Iyini I-Voltage Yamandla e-LED kanye Nomjikelezo Wawo Wokushayela Okuyisisekelo?

Ukunikezwa kwamandla kagesi kwangempela kwe-LED kunezinhlobo ezintathu ezibalulekile: amabhethri aphansi-voltage, amaseli elanga, kanye nokunikezwa kwamandla emakethe yezokuxhumana. Kungakhathaliseki ukuthi yikuphi ukunikezwa kwamandla kwangempela okwamukelwe, imfuneko yoshintsho lwamandla ukuze yaneliseke nge-LED. Lolu hlobo lwesekethe yokuguqula amandla ngokuvamile lusho isekethe yedrayivu ye-LED. Kuhlelo lokunikezwa kwamandla elanga le-LED, amabhethri noma ama-ultra -supercapacitor ayadingeka ukugcina amandla elanga. Lapho kukhanyisa ebusuku, amabhethri noma ama-supercapacitor abese ekhishwa ngenqubo yokulawula umjikelezo ukuze anike amandla isekethe ye-LED drive. Inyunyana yamandla elanga namandla omoya kanye ne-LED kuwunyaka owodwa ogqamile we-LED. Izoletha ukukhanya ebumpofu nasezifundeni ezikude zomhlaba wesithathu, futhi ivumele ukukhanya okuluhlaza okukhazimulayo kukhanyise kuwo wonke amagumbi omhlaba. Ukunikezwa kwamandla kagesi we-LED kanye nomklamo wabo wesekethe yokushayela eyisisekelo 1. Isekethe yomshayeli we-LFD ene-voltage ephansi kagesi we-DC 1. Uma i-voltage yokufaka ingaphezulu kwe-voltage ye-LED, lapho i-voltage yokufaka iphezulu kune-voltage ye-LED noma yentambo ye-LED Isilawuli se-Antihypertensive. (1) I-linear regulator linear regulator iyi-DC-DC antihypertensive converter. Iningi labalawuli bomugqa abamukelwe isekethe ye-LED drive yi-low -voltage differential regulators (LDO). Amandla ukuthi asikho isidingo sezingxenye ze-inductance, inani lezingxenye ezidingekayo lincane, ukungazali kwe-EMI kwenzeka, futhi ukwehla kwayo kwamandla kagesi kungaphansi kwamandla okwehlisa amandla kunamandla. Kodwa-ke, uma kuqhathaniswa nesilawuli se-switch-type, ukulahleka kwamandla kwe-LDO kusemdala, futhi ukusebenza kahle kuphansi. Uma i-LDO ishayela i-350mA noma ngaphezulu kwentambo ye-LED yamandla, idinga ukungezwa ngerediyetha. (2) I-switch -voltage voltage (i-buck) stabilizer isekelwe ku-switch-type antihypertensive regulator ye-single -chip -specific IC. Imvamisa yokushintsha isilawuli esiningi se-antihypertensive ingaphezu kuka-1MHz, okwenza izingxenye zangaphandle zibe zincane kakhulu. I-entangle incane kakhulu, isebenza kahle ngaphezu kwama-90%. Nokho, lolu hlobo lwesiguquli luzozala umsindo oshintshayo, futhi kunenkinga ye-EMI. Umfanekiso 1 ubonisa i-3WLED boost drive circuit esekelwe ku-Zetex ZXSC300. I-RCS lapha ukumelana nezinzwa zokudluliswa kukagesi. Ngaphansi kwe-voltage yokufaka engu-6V, i-LED yamanje yamanje ifinyelela ku-1.11A.ZXSC300 ukuze yamukele ama-5 pin SOT23 amaphakheji. Ugesi we-LED kanye nomklamo wayo oyisisekelo wesekethe yokushayela njengamanje unama-transformer amaningi alwa nomfutho wegazi ophezulu i-single -chip ICs ukushintsha iswishi i-MOSFET (Q1) kanye ne-antihypertensive diode (D1). 2. Uma i-voltage yokufaka iphansi kune-voltage ye-LED, lapho i-voltage yokufaka iphansi kunevoltheji kagesi ephozithivu evamile ye-LED noma intambo ye-LED, i-LED idinga ukukhulisa isifunda sokushayela i-voltage. Kunezinhlobo ezimbili ze-booster converter kulezi zinhlobo ezimbili ezilandelayo. (1) Isiguquli sengcindezi eqondile Ekukhanyeni kokuphulwa kwefoni ephathekayo, isifunda somshayeli we-inductive voltage LED sivame ukusetshenziswa. I-switch-type inductance boost converter isetshenziswa njengentambo ye-LED yokwakheka kwe-LED eyodwa noma ngaphezulu, futhi okwamanje kwe-LED ngayinye kuyalingana. Uma kunomgwaqo we-LED ochungechungeni lwe-LED, amanye ama-LED azocisha. Umfanekiso 2 ubonisa i-inductive voltage LED drive circuit. Intambo ye-LED yenziwe ngamalambu amhlophe e-NSPW500BS Ledled ohlobo lwe-NSPW500BS lwe-8 Japan Asia Chemical Corporation. Ngaphansi kwe-voltage engu-4V yokufaka, amandla amanje e-LED ngayinye cishe angu-25mA nge-LED ngayinye. Ukunikezwa kwamandla kwe-LED kanye nomklamo wayo oyisisekelo wesekethe yokushayela ithuthukisa kakhulu isilawuli i-IC, futhi ishubhu yokushintsha ihlanganiswe ku-chip. (2) I-switch capacitor (ipompo yokushaja) i-boost converter shintsha i-capacitor voltage voltage converter, okungukuthi, iphampu yokushaja. I-IC ekhethekile yepompo yokushaja ine-switch eyakhelwe ngaphakathi, exhunywe ku-1 noma ezimbili 1 μI-capacitor yokushaja ye-F. Bangu 1 ×, 1.5 ×2 ×Eminyakeni yamuva, ibonise i-1.33 ×(4/3 izikhathi) kanye 4 ×imodeli. Lapho i-voltage yokuphuma iseduze ne-voltage yokufaka, ipompo yokushaja ayidingi ukwandisa i-voltage, okungukuthi, ku- 1 ×Imodeli. Lapho ingcindezi idingeka, shintshela ku-1.5 ×Noma ezinye izinto. Isekhethi yepompo yokushaja ingashayela uhlu lwe-LED, noma i-LED eyodwa kuphela.