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

Size Dimen­sions 3D L
(mm)
W
(mm)
H
(mm)
EP5
6.6 8.26 5.59
EP7
- - -
EP10
13.34 15.24 11.43
EP13
- - 12.7
ER9.5
10.41 12.95 5.97
EE16/8/5
20.32 24.38 16
EE20/10/6
22.2 25 16
EFD20
23.11 29.08 11.43
EFD25
27.03 32.31 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

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Products

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EP5
EP7
EP10
EP13
ER9.5
EE16/8/5
EE20/10/6
EFD20
EFD25
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Order Code
Data­sheet
Simu­lation
Downloads
Status
VIN
VOut1 (V)
IOut1 (A)
VOut2 (V)
IOut2 (A)
VOut3 (V)
IOut3 (A)
VOut4 (V)
IOut4 (A)
Vaux (V)
L (µH)
n
ISAT (A)
LS (µH)
VT (V (AC))
Size
IC Reference
Samples
750370042
5 V (DC), 5 V, 0.1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 5 V (DC)
Output Voltage 1 5 V
Output Current 1 0.1 A
Output Voltage 2 5 V
Output Current 2 0.1 A
Auxiliary Voltage 5 V
Inductance 15 µH
Turns Ratio 1:1:1:1 
Saturation Current 1.5 A
Leakage Inductance 0.6 µH
Insulation Test Voltage 1500 V (AC)
Size ER9.5 
IC Reference LT3573 
750311691
8 - 15 V (DC), 150 V, 0.001 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 8 - 15 V (DC)
Output Voltage 1 150 V
Output Current 1 0.001 A
Inductance 60 µH
Turns Ratio 1:5 
Saturation Current 0.25 A
Leakage Inductance 1 µH
Insulation Test Voltage 1500 V (AC)
Size EP5 
IC Reference LT3748 
750311692
8 - 15 V (DC), 150 V, 0.001 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 8 - 15 V (DC)
Output Voltage 1 150 V
Output Current 1 0.001 A
Output Voltage 2 -150 V
Output Current 2 0.001 A
Inductance 80 µH
Turns Ratio 1:5:5 
Saturation Current 1 A
Leakage Inductance 2 µH
Insulation Test Voltage 1500 V (AC)
Size EP7 
IC Reference LT3748 
750311856
8 - 24 V (DC), 15 V, 0.15 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 8 - 24 V (DC)
Output Voltage 1 15 V
Output Current 1 0.15 A
Output Voltage 2 15 V
Output Current 2 0.15 A
Output Voltage 3 15 V
Output Current 3 0.15 A
Output Voltage 4 15 V
Output Current 4 0.15 A
Inductance 3.8 µH
Turns Ratio 1:1:4:4:4:4 
Saturation Current 12 A
Leakage Inductance 0.4 µH
Insulation Test Voltage 1500 V (AC)
Size EP13 
IC Reference LT3575 & LT3748 
750311911
8 - 24 V (DC), 15 V, 0.2 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 8 - 24 V (DC)
Output Voltage 1 15 V
Output Current 1 0.2 A
Output Voltage 2 15 V
Output Current 2 0.2 A
Output Voltage 3 15 V
Output Current 3 0.2 A
Output Voltage 4 15 V
Output Current 4 0.2 A
Auxiliary Voltage 5 V
Inductance 6.78 µH
Turns Ratio 1:3:3:3:3:1 
Saturation Current 13 A
Leakage Inductance 0.2 µH
Insulation Test Voltage 1500 V (AC)
Size EE20/10/6 
IC Reference LT3748 
750310471
9 - 30 V (DC), 5 V, 2 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 9 - 30 V (DC)
Output Voltage 1 5 V
Output Current 1 2 A
Auxiliary Voltage 5 V
Inductance 25 µH
Turns Ratio 3:1:1 
Saturation Current 2.6 A
Leakage Inductance 0.43 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3573 & LT3575 
750311675
9 - 30 V (DC), 5 V, 2 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 9 - 30 V (DC)
Output Voltage 1 5 V
Output Current 1 2 A
Auxiliary Voltage 5 V
Inductance 25 µH
Turns Ratio 3:1:1 
Saturation Current 2.5 A
