Tus tsav tsheb tsis tu ncua (CV) LED yog AC-DC fais fab mov lossis DC-DC converter uas muab cov zis hluav taws xob ruaj khov, feem ntau yog 12 volts lossis 24 volts, tsis yog qhov tam sim no. Tsis tu ncua voltage LED tsav tsheb yog tsim los ua haujlwm lub teeb pom kev zoo uas muaj ntau lub LED modules txuas nrog tib lub sijhawm.
Tsis txhob tsis meej pem los ntawm cov "tsis tu ncua voltage vs. tas li tam sim no LED tsav tsheb" kev sib piv. Tag nrho cov LEDs tau tsav tam sim no, thiab tsuas yog nrog cov tswv yim tam sim no tuaj yeem ua rau LEDs muaj qhov sib xws, tsis yog flickering illumination. Tus tsav tsheb tam sim no LED muab cov kev tswj xyuas tam sim no uas tuaj yeem siv los tsav lub LED lossis LED module ncaj qha, whereas ib qho hluav taws xob tsis tu ncua LED tsav tsheb, hais lus nruj me ntsis, tsis yog tus tsav tsheb LED vim nws tsis muab cov khoom tso tawm uas tam sim no-sensitive. LED lossis LED module tuaj yeem ua haujlwm nrog. Yog li ntawd, CV LED tsav tsheb yog ib qho kev siv hluav taws xob uas muab hluav taws xob ib nrab ua haujlwm nrog tsuas yog qhov hluav taws xob tau tswj hwm mus tas li. Lub thauj khoom nws muab rau ib qho LED lossis LED module yuav tsum tau tswj xyuas ntxiv txhawm rau txhawm rau ua kom haum raws li qhov xav tau ntawm hluav taws xob tam sim no ntawm lub diode (s).
