Due　to　low　cost　and　high　efficiency,　the　AC-DC　single-stage　LED　driver　has　been　used　to　realize　power　factor　correction　and　DC-DC　constant　current　output.　But　there　usually　exists　the　problem　of　larger　twice　line　frequency　output　ripple,　which　is　one　of　the　important　factors　to　affect　LED　optical　properties　and　lifetime.　A　suitable　kind　of　LED　driver　that　a　single-stage　modified　Flyback　power　factor　correction　circuit　combined　with　a　auxiliary　CCM　Boost　converter　and　a　current　ripple　suppression　strategy　is　proposed　in　this　paper,　the　operating　principle　of　the　proposed　circuit　and　the　implementation　condition　of　low　output　current　ripple　are　analyzed.　The　simulation　and　experiment　are　carried　out　to　verify　the　correctness　and　feasibility　of　the　theoretical　analysis.　The　experimental　results　show　that　the　output　current　ripple　can　be　reduced　effectively　through　the　proposed　single-stage　LED　driver,　and　the　input　characteristics　doesn＇t　be　affected.　©　2016　IEEE.