part number rohs part number inductance atipk ipk inductance at0a (uhmin) (a) (uh%) 10 leakage inductance secondary output (nhmax) 7.8 6.7 7.0 5.0 4.0 4.0 8.0 3.1 5.8 2.4 vout=1.8v,3.3a vout=1.8v,3.3a vout=2.5v,2.4a vout=2.5v,2.4a vout=3.3v,1.8a vout=3.3v,1.8a vout=5.0v,1.2a vout=5.0v,1.2a vout=12v,0.5a vout=12v,0.5a dcr (mohmmax) turnsratio 167 75 177 80 184 85 193 90 204 95 150.3 67.5 159.3 72.0 165.6 76.5 173.7 81.0 183.6 85.5 pri pri:sec pri:bias sec bias 303 311 353 219 286 285 344 271 293 265 1:0.063 1:0.063 1:0.083 1:0.083 1:0.100 1:0.100 1:0.143 1:0.143 1:0.333 1:0.333 1:0.344 1:0.344 1:0.333 1:0.333 1:0.333 1:0.333 1:0.343 1:0.357 1:0.333 1:0.333 17 18 27 17 26 26 43 33 83 74 570 575 660 388 515 530 660 529 545 484 0.62 1.0 0.60 0.95 0.57 0.90 0.55 0.85 0.52 0.80 835-00820f 835-00825f 835-00821f 835-00826f 835-00822f 835-00827f 835-00823f 835-00828F 835-00824f 835-00829f 835-00820 835-00825 continuousmode discontinuousmode 835-00821 835-00826 835-00822 835-00827 835-00823 835-00828 835-00824 835-00829 s chematics s chematics flybacktransformersdesignedforpoe(ieee802.3af) lowleakageinductance hipotvoltage:1500vrms powereddeviceswithupto6watts rohscompliantversionisavailable customdesignisalsoavailable operatingtemperature-40cto+85c. es25 lectricalpecification@ c 1 designedfor250khzswitchingfrequencywithinputof 36-72v 1.inductanceismeasuredat250khz,0.5vrms,0adc. 2.peakprimarycurrent,ipk,isdrawnatminimuminputvoltage. 3.dcrfortheprimaryandforthesecondaryarewiththewindingsconnectedinparallel. 4.leakageinductanceisfortheprimarywindingwiththesecondarywindingshorted. 5.turnsratioarewiththeprimaryandsecondarywindingsconnectedinparallel. 6.outputofthesecondaryiswiththewindingsconnectedinparallel.biaswindingoutputis12v,0.2a. 7.designedtoremainincontinuousmodeoperationatpowerlevelsof3wattsandabove. notes: 8.operatingtemperaturerange:-40to+125c.theparttemperature(ambienttemperature+temperaturerise) shouldnotexceedtheupperlimitoftheoperatingtemperatureunderworstcaseoperatingconditions.circuitdesig n, componentplacement,pwbtracesizeandthickness,airflowandothercoolingprovisionsallaffectthepart temperature.parttemperatureshouldbeverifiedintheendapplication. c 2/fblocka,94tokwawanroad,kowloon,hongkong tel:(852)27653888 fax:(852)29543304 revisedin06/12 px205(01) e&emagneticproductslimited providingpowertopoedeviceswithupto6watts powertransformer flybacktransformerforpoe
12 1 7 6 8xx-00xxx ee (date) .098 2.50 .008 0.20 .492 12.50 .008 0.20 .291 7.40 .661 16.80 max max ref .028 0.70 max .650 16.50 referenceor gaugeplane .709 18.00 .492 12.50 .069 1.75 .098 2.50 .098 2.50 recommended padlayout 2 formoreinformation,pleasecontact headquarter 2/fblocka,meritindustrialcentre, 94tokwawanroad,kowloon, hongkong tel:(852)27653888 fax:(852)29543304 email:eempl@eleceltek.com website:http://www.eleceltek.com informationhereinisforreferenceonlyandsubjecttochangewithoutnotice.itdoesnotconstituteanyrepresenta tion,warrantyorcommitmentofthecompanyinrespect oftheproductsinanyaspect.alllogos,brandsandproductnamesmentionedhereinaretrademarksorregisteredtrad emarksoftheirrespectiveowners.thecompany doesnotassumeanyliabilityarisingoutoftheapplicationoruseofanyproductorcircuitdescribedherein.copyri ghts2006,e&emagneticproductslimited. s chematics s chematics md echanicalimensions weight(ingram):2.9typ. tape&reel:300/reel 9.alldimensionsarespecifiedinwithhigherprecedenceininches. inches mm .010 0.25 .004 0.10 notes: 10.u. nlessotherwisespecified,alltolerancesare 11. coplanarity:max. 5 4 pri bias sec 9 1 11 2 8 6 3 10 2/fblocka,94tokwawanroad,kowloon,hongkong tel:(852)27653888 fax:(852)29543304 revisedin06/12 px205(01) e&emagneticproductslimited providingpowertopoedeviceswithupto6watts powertransformer flybacktransformerforpoe
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