Part
Number
RoHS
Part
Number
Inductance
atIpk Ipk
Inductance
at0A (uHMin) (A)
(uH%)±10
Leakage
Inductance Secondary
Output
(nHMax)
8.0
4.6
3.9
2.3
0.7
Vout=1.8V,3.3A
Vout=2.5V,2.4A
Vout=3.3V,1.8A
Vout=5.0V,1.2A
Vout=12V,0.5A
DCR
(mOhmMax)
TurnsRatio
75
55
65
60
55
67.5
49.5
58.5
54.0
49.5
PriPri:Sec Pri:Bias Sec Bias
195
95
138
130
95
1:0.07
1:0.08
1:0.11
1:0.15
1:0.35
1:0.36
1:0.33
1:0.36
1:0.35
1:0.35
5
5
7
9
17
195
150
180
165
150
1.3
1.2
1.2
1.1
1.1
835-00830F
835-00831F
835-00832F
835-00833F
835-00834F
835-00830
835-00831
835-00832
835-00833
835-00834
SCHEMATICSSCHEMATICS
FlybacktransformersdesignedforPoE(IEEE802.3af)
LowLeakageInductance
Hipotvoltage:1500Vrms
powereddeviceswithupto6Watts
RoHScompliantversionisavailable
Customdesignisalsoavailable
Operatingtemperature-40°Cto+125°C.
ES25LECTRICALPECIFICATION@ °C
1
Designedfor250kHzswitchingfrequencywithinputof
36-72V
1.Inductanceismeasuredat250kHz,0.3Vrms.
2.Peakprimarycurrent,Ipk,isdrawnatminimuminputvoltage.
3.DCRfortheprimaryandforthesecondaryarewiththewindingsconnectedinparallel.
4.LeakageInductanceisfortheprimarywindingwiththesecondarywindingshorted.
5.Turnsratioarewiththeprimaryandthesecondarywindingsconnectedinparallel.
6.Outputofthesecondaryiswiththewindingsconnectedinparallel.Biaswindingoutputis12V,20mA.
Notes:
7.Operatingtemperaturerange:-40°to+125°C.Theparttemperature(ambienttemperature+temperaturerise)
shouldnotexceedtheupperlimitoftheoperatingtemperatureunderworstcaseoperatingconditions.Circuitdesign,
componentplacement,PWBtracesizeandthickness,airflowandothercoolingprovisionsallaffectthepart
temperature.Parttemperatureshouldbeverifiedintheendapplication.
C
2/FBlockA,94TokwawanRoad,Kowloon,HongKong Tel:(852)27653888 Fax:(852)29543304
Revisedin06/12PX206(01)
E&EMagneticProductsLimited ProvidingPowertoPoEdeviceswithupto6Watts
POWERTRANSFORMER
FlybackTransformerforPoE
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.Itdoesnotconstituteanyrepresentation,warrantyorcommitmentofthecompanyinrespect
oftheproductsinanyaspect.Alllogos,brandsandproductnamesmentionedhereinaretrademarksorregisteredtrademarksoftheirrespectiveowners.Thecompany
doesnotassumeanyliabilityarisingoutoftheapplicationoruseofanyproductorcircuitdescribedherein.Copyrights2006,E&EMagneticProductsLimited.
MDECHANICALIMENSIONS
SCHEMATICSSCHEMATICS
Weight(ingram):6.2typ.
Tape&Reel:250/reel
Notes:
10
3
Bias
Pri
1
12
2
11 Sec
8
5
7
6
8.Alldimensionsarespecifiedinwithhigherprecedenceininches.
inches
mm .010
0.25
.004
0.10
9.U±.nlessotherwisespecified,alltolerancesare
10. Coplanarity:max.
MAX
.675
17.15 MAX
MAX
1
12
6
7
REFERENCEOR
GAUGEPLANE
Pin1
location
.012.008
0.300.20
±
±
.865
21.97
.330
8.38
.050-.080
1.27-2.03
.492.010
12.500.25
±
±
.098.010
2.500.25
±
±
.028
0.71
.900
22.86
.492
12.50
.060
1.52
.098
2.50
.089
2.26
Recommended
PadLayout
835-008xx
(DATE)
EE
2/FBlockA,94TokwawanRoad,Kowloon,HongKong Tel:(852)27653888 Fax:(852)29543304
Revisedin06/12PX206(01)
E&EMagneticProductsLimited ProvidingPowertoPoEdeviceswithupto6Watts
POWERTRANSFORMER
FlybackTransformerforPoE