Leakage Inductance 0.25 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3573 & LT3575 & LT3748 
750311306
9 - 36 V (DC), 12 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 9 - 36 V (DC)
Output Voltage 1 12 V
Output Current 1 1 A
Auxiliary Voltage 8 V
Inductance 100 µH
Turns Ratio 3:1:0.667 
Saturation Current 1.65 A
Leakage Inductance 3 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3575 
750311308
9 - 36 V (DC), 24 V, 0.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 9 - 36 V (DC)
Output Voltage 1 24 V
Output Current 1 0.5 A
Auxiliary Voltage 8 V
Inductance 100 µH
Turns Ratio 1:1:0.333 
Saturation Current 2.1 A
Leakage Inductance 3 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3574 & LT3575 
750310617
9 - 36 V (DC), 12 V, 3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 9 - 36 V (DC)
Output Voltage 1 12 V
Output Current 1 3 A
Auxiliary Voltage 12 V
Inductance 4.5 µH
Turns Ratio 1:1.16:1.16 
Saturation Current 14 A
Leakage Inductance 0.15 µH
Insulation Test Voltage 1875 V (AC)
Size EFD20 
IC Reference LT3748 
750370059
10 - 30 V (DC), 5 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 10 - 30 V (DC)
Output Voltage 1 5 V
Output Current 1 1 A
Auxiliary Voltage 5 V
Inductance 50 µH
Turns Ratio 3:1:1 
Saturation Current 1.6 A
Leakage Inductance 1 µH
Insulation Test Voltage 1500 V (AC)
Size EP7 
IC Reference LT3573 
750370041
10 - 30 V (DC), 5 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 10 - 30 V (DC)
Output Voltage 1 5 V
Output Current 1 1 A
Auxiliary Voltage 5 V
Inductance 50 µH
Turns Ratio 3:1:1 
Saturation Current 1.6 A
Leakage Inductance 1 µH
Insulation Test Voltage 1500 V (AC)
Size EP7 
IC Reference LT3574 & LT3573 
750370040
10 - 30 V (DC), 5 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 10 - 30 V (DC)
Output Voltage 1 5 V
Output Current 1 1 A
Auxiliary Voltage 5 V
Inductance 30 µH
Turns Ratio 3:1:1 
Saturation Current 1.7 A
Leakage Inductance 1 µH
Insulation Test Voltage 1500 V (AC)
Size EP7 
IC Reference LT3574 & LT3573 
750370047
10 - 30 V (DC), 5 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 10 - 30 V (DC)
Output Voltage 1 5 V
Output Current 1 1 A
Auxiliary Voltage 5 V
Inductance 30 µH
Turns Ratio 3:1:1 
Saturation Current 1.7 A
Leakage Inductance 1 µH
Insulation Test Voltage 1500 V (AC)
Size EP7 
IC Reference LT3574 & LT3573 
750370058
10 - 30 V (DC), 15 V, 0.4 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 10 - 30 V (DC)
Output Voltage 1 15 V
Output Current 1 0.4 A
Auxiliary Voltage 5 V
Inductance 25 µH
Turns Ratio 1:1:0.33 
Saturation Current 2 A
Leakage Inductance 0.3 µH
Insulation Test Voltage 1500 V (AC)
Size EP7 
IC Reference LT3573 
750310799
10 - 30 V (DC), 15 V, 0.4 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 10 - 30 V (DC)
Output Voltage 1 15 V
Output Current 1 0.4 A
Auxiliary Voltage 5 V
Inductance 25 µH
Turns Ratio 1:1:0.33 
Saturation Current 2 A
Leakage Inductance 0.125 µH
Insulation Test Voltage 1500 V (AC)
Size EP7 
IC Reference LT3573 
750311567
10 - 40 V (DC), 5 V, 3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 10 - 40 V (DC)
Output Voltage 1 5 V
Output Current 1 3 A
Auxiliary Voltage 10 V
Inductance 7 µH
Turns Ratio 2:1:2 
Saturation Current 11.2 A
Leakage Inductance 0.8 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3575 & LT3748 
750311625
