqhuba:

(1) Uhlobo lwangoku oluhlala luhleli

a. Umbane ophumayo wesekethe ye-drive yangoku eqhubekayo uhlala uhleli, kodwa i-voltage ye-DC ephumayo iyahluka ngaphakathi koluhlu oluthile ngokobukhulu bokumelana nomthwalo. Okukhona ukumelana nomthwalo kuncinci, kokukhona i-voltage ephumayo iphantsi. Okukhona ukumelana nomthwalo kukhulu, kokukhona ukuphuma kombane kuphezulu;

b. Isekethe yamandla angapheliyo ayoyiki i-short-circuit yomthwalo, kodwa akuvumelekanga ngokungqongqo ukuvula umthwalo ngokupheleleyo.

c. Ilungele isekethe yedrive yangoku eqhubekayo ukuqhuba ii-LED, kodwa ixabiso liphezulu kakhulu.

d. Nika ingqalelo kwixabiso eliphezulu lokumelana nomsinga kunye ne-voltage esetyenzisiweyo, nto leyo ethintela inani lee-LED ezisetyenzisiweyo;

(2) Uhlobo olumiselweyo:

a. Xa kumiselwa iiparameter ezahlukeneyo kwisekethe yokulawula i-voltage, i-output voltage ayiguquki, kodwa i-output current iyatshintsha ngokwanda okanye ukwehla komthwalo;

b. Isekethe yokulawula i-voltage ayoyiki ukuvulwa komthwalo, kodwa akuvumelekanga ngokupheleleyo ukukhawulezisa umthwalo ngokupheleleyo.

c. I-LED iqhutywa yisekethe yokuqhuba eyazinzisa i-voltage, kwaye umtya ngamnye kufuneka wongezwe ngokumelana okufanelekileyo ukwenza umtya ngamnye wee-LED ubonise ukukhanya okuqhelekileyo;

d. Ukukhanya kuya kuchaphazeleka kukutshintsha kwevolthi ukusuka ekulungisweni.

–Uhlu lwamandla okuqhuba i-LED:

(3) I-pulse drive

Ii-applications ezininzi ze-LED zifuna imisebenzi yokufiphalisa, efanaIzibane ze-LED ezingasemvaokanye ukukhanya kwezibane zoyilo. Umsebenzi wokufiphala unokufezekiswa ngokulungelelanisa ukukhanya kunye nomahluko we-LED. Ukunciphisa nje amandla ombane wesixhobo kunokukwazi ukulungisaIsibane se-LEDukukhupha i-LED, kodwa ukuvumela i-LED isebenze phantsi kwemeko yokuba iphantsi kunomlinganiselo wamandla ombane kuya kubangela iziphumo ezininzi ezingafunekiyo, ezifana nokuphambuka kwe-chromatic. Enye indlela yokulungisa umbane olula kukudibanisa isilawuli se-pulse width modulation (PWM) kwi-LED driver. Isignali ye-PWM ayisetyenziselwa ngqo ukulawula i-LED, kodwa isetyenziselwa ukulawula iswitshi, njenge-MOSFET, ukubonelela ngombane ofunekayo kwi-LED. Isilawuli se-PWM sidla ngokusebenza kwi-frequency emiselweyo kwaye silungisa ububanzi be-pulse ukuze buhambelane nomjikelo womsebenzi ofunekayo. Uninzi lwee-LED chips zangoku zisebenzisa i-PWM ukulawula ukukhutshwa kokukhanya kwe-LED. Ukuqinisekisa ukuba abantu abayi kuziva bekhanya ngokucacileyo, ukuphindaphinda kwe-PWM pulse kufuneka kube ngaphezulu kwe-100HZ. Inzuzo ephambili yolawulo lwe-PWM kukuba umbane ofiphayo nge-PWM uchaneke ngakumbi, nto leyo enciphisa umahluko wombala xa i-LED ikhupha ukukhanya.

(4) I-AC drive

Ngokwezicelo ezahlukeneyo, ii-AC drives zinokwahlulwa zibe ziintlobo ezintathu: i-buck, i-boost, kunye ne-converter. Umahluko phakathi kwe-AC drive kunye ne-DC drive, ukongeza kwimfuneko yokulungisa nokucoca i-AC engenayo, kukwakho nengxaki yokuzihlukanisa kunye nokungazihlukanisi ngokwembono yokhuseleko.

I-AC input driver isetyenziswa kakhulu kwizibane ezifakelwayo: kwizibane ezilishumi zePAR (Parabolic Aluminium Reflector, isibane esiqhelekileyo esikwinqanaba lobuchwephesha), iibhalbhu eziqhelekileyo, njl.njl., zisebenza kwi-100V, 120V okanye 230V AC Kwisibane seMR16, kufuneka sisebenze phantsi kwe-12V AC input. Ngenxa yeengxaki ezinzima, ezifana nokukwazi ukufiphala kwe-triac eqhelekileyo okanye i-leading edge kunye ne-trailing edge dimmers, kunye nokuhambelana nee-transformers ze-elektroniki (ukusuka kwi-AC line voltage ukuya ekuveliseni i-12V AC yokusebenza kwesibane seMR16). Ingxaki yokusebenza (oko kukuthi, ukusebenza okungena-flicker), ke ngoko, xa kuthelekiswa ne-DC input driver, intsimi ebandakanyekayo kwi-AC input driver inzima ngakumbi.

Umbane we-AC (i-mains drive) usetyenziswa kwi-LED drive, ngokubanzi ngamanyathelo anje ngokunyuka ukuya ezantsi, ukulungiswa, ukucoca, ukuzinzisa i-voltage (okanye ukuzinzisa i-current), njl.njl., ukuguqula amandla e-AC abe ngamandla e-DC, uze emva koko unikezele ngee-LED ezifanelekileyo nge-drive circuit efanelekileyo. I-working current kufuneka ibe nokusebenza kakuhle kokuguqula, ubungakanani obuncinci kunye nexabiso eliphantsi, kwaye kwangaxeshanye isombulule ingxaki yokwahlulwa kokhuseleko. Ukuqwalasela impembelelo kwigridi yamandla, ukuphazamiseka kwe-electromagnetic kunye nemiba yamandla kufuneka isonjululwe. Kwii-LED zamandla aphantsi naphakathi, isakhiwo sesekethe esilungileyo yi-single-end fly back converter circuit; kwizicelo zamandla aphezulu, kufuneka kusetyenziswe i-bridge converter circuit.

–Uhlu lwendawo yokufakelwa kombane:

Amandla okuqhuba angahlulwa abe ngumbane wangaphandle kunye nombane owakhelwe ngaphakathi ngokwendawo yokufakela.

(1) Umbane wangaphandle

Njengoko igama lisitsho, umbane wangaphandle kukufaka umbane ngaphandle. Ngokubanzi, i-voltage iphezulu, nto leyo eyingozi kukhuseleko ebantwini, kwaye kufuneka umbane wangaphandle. Umahluko ngombane owakhelwe ngaphakathi kukuba umbane uneqokobhe, kwaye izibane zasezitalatweni ziqhelekile.

(2) Umbane owakhelwe ngaphakathi

Umbane ufakwe kwisibane. Ngokubanzi, i-voltage iphantsi kakhulu, ukusuka kwi-12v ukuya kwi-24v, nto leyo engabangeli bungozi kukhuseleko ebantwini. Le ixhaphakileyo inezibane zebhalbhu.