KwiI-LEDUkuqhuba isekethe yonikezelo lwamandla ngokusekwe kumgaqo wokucutha amandla ombane we-capacitor, umgaqo wokunciphisa umbane ufana ngolu hlobo lulandelayo: xa umbane we-sinusoidal AC usetyenziswa kwisekethe ye-capacitor, intlawulo kwiipleyiti ezimbini ze-capacitor kunye nentsimi yombane phakathi. amacwecwe yimisebenzi yexesha. Oko kukuthi: ixabiso elisebenzayo kunye ne-amplitude ye-voltage kunye ne-current on capacitor nayo ilandela umthetho we-Ohm. Oko kukuthi, xa i-voltage amplitude kunye ne-frequency kwi-capacitor ilungisiwe, i-stable sinusoidal AC yangoku iya kuhamba. Incinci i-reactance capacitive kukuba, ixabiso elikhulu le-capacitance, kwaye inkulu ikhoyo ngoku ehamba nge-capacitor. Ukuba umthwalo ofanelekileyo uqhagamshelwe kwichungechunge kwi-capacitor, umthombo we-voltage oncitshisiweyo unokufumaneka, onokukhutshwa ngokulungiswa, ukucoca kunye nokuzinzisa i-voltage. Ingxaki ekufuneka iqatshelwe apha kukuba kule nkqubo yesiphaluka, i-capacitor isebenzisa amandla kuphela kwisiphaluka, kodwa ayisebenzisi amandla, ngoko ke ukusebenza kakuhle kwe-capacitor buck circuit kuphezulu kakhulu.

Ngokuqhelekileyo, isiphaluka esiphambili sokuqhubaI-LEDunikezelo lwamandla olusekwe kumgaqo we-capacitor buck luya kuqulunqwa nge-Buck capacitor, i-current limiting circuit, ukulungisa i- filter circuit kunye ne-voltage stabilizing shunt circuit. Phakathi kwabo, i-capacitor ye-step-down ilingana ne-step-down transformer kwi-voltage yesiqhelo yokuzinzisa isiphaluka, eqhagamshelwe ngokuthe ngqo kwisekethe yombane we-AC kwaye ithwala phantse yonke i-AC power supply u, ngoko i-capacitor yefilimu yesinyithi ngaphandle kwe-polarity. kufuneka kukhethwe. Okwangoku xa amandla evuliwe, ingaba yincopho yexabiso eliphezulu le-positive okanye embi yesiqingatha somjikelo we-U. ngeli xesha, umsinga okhawulezileyo uya kuba mkhulu kakhulu. Ke ngoko, i-resistor yokukhawulela yangoku kufuneka idityaniswe kuthotho kwisekethe ukuze kuqinisekiswe ukhuseleko lwesekethe, sesona sizathu siphambili sokuba kutheni isekethe yokukhawulela yangoku iyimfuneko. Iimfuno zoyilo zomlungisi kunye nesekethe yokucoca ziyafana nezo zesekethe yonikezelo lombane eqhelekileyo elawulwa yiDC. Isizathu sokuba i-voltage stabilizing shunt circuit iyadingeka kukuba kwisekethe yokunciphisa i-voltage, ixabiso elisebenzayo le-current I lizinzile kwaye alichaphazeleki ngokutshintsha komthwalo wangoku. Ngoko ke, kwisiphaluka sokuzinzisa i-voltage, kufuneka kubekho isiphaluka se-shunt ukuphendula utshintsho lwangoku lomthwalo.