Aiming　at　the　problem　of　electrolytic　capacitors　affecting　the　life　and　reliability　of　LED　driving　power　supplies,　a　single-stage　non-isolated　type　without　electrolytic　capacitor　LED　driving　circuit　is　proposed.　The　charging　and　discharging　of　the　energy　storage　capacitor　achieves　the　balance　between　the　input　instantaneous　power　and　the　output　power,　thereby　reducing　the　low-frequency　ripple　of　the　output　current,　and　the　leakage　inductance　energy　can　also　be　effectively　used.　The　working　principle　and　switching　mode　of　the　topology　were　analyzed　in　detail.　According　to　the　proposed　circuit　topology,　the　key　parameters　of　the　circuit　were　designed　and　a　control　strategy　suitable　for　the　circuit　topology　was　proposed.　Finally,　a　30　W　principle　prototype　was　built.　The　experimental　results　show　that　the　proposed　circuit　scheme　can　suppress　the　ripple　of　the　output　current　to　less　than　20%,　the　auxiliary　energy　storage　capacitor　and　the　output　filter　capacitor　can　be　reduced　to　6.6　μF　and　8.8　μF　respectively,　so　that　the　electrolytic　capacitor　can　be　replaced　by　a　film　capacitor　with　a　longer　life,　which　improves　the　life　and　reliability　of　LED　drive　power.　©　2022,　Harbin　University　of　Science　and　Technology　Publication.　All　right　reserved.