10 - 40 V (DC), 3.3 V, 4 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 10 - 40 V (DC)
Output Voltage 1 3.3 V
Output Current 1 4 A
Auxiliary Voltage 8 V
Inductance 9 µH
Turns Ratio 4:1:2.2 
Saturation Current 8 A
Leakage Inductance 0.5 µH
Insulation Test Voltage 1500 V (AC)
Size EP13 
IC Reference LT3575 & LT3748 
750311564
10 - 40 V (DC), 5 V, 3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 10 - 40 V (DC)
Output Voltage 1 5 V
Output Current 1 3 A
Auxiliary Voltage 8 V
Inductance 9.07 µH
Turns Ratio 3:1:1.75 
Saturation Current 8 A
Leakage Inductance 0.25 µH
Insulation Test Voltage 1500 V (AC)
Size EP13 
IC Reference LT3575 & LT3748 
750311624
10 - 40 V (DC), 15 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 10 - 40 V (DC)
Output Voltage 1 15 V
Output Current 1 1 A
Auxiliary Voltage 8 V
Inductance 9 µH
Turns Ratio 1.5:1:0.5 
Saturation Current 8 A
Leakage Inductance 0.25 µH
Insulation Test Voltage 1500 V (AC)
Size EP13 
IC Reference LT3575 & LT3748 
750310559
12 - 30 V (DC), 3.3 V, 1.3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 12 - 30 V (DC)
Output Voltage 1 3.3 V
Output Current 1 1.3 A
Auxiliary Voltage 5 V
Inductance 24 µH
Turns Ratio 4:1:1 
Saturation Current 2.1 A
Leakage Inductance 0.5 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3573 & LT3575 
750310564
12 - 30 V (DC), 5 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 12 - 30 V (DC)
Output Voltage 1 5 V
Output Current 1 1 A
Output Voltage 2 -5 V
Output Current 2 1 A
Auxiliary Voltage 5 V
Inductance 63 µH
Turns Ratio 3:1:1:1 
Saturation Current 1.45 A
Leakage Inductance 0.6 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3574 & LT3573 & LT3575 
750311486
12 V (DC), 200 V, 0.002 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 12 V (DC)
Output Voltage 1 200 V
Output Current 1 0.002 A
Output Voltage 2 -200 V
Output Current 2 0.002 A
Auxiliary Voltage 4 V
Inductance 100 µH
Turns Ratio 1:10:10:0.219 
Saturation Current 2 A
Leakage Inductance 4.5 µH
Insulation Test Voltage 1500 V (AC)
Size EP13 
IC Reference LT3748 
750311681
12 V (DC), 200 V, 0.002 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 12 V (DC)
Output Voltage 1 200 V
Output Current 1 0.002 A
Output Voltage 2 -200 V
Output Current 2 0.002 A
Inductance 100 µH
Turns Ratio 1:10:10 
Saturation Current 2 A
Leakage Inductance 3 µH
Insulation Test Voltage 1500 V (AC)
Size EP13 
IC Reference LT3748 
750310988
12 V (DC), 48 V, 0.85 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 12 V (DC)
Output Voltage 1 48 V
Output Current 1 0.85 A
Inductance 14 µH
Turns Ratio 1:4.42 
Saturation Current 15 A
Leakage Inductance 0.2 µH
Insulation Test Voltage 1500 V (AC)
Size EFD25 
IC Reference LT3748 
750310562
18 - 30 V (DC), 12 V, 0.8 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 18 - 30 V (DC)
Output Voltage 1 12 V
Output Current 1 0.8 A
Auxiliary Voltage 12 V
Inductance 25 µH
Turns Ratio 2:1:1 
Saturation Current 2.8 A
Leakage Inductance 0.5 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3573 & LT3575 
750310563
18 - 30 V (DC), 12 V, 0.8 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 18 - 30 V (DC)
Output Voltage 1 12 V
Output Current 1 0.8 A
Auxiliary Voltage 6 V
Inductance 25 µH
Turns Ratio 1:1:0.5 
Saturation Current 2.8 A
