Yintoni iVoltage yoMbane we-LED kunye neSekethe yeSiseko sokuQhuba?

Unikezelo lwamandla lwangaphambili lonikezelo lwamandla ombane we-LED luneentlobo ezintathu ezibalulekileyo: iibhetri eziphantsi-voltage, iiseli zelanga, kunye nonikezelo lwamandla onxibelelwano lwemarike. Kungakhathaliseki ukuba loluphi unikezelo lwamandla lwangaphambili olwamkelweyo, imfuneko yokutshintsha kwamandla kwaneliswe yi-LED. Olu hlobo lwesekethe yokuguqulwa kwamandla ngokubanzi luthetha isekethe ye-LED drive. Kwinkqubo yokunikezelwa kwamandla elanga ye-LED, iibhetri okanye i-ultra -supercapacitors ziyadingeka ukugcina amandla elanga. Xa ukhanyisa ebusuku, iibhetri okanye ii-supercapacitors ke zikhutshwa ngenkqubo yokulawula isekethe ukunika amandla isekethe ye-LED drive. Umanyano lwamandla elanga kunye namandla omoya kunye ne-LED yeyona nto ibalaseleyo ye-LED yonyaka omnye. Iya kuzisa ukukhanya kwintlupheko nakwimimandla ekude yehlabathi lesithathu, kwaye uvumele ukukhanya okuluhlaza okukhazimlayo kukhanyise zonke iikona zehlabathi. Umbane we-LED kunye noyilo lwabo olusisiseko lokuqhuba isekethe 1. Isekethe yomqhubi we-LFD ene-voltage ephantsi yobonelelo lwamandla e-DC 1. Xa igalelo lombane liphezulu kunombane we-LED, xa igalelo lombane liphezulu kunombane we-LED okanye umtya we-LED Antihypertensive regulator. (1) I-linear regulator linear regulator yi-DC-DC antihypertensive converter. Uninzi lwabalawuli bomgca abamkelwe yisekethe ye-LED ye-drive yi-low -voltage differential regulators (LDO). Amandla kukuba akukho mfuneko yamacandelo e-inductance, inani lamacandelo afunekayo lincinci, i-EMI infertility iyenzeka, kwaye i-voltage drop yayo iphantsi kumandla okunciphisa amandla ngaphezu kwamandla. Nangona kunjalo, xa kuthelekiswa ne-switch-type regulator, ukulahlekelwa kwamandla e-LDO kusemdala, kwaye ukusebenza kakuhle kuphantsi. Xa i-LDO iqhuba i-350mA okanye ngaphezulu kwamandla entambo ye-LED, kufuneka yongezwe ngeradiyetha. 2 Uninzi lwe-antihypertensive regulator switching frequency lungaphezulu kwe-1MHz, nto leyo eyenza amacandelo angaphandle abe mancinci kakhulu. I-entangle incinci kakhulu, inempumelelo engaphezulu kwe-90%. Nangona kunjalo, olu hlobo lokuguqula luya kuzala kwingxolo yokutshintsha, kwaye kukho ingxaki ye-EMI. Umzobo 1 ubonisa isekethe ye-3WLED ye-boost drive esekwe kwiZetex ZXSC300. I-RCS apha kukuxhathisa ukuhanjiswa kombane. Ngaphantsi kwe-voltage yegalelo le-6V, i-LED yangoku ifikelela kwi-1.11A.ZXSC300 ukwamkela ii-5 pins SOT23 ukupakishwa. Unikezelo lwamandla lwe-LED kunye noyilo lwesekethe yokuqhuba olusisiseko luneziguquli ezininzi ze-antihypertensive single -chip ICs zokutshintsha i-MOSFET (Q1) kunye ne-antihypertensive diode (D1). 2. Xa igalelo lombane lingaphantsi kombane we-LED, xa igalelo lombane lisezantsi kune-voltage ye-voltage eqhelekileyo ye-LED okanye intambo ye-LED, i-LED kufuneka inyuse i-voltage drive circuit. Kukho iindidi ezimbini ze-booster converter kwezi ntlobo zimbini zilandelayo. 1 I-switch-type inductance boost converter isetyenziswe njengentambo ye-LED yokwakheka kwe-LED enye okanye ngaphezulu, kwaye yangoku ye-LED nganye iyalingana. Ukuba kukho indlela ye-LED kumtya we-LED, ezinye ii-LED ziya kuphuma. Umzobo 2 ubonisa i-inductive voltage LED drive circuit. Umtya we-LED wenziwa ngokukhanya okumhlophe kwe-NSPW500BS Izibane ezikhokelwayo ze-NSPW500BS uhlobo lwe-8 Japan Asia Chemical Corporation. Ngaphantsi kwe-voltage ye-4V yegalelo, okwangoku kwi-LED nganye malunga ne-25mA nge-LED nganye. Unikezelo lwamandla e-LED kunye noyilo olusisiseko lokuqhuba isekethe lukhulisa kakhulu umlawuli we-IC, kwaye ityhubhu yokutshintsha idityaniswe kwi-chip. 2 I-IC ekhethekileyo yempompo yentlawulo ine-switch-in switch, edibeneyo kwi-1 okanye ezimbini 1 μI-capacitor yokutshaja ye-F. Nazi 1 ×, 1.5 ×2 ×Kwiminyaka yakutshanje, ibonise i-1.33 ×(4/3 amaxesha) kunye 4 ×imodeli. Xa i-voltage ephumayo isondele kwi-voltage yegalelo, ipompo yentlawulo ayifuni ukunyusa i-voltage, oko kukuthi, kwi 1 ×Imodeli. Xa uxinzelelo lufuneka, tshintshela kwi-1.5 ×Okanye ezinye izinto. Isekethe yepompo yentlawulo inokuqhuba uluhlu lwe-LED, okanye i-LED enye kuphela.