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WE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748

SizeL
(mm)
W
(mm)
H
(mm)
EP5 8.26 6.6 5.59
EP7 9.14 9.78 10.54
EP10 15.24 13.34 11.43
EP13 17.75 13.5 12.5
ER9.5 12.95 10.41 5.97
EE16/8/5 24.5 20.2 16.5
EE20/10/6 25 21 16
EFD20 28.7 21.97 11.43
EFD25 32.31 27.03 13.69

Characteristics

  • easy design in solution
  • less external components needed
  • small board space
  • low cost
  • no optocoupler needed!
  • long term reliability voltage control
  • no aging
  • same external parts for different output voltages
  • easy design of custom power supply due to standard circuit and change of transformers and two components for feedback loop
  • Isolation voltage up to 2.5 kV

Applications

  • Isolated power design
  • Sensor interfaces
  • Isolated telecom converters
  • Power over Ethernet

Products

All
EP5
EP7
EP10
EP13
ER9.5
EE16/8/5
EE20/10/6
EFD20
EFD25
Order Code Data­sheet DownloadsVinVOut1
(V)
IOut1
(A)
VOut2
(V)
IOut2
(A)
VOut3
(V)
IOut3
(A)
VOut4
(V)
IOut4
(A)
L1
(µH)
nISAT 1
(A)
LSmin.
(µH)
VT
(V (AC))
SizeIC Reference Samples
750370042SPEC
8 files 5 V (DC) 5 0.2 5 0.1 5 0.1 15 1 : 1 : 1 : 1 1.5 0.25 1500 ER9.5 LT3573
750311691SPEC
8 files 8 - 15 V (DC) 150 0.001 60 1 : 5 0.25 1 1500 EP5 LT3748
750311692SPEC
8 files 8 - 15 V (DC) 150 0.001 150 0.001 80 1 : 5 1 2 1500 EP7 LT3748
750310471SPEC
8 files 9 - 30 V (DC) 5 2 25 3 : 1 2.6 0.43 1500 EP10 LT3573 & LT3575
750311675SPEC
8 files 9 - 30 V (DC) 5 2 25 3 : 1 2.5 0.13 1500 EP10 LT3573 & LT3575 & LT3748
750311305SPEC
8 files 9 - 30 V (DC) 12 1 50 3 : 1 2.8 1.2 1500 EP10 LT3575
750311306SPEC
8 files 9 - 30 V (DC) 12 1 100 3 : 1 1.65 1.75 1500 EP10 LT3575
750311307SPEC
8 files 9 - 30 V (DC) 24 0.5 100 2 : 1 1.9 2 1500 EP10 LT3574 & LT3575
750311308SPEC
8 files 9 - 30 V (DC) 24 0.5 100 1 : 1 2.1 2.1 1500 EP10 LT3574 & LT3575
750311303SPEC
8 files 9 - 30 V (DC) 5 3 50 5 : 1 2.25 0.8 1500 EP10 LT3575
750311304SPEC
8 files 9 - 30 V (DC) 5 3 50 4 : 1 2.4 0.85 1500 EP10 LT3574 & LT3575
750310617SPEC
8 files 9 - 36 V (DC) 12 3 4.5 1 : 1.16 14 0.15 1500 EFD20 LT3748
750311567SPEC
8 files 10 - 40 V (DC) 5 3 7 2 : 1 11.2 0.8 1500 EP10 LT3575 & LT3748
750311625SPEC
8 files 10 - 40 V (DC) 3.3 4 9 4 : 1 8 0.35 1500 EP13 LT3575 & LT3748
750311564SPEC
8 files 10 - 40 V (DC) 5 3 9.07 3 : 1 8 0.12 1500 EP13 LT3575 & LT3748
750311624SPEC
8 files 10 - 40 V (DC) 15 1 9 1.5 : 1 8 0.18 1500 EP13 LT3575 & LT3748
750310559SPEC