Leakage Inductance 0.5 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3573 & LT3575 
750311797
18 - 100 V (DC), 12 V, 2.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 18 - 100 V (DC)
Output Voltage 1 12 V
Output Current 1 2.5 A
Auxiliary Voltage 12 V
Inductance 14 µH
Turns Ratio 2.5:1:1 
Saturation Current 11.5 A
Leakage Inductance 0.21 µH
Insulation Test Voltage 4000 V (AC)
Size EFD20 
IC Reference LT3748 
750311385
18 - 60 V (DC), 13 V, 2.3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 18 - 60 V (DC)
Output Voltage 1 13 V
Output Current 1 2.3 A
Auxiliary Voltage 14 V
Inductance 15 µH
Turns Ratio 1.25:1:1.1 
Saturation Current 6.75 A
Leakage Inductance 0.2 µH
Insulation Test Voltage 1500 V (AC)
Size EFD20 
IC Reference LT3748 
750311783
19 - 70 V (DC), 24 V, 2.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 19 - 70 V (DC)
Output Voltage 1 24 V
Output Current 1 2.5 A
Auxiliary Voltage 12 V
Inductance 20 µH
Turns Ratio 1.5:1:0.5 
Saturation Current 16 A
Leakage Inductance 0.225 µH
Insulation Test Voltage 1500 V (AC)
Size EFD25 
IC Reference LT3748 
750311597
20 - 48 V (DC), 5 V, 6 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 20 - 48 V (DC)
Output Voltage 1 5 V
Output Current 1 6 A
Auxiliary Voltage 10 V
Inductance 6 µH
Turns Ratio 3:1:2 
Saturation Current 9.5 A
Leakage Inductance 0.3 µH
Insulation Test Voltage 1500 V (AC)
Size EFD20 
IC Reference LT3748 
750311598
20 - 48 V (DC), 12 V, 2.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 20 - 48 V (DC)
Output Voltage 1 12 V
Output Current 1 2.5 A
Auxiliary Voltage 10 V
Inductance 8.3 µH
Turns Ratio 2:1:0.8 
Saturation Current 9 A
Leakage Inductance 0.3 µH
Insulation Test Voltage 1500 V (AC)
Size EFD20 
IC Reference LT3748 
750311599
20 - 48 V (DC), 15 V, 2 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 20 - 48 V (DC)
Output Voltage 1 15 V
Output Current 1 2 A
Auxiliary Voltage 10 V
Inductance 8 µH
Turns Ratio 1.5:1:0.67 
Saturation Current 12 A
Leakage Inductance 1 µH
Insulation Test Voltage 1500 V (AC)
Size EFD20 
IC Reference LT3748 
750311604
20 - 48 V (DC), 24 V, 1.3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 20 - 48 V (DC)
Output Voltage 1 24 V
Output Current 1 1.3 A
Auxiliary Voltage 10 V
Inductance 8 µH
Turns Ratio 1:1:0.42 
Saturation Current 9.5 A
Leakage Inductance 0.4 µH
Insulation Test Voltage 1500 V (AC)
Size EFD20 
IC Reference LT3748 
750311589
20 - 48 V (DC), 5 V, 9 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 20 - 48 V (DC)
Output Voltage 1 5 V
Output Current 1 9 A
Auxiliary Voltage 10 V
Inductance 6 µH
Turns Ratio 3:1:2 
Saturation Current 18 A
Leakage Inductance 0.4 µH
Insulation Test Voltage 1500 V (AC)
Size EFD25 
IC Reference LT3748 
750311591
20 - 48 V (DC), 15 V, 3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 20 - 48 V (DC)
Output Voltage 1 15 V
Output Current 1 3 A
Auxiliary Voltage 10 V
Inductance 8 µH
Turns Ratio 1.5:1:0.67 
Saturation Current 20 A
Leakage Inductance 0.4 µH
Insulation Test Voltage 1500 V (AC)
Size EFD25 
IC Reference LT3748 
750311590
20 - 48 V (DC), 12 V, 3.8 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 20 - 48 V (DC)
Output Voltage 1 12 V
Output Current 1 3.8 A
Auxiliary Voltage 10 V
Inductance 8 µH
Turns Ratio 2:1:1 
Saturation Current 18 A
Leakage Inductance 0.4 µH
