In　order　to　eliminate　the　influence　of　electrolytic　capacitor　on　the　service　life　of　LED　driving　power　supply,　this　paper　proposes　a　single-stage　non　electrolytic　capacitor　LED　driving　circuit　topology　and　control　strategy　based　on　flyback　structure.　The　circuit　topology　is　that　the　auxiliary　energy　storage　circuit　is　connected　in　series　at　the　input　end　of　the　flyback　converter.　By　controlling　the　charge　and　discharge　of　the　auxiliary　energy　storage　capacitor,　the　instantaneous　input　and　output　power　were　balanced,　and　the　low-frequency　ripple　of　the　output　current　was　suppressed.　The　working　principle　of　the　circuit　topology　was　introduced　in　detail.　Combined　with　the　mechanism　of　low-frequency　ripple　of　output　current,　the　control　law　of　auxiliary　energy　storage　capacitor　charging　and　discharging　was　analyzed,　the　specific　control　method　was　given,　and　the　key　parameters　of　the　circuit　were　designed.　Finally,　a　30　W　digital　controlled　single-stage　non　electrolytic　capacitor　LED　driving　power　supply　prototype　was　developed.　The　experimental　results　show　that　the　auxiliary　energy　storage　capacitance　and　output　filter　capacitance　of　the　proposed　circuit　can　be　reduced　to　6.　8　μF,　and　the　output　current　ripple　can　be　reduced　to　16%　.　The　service　life　of　LED　driving　power　supply　is　improved　by　using　thin　film　capacitor　instead　of　traditional　electrolytic　capacitor.　©　2023　Editorial　Department　of　Electric　Machines　and　Control.　All　rights　reserved.