8 files 12 - 30 V (DC) 3.3 1.5 24 4 : 1 2.1 0.5 1500 EP10 LT3573 & LT3575
750310564SPEC
8 files 12 - 30 V (DC) 5 1 5 1 63 3 : 1 1.45 0.6 1500 EP10 LT3574 & LT3573 & LT3575
750311486SPEC
8 files 12 V (DC) 200 0.002 200 100 1 : 10 : 10 2 4.5 1500 EP13 LT3748
750311681SPEC
8 files 12 V (DC) 200 0.002 200 100 1 : 10 : 10 2 3 1500 EP13 LT3748
750310988SPEC
8 files 12 V (DC) 48 0.85 14 1 : 4.42 15 0.2 1500 EFD25 LT3748
750311856SPEC
8 files 16 - 24 V (DC) 15 0.15 15 0.15 15 0.15 15 0.15 3.8 1 : 4 : 4 : 4 : 4 12 0.25 1500 EP13 LT3575 & LT3748
750311911SPEC
8 files 16 - 24 V (DC) 15 0.2 15 0.2 15 0.2 15 0.2 6.8 1 : 3 : 3 : 3 : 3 13 0.1 1500 EE10/10/6 LT3748
750370059SPEC
8 files 18 - 30 V (DC) 5 1 50 3 : 1 1.6 0.5 1500 EP7 LT3573
750370041SPEC
8 files 18 - 30 V (DC) 5 1 50 3 : 1 1.6 0.45 1500 EP7 LT3574 & LT3573
750370040SPEC
8 files 18 - 30 V (DC) 5 1 30 3 : 1 1.7 1 1500 EP7 LT3574 & LT3573
750370047SPEC
8 files 18 - 30 V (DC) 5 1 30 3 : 1 1.7 1 1500 EP7 LT3574 & LT3573
750370058SPEC
8 files 18 - 30 V (DC) 15 0.4 25 1 : 1 2 0.185 1500 EP7 LT3573
750310799SPEC
8 files 18 - 30 V (DC) 15 0.4 25 1 : 1 2 0.125 1500 EP7 LT3573
750310562SPEC
8 files 18 - 30 V (DC) 12 0.8 25 2 : 1 2.8 0.5 1500 EP10 LT3573 & LT3575
750310563SPEC
8 files 18 - 30 V (DC) 12 0.8 25 1 : 1 2.8 0.5 1500 EP10 LT3573 & LT3575
750311797SPEC
8 files 18 - 100 V (DC) 12 2.5 14 2 : 5 : 1 11.5 0.21 4000 EFD20 LT3748
750311385SPEC
8 files 18 - 60 V (DC) 13 2.3 15 1.25 : 1 6.75 0.1 1500 EFD20 LT3748
750311783SPEC
8 files 19 - 70 V (DC) 24 2.5 20 1.5 : 1 16 0.17 1500 EFD25 LT3748
750311597SPEC
8 files 20 - 48 V (DC) 5 6 6 3 : 1 9.5 0.3 1500 EFD20 LT3748
750311598SPEC
8 files 20 - 48 V (DC) 12 2.5 8.3 2 : 1 9 0.3 1500 EFD20 LT3748
750311599SPEC
8 files 20 - 48 V (DC) 15 2 8 3 : 2 12 0.5 1500 EFD20 LT3748
750311604SPEC
8 files 20 - 48 V (DC) 24 1.3 8 1 : 1 9.5 0.3 1500 EFD20 LT3748
750311589SPEC
8 files 20 - 48 V (DC) 5 9 6 3 : 1 18 0.2 1500 EFD25 LT3748
750311591SPEC
8 files 20 - 48 V (DC) 15 3 8 3 : 2 20 0.2 1500 EFD25 LT3748
750311590SPEC
8 files 20 - 48 V (DC) 12 3.8 8 2 : 1 18 0.2 1500 EFD25 LT3748
750311592SPEC
8 files 20 - 48 V (DC) 24 1.9 8 1 : 1 18 0.2 1500 EFD25 LT3748
750311889SPEC
8 files 28 V (DC) 250 0.1 37 1 : 5 2.95 0.16 500 EFD25 LT3748
750311605SPEC
8 files 30 - 75 V (DC) 5 6 15 7 : 2 9.5 0.5 1500 EFD20 LT3748
750311607SPEC
8 files 30 - 75 V (DC) 12 2.5 14 5 : 2 9.5 0.5 1500 EFD20 LT3748
750311600SPEC
8 files 30 - 75 V (DC) 15 2 12 2 : 1 11 0.5 1500 EFD20 LT3748
750311608SPEC
