MuLEDkuyendetsa magetsi oyendetsa magetsi kutengera mfundo ya kuchepetsa mphamvu ya capacitor, mfundo yochepetsera magetsi imakhala motere: pamene magetsi a sinusoidal AC amagwiritsidwa ntchito pa capacitor circuit, malipiro pa mbale ziwiri za capacitor ndi magetsi pakati pa magetsi. mbale ndi ntchito za nthawi. Ndiko kunena kuti: mtengo wogwira ntchito ndi matalikidwe a magetsi ndi zamakono pa capacitor zimatsatiranso lamulo la Ohm. Ndiko kuti, pamene matalikidwe amagetsi ndi mafupipafupi pa capacitor akhazikitsidwa, khola la sinusoidal AC panopa lidzayenda. Zing'onozing'ono za capacitive reactance ndi, kuchuluka kwa mtengo wa capacitance ndi, ndipo kuwonjezereka kwamakono kumayenda kudzera mu capacitor. Ngati katundu woyenera alumikizidwa motsatizana pa capacitor, gwero lamagetsi lochepetsedwa limatha kupezeka, lomwe limatha kutulutsidwa kudzera pakukonzanso, kusefa ndi kukhazikika kwamagetsi. Vuto lomwe liyenera kuzindikirika apa ndikuti m'dongosolo la dera lino, capacitor imangogwiritsa ntchito mphamvu mozungulira, koma sagwiritsa ntchito mphamvu, kotero kuti mphamvu ya capacitor buck circuit ndiyokwera kwambiri.

Kawirikawiri, waukulu galimoto dera laLEDmagetsi otengera mfundo ya capacitor buck adzapangidwa ndi Buck capacitor, dera lochepetsera pakali pano, kukonza chigawo cha fyuluta ndi voltage stabilizing shunt circuit. Pakati pawo, capacitor sitepe-pansi ndi wofanana ndi sitepe-pansi thiransifoma mu wamba voteji kukhazikika dera, amene mwachindunji chikugwirizana ndi AC mphamvu magetsi dera ndi zimbalangondo pafupifupi onse AC magetsi u, kotero zitsulo filimu capacitor popanda polarity. ziyenera kusankhidwa. Panthawi yomwe mphamvu imayatsidwa, ikhoza kukhala chiwongoladzanja chamtengo wapatali wa hafu yabwino kapena yoipa ya U. panthawiyi, nthawi yomweyo idzakhala yaikulu kwambiri. Chifukwa chake, choletsa cholepheretsa chapano chiyenera kulumikizidwa motsatizana pozungulira kuti zitsimikizire chitetezo cha dera, chomwe ndichifukwa chachikulu chomwe dera lochepetsera lilili lofunikira. Zofunikira pamapangidwe a rectifier ndi fyuluta yozungulira ndizofanana ndi zomwe zimayendetsedwa ndi DC wamba. Chifukwa chomwe ma voliyumu okhazikika a shunt amafunikira ndikuti mumayendedwe ochepetsa mphamvu yamagetsi, mtengo wapano wa I umakhala wokhazikika komanso wosakhudzidwa ndi kusintha kwa katundu wapano. Chifukwa chake, pagawo lokhazikika lamagetsi, payenera kukhala gawo la shunt kuti muyankhe kusintha kwa katundu wapano.