Insulation Test Voltage 1500 V (AC)
Size EFD25 
IC Reference LT3748 
750311592
20 - 48 V (DC), 24 V, 1.9 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 20 - 48 V (DC)
Output Voltage 1 24 V
Output Current 1 1.9 A
Auxiliary Voltage 10 V
Inductance 8 µH
Turns Ratio 1:1:0.44 
Saturation Current 18 A
Leakage Inductance 0.4 µH
Insulation Test Voltage 1500 V (AC)
Size EFD25 
IC Reference LT3748 
750311889
28 V (DC), 250 V, 0.1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 28 V (DC)
Output Voltage 1 250 V
Output Current 1 0.1 A
Inductance 37 µH
Turns Ratio 1:2.5:2.5 
Saturation Current 2.95 A
Leakage Inductance 0.16 µH
Insulation Test Voltage 500 V (AC)
Size EFD25 
IC Reference LT3748 
750311605
30 - 75 V (DC), 5 V, 6 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 30 - 75 V (DC)
Output Voltage 1 5 V
Output Current 1 6 A
Auxiliary Voltage 10 V
Inductance 15 µH
Turns Ratio 3.5:1:2 
Saturation Current 9.5 A
Leakage Inductance 0.55 µH
Insulation Test Voltage 1500 V (AC)
Size EFD20 
IC Reference LT3748 
750311607
30 - 75 V (DC), 12 V, 2.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 30 - 75 V (DC)
Output Voltage 1 12 V
Output Current 1 2.5 A
Auxiliary Voltage 10 V
Inductance 14 µH
Turns Ratio 2.5:1:0.83 
Saturation Current 9.5 A
Leakage Inductance 0.5 µH
Insulation Test Voltage 1500 V (AC)
Size EFD20 
IC Reference LT3748 
750311600
30 - 75 V (DC), 15 V, 2 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 30 - 75 V (DC)
Output Voltage 1 15 V
Output Current 1 2 A
Auxiliary Voltage 10 V
Inductance 12 µH
Turns Ratio 2:1:0.67 
Saturation Current 11 A
Leakage Inductance 0.4 µH
Insulation Test Voltage 1500 V (AC)
Size EFD20 
IC Reference LT3748 
750311608
30 - 75 V (DC), 24 V, 1.3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 30 - 75 V (DC)
Output Voltage 1 24 V
Output Current 1 1.3 A
Auxiliary Voltage 10 V
Inductance 12 µH
Turns Ratio 1.5:1:0.5 
Saturation Current 9 A
Leakage Inductance 1 µH
Insulation Test Voltage 1500 V (AC)
Size EFD20 
IC Reference LT3748 
750311593
30 - 75 V (DC), 5 V, 9 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 30 - 75 V (DC)
Output Voltage 1 5 V
Output Current 1 9 A
Auxiliary Voltage 10 V
Inductance 15 µH
Turns Ratio 3.5:1:2 
Saturation Current 18 A
Leakage Inductance 0.4 µH
Insulation Test Voltage 1500 V (AC)
Size EFD25 
IC Reference LT3748 
750311595
30 - 75 V (DC), 15 V, 3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 30 - 75 V (DC)
Output Voltage 1 15 V
Output Current 1 3 A
Auxiliary Voltage 10 V
Inductance 12 µH
Turns Ratio 2:1:0.8 
Saturation Current 16 A
Leakage Inductance 0.4 µH
Insulation Test Voltage 1500 V (AC)
Size EFD25 
IC Reference LT3748 
750311594
30 - 75 V (DC), 12 V, 3.8 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 30 - 75 V (DC)
Output Voltage 1 12 V
Output Current 1 3.8 A
Auxiliary Voltage 10 V
Inductance 15 µH
Turns Ratio 2.33:1:0.83 
Saturation Current 18 A
Leakage Inductance 0.55 µH
Insulation Test Voltage 1500 V (AC)
Size EFD25 
IC Reference LT3748 
750311596
30 - 75 V (DC), 24 V, 1.9 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 30 - 75 V (DC)
Output Voltage 1 24 V
Output Current 1 1.9 A
Auxiliary Voltage 10 V
Inductance 12 µH
Turns Ratio 1.5:1:0.5 
Saturation Current 18 A
Leakage Inductance 0.4 µH
Insulation Test Voltage 1500 V (AC)