8 files 30 - 75 V (DC) 24 1.3 12 3 : 2 9 0.5 1500 EFD20 LT3748
750311593SPEC
8 files 30 - 75 V (DC) 5 9 15 7 : 2 18 0.3 1500 EFD25 LT3748
750311595SPEC
8 files 30 - 75 V (DC) 15 3 12 2 : 1 16 0.2 1500 EFD25 LT3748
750311594SPEC
8 files 30 - 75 V (DC) 12 3.8 15 5 : 2 18 0.4 1500 EFD25 LT3748
750311596SPEC
8 files 30 - 75 V (DC) 24 1.9 12 3 : 2 18 0.2 1500 EFD25 LT3748
750311342SPEC
8 files 36 V (DC) 5 3 15 2 : 1 5.8 0.65 1500 EP10 LT3575
750311424SPEC
8 files 36 V (DC) 12 1 100 3 : 1 2.4 0.9 1500 EP13 LT3748
750311456SPEC
8 files 36 V (DC) 12 1 100 3 : 1 2.4 0.9 2500 EP13 LT3748
750311458SPEC
8 files 36 V (DC) 3.3 4 15 3 : 1 5 0.175 2500 EP13 LT3575 & LT3748
750311422SPEC
8 files 36 V (DC) 5 4 50 5 : 1 3.3 0.6 1500 EP13 LT3575 & LT3748
750311423SPEC
8 files 36 V (DC) 5 4 50 4 : 1 3.85 0.6 1500 EP13 LT3575 & LT3748
750311457SPEC
8 files 36 V (DC) 5 4 50 4 : 1 3.7 0.6 2500 EP13 LT3575 & LT3748
750311688SPEC
8 files 36 V (DC) 5 4 50 5 : 1 3.1 0.6 1500 EP13 LT3575 & LT3748
750311689SPEC
8 files 36 V (DC) 5 4 50 4 : 1 3.7 0.6 2500 EP13 LT3575 & LT3748
750311439SPEC
8 files 37 - 57 V (DC) 12 2.1 37 2 : 1 2.8 0.75 1500 EP13 LT3575 & LT3748
750811048SPEC
8 files 100 - 400 V (DC) 30 0.3 1500 4.5 : 1 0.65 22 4500 EE16/8/5 LT3748
750311771SPEC
8 files 100 - 400 V (DC) 15 3 500 6 : 1 2.5 5 2500 EFD25 LT3748
Order Code Data­sheet
750370042SPEC
750311691SPEC
750311692SPEC
750310471SPEC
750311675SPEC
750311305SPEC
750311306SPEC
750311307SPEC
750311308SPEC
750311303SPEC
750311304SPEC
750310617SPEC
750311567SPEC
750311625SPEC
750311564SPEC
750311624SPEC
750310559SPEC
750310564SPEC
750311486SPEC
750311681SPEC
750310988SPEC
750311856SPEC
750311911SPEC
750370059SPEC
750370041SPEC
750370040SPEC
750370047SPEC
750370058SPEC
750310799SPEC
750310562SPEC
750310563SPEC
750311797SPEC
750311385SPEC
750311783SPEC
750311597SPEC
750311598SPEC
750311599SPEC
750311604SPEC
750311589SPEC
750311591SPEC
750311590SPEC
750311592SPEC
750311889SPEC
750311605SPEC
750311607SPEC
750311600SPEC
750311608SPEC
750311593SPEC
750311595SPEC
750311594SPEC
750311596SPEC
750311342SPEC
750311424SPEC
750311456SPEC
750311458SPEC
750311422SPEC
750311423SPEC
750311457SPEC
750311688SPEC
750311689SPEC
750311439SPEC
750811048SPEC
750311771SPEC
Samples
Order Code Data­sheet DownloadsVinVOut1
(V)
IOut1
(A)
VOut2
(V)
IOut2
(A)
VOut3
(V)
IOut3
(A)
VOut4
(V)
IOut4
(A)
L1
(µH)
nISAT 1
(A)
LSmin.
(µH)
VT
(V (AC))
SizeIC Reference Samples

Comments

  • Dependant on application, the transformer specification can slightly differ to data sheet.