Samsung DVD-E360 - Power; About S.M.P.S (Ringing Choke Converter Method); Circuit Descripcotion [FLY-Back RCC(Ringing Choke Converter)] Control

6.SchematicDiagrams
6.2.Power
6.2.1.AboutS.M.P .S(RingingChokeConverterMethod)
Terms
1)1st:Commonpowerinputto1stwinding.
2)2nd:Circuitfollowingsoutputwindingoftransformer.
3)f(Frequency):Switchingfrequency(T:Switchingcycle)
4)Duty:(Ton/T)x100
6.2.2.Circuitdescripcotion[FLY-BackRCC(RingingChokeConverter)]Control
1)ACPowerRectication/SmoothingTerminal
a)PDS01,PDS02,PDS03,PDS04:ConvertACpowertoDC(Fullwaverectication).
b)PEF10:SmooththevoltageconvertedtoDC.
c)PCD01,PCD02,PBS01:Noiseremovalatpowerinput/output.
d)PV A1:SMPSprotectionatpowersurgeinput.
2)SNUBBERCircuit:PDS11,PCD12,PRS13,PCD11,PPS12
a)Preventresidualhighvoltageattheterminalsofswitchduringswitchoff/Suppressnoise.Highinvertedpoweroccursatswitch(PQR11)off,becauseofthe1stwindingoftransformer:(V=-L1xdi/dt.L1:LeakageInduction)Averyhighresidualvoltage
existonbothterminalsofPICF14,5~8pinbecausedtisaveryshort.
b)SNUBBERcircuitprotectsPQR11fromdamagethroughleakagevoltagesuppressionbyRC,(ChargestheleakagevoltagetoPDS11,PER13,PCD12anddischargestoPRS11,PRS12).
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