In　application　of　small　and　medium　power　LED　lighting,　the　traditional　two-stage　LED　driver　exists　in　large　size,　two　sets　of　control　circuits　and　traditional　Cuk　PFC　circuit　rectifier　bridge　conduction　loss　and　other　issues.　A　single-stage　LED　driver　without　electrolytic　capacitor　integrated　by　a　bridgeless　Cuk　PFC　circuit　and　a　DC-DC　LLC　circuit　using　silicon　carbide　power　device　is　proposed,　which　reduces　conduction　loss,　MOS　tube　ZVS,　and　a　set　of　control　circuits.Finally,　a　200W　experimental　prototype　was　designed　on　the　basis　of　the　simulation.　In　the　input　voltage　range　of　185~265Vrms,　the　PF　values　of　the　prototype　were　obtained　to　be　higher　than　0.990,　and　the　THDs　were　obtained　to　be　less　than　15%.　at　the　input　voltage　of　185Vrms,　the　PFs　and　THDs　were　obtained　to　be　respectively　0.994　and　11.4%.　Under　full　load　conditions,　the　prototype　efficiency　was　obtained　up　to　92.39%　at　205Vrms　input.　The　effectiveness　of　the　proposed　driver　is　verified　by　simulation　and　experimental　results.　©　2023　IEEE.