Size EFD25 
IC Reference LT3748 
750311305
36 V (DC), 12 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 12 V
Output Current 1 1 A
Auxiliary Voltage 8 V
Inductance 50 µH
Turns Ratio 3:1:0.67 
Saturation Current 2.8 A
Leakage Inductance 2 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3575 
750311307
36 V (DC), 24 V, 0.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 24 V
Output Current 1 0.5 A
Auxiliary Voltage 8 V
Inductance 100 µH
Turns Ratio 2:1:0.33 
Saturation Current 1.9 A
Leakage Inductance 3 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3574 & LT3575 
750311303
36 V (DC), 5 V, 3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 5 V
Output Current 1 3 A
Auxiliary Voltage 10 V
Inductance 50 µH
Turns Ratio 5:1:2 
Saturation Current 2.25 A
Leakage Inductance 1.5 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3575 
750311304
36 V (DC), 5 V, 3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 5 V
Output Current 1 3 A
Auxiliary Voltage 10 V
Inductance 50 µH
Turns Ratio 4:1:1.5 
Saturation Current 2.4 A
Leakage Inductance 1.5 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3574 & LT3575 
750311342
36 V (DC), 5 V, 3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 5 V
Output Current 1 3 A
Auxiliary Voltage 10 V
Inductance 15 µH
Turns Ratio 2:1:2 
Saturation Current 5.8 A
Leakage Inductance 0.65 µH
Insulation Test Voltage 1500 V (AC)
Size EP10 
IC Reference LT3575 
750311424
36 V (DC), 12 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 12 V
Output Current 1 1 A
Auxiliary Voltage 8 V
Inductance 100 µH
Turns Ratio 3:1:0.667 
Saturation Current 2.4 A
Leakage Inductance 1.5 µH
Insulation Test Voltage 1500 V (AC)
Size EP13 
IC Reference LT3748 
750311456
36 V (DC), 12 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 12 V
Output Current 1 1 A
Auxiliary Voltage 8 V
Inductance 100 µH
Turns Ratio 3:1:0.667 
Saturation Current 2.4 A
Leakage Inductance 1.5 µH
Insulation Test Voltage 2500 V (AC)
Size EP13 
IC Reference LT3748 
750311458
36 V (DC), 3.3 V, 4 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 3.3 V
Output Current 1 4 A
Auxiliary Voltage 8 V
Inductance 15 µH
Turns Ratio 3:1:2.5 
Saturation Current 5 A
Leakage Inductance 0.3 µH
Insulation Test Voltage 2500 V (AC)
Size EP13 
IC Reference LT3575 & LT3748 
750311422
36 V (DC), 5 V, 4 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 5 V
Output Current 1 4 A
Auxiliary Voltage 10 V
Inductance 50 µH
Turns Ratio 5:1:2 
Saturation Current 3.3 A
Leakage Inductance 1.2 µH
Insulation Test Voltage 1500 V (AC)
Size EP13 
IC Reference LT3575 & LT3748 
750311423
36 V (DC), 5 V, 4 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 5 V
Output Current 1 4 A
Auxiliary Voltage 10 V
Inductance 50 µH
Turns Ratio 4:1:2 
Saturation Current 3.85 A
Leakage Inductance 1.2 µH
Insulation Test Voltage 1500 V (AC)
Size EP13 
IC Reference LT3575 & LT3748 
750311457
36 V (DC), 5 V, 4 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 5 V
Output Current 1 4 A
Auxiliary Voltage 10 V
Inductance 50 µH
Turns Ratio 4:1:2 
Saturation Current 3.7 A
Leakage Inductance 1.2 µH
Insulation Test Voltage 2500 V (AC)
Size EP13 
IC Reference LT3575 & LT3748 
750311688
36 V (DC), 5 V, 4 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 5 V
Output Current 1 4 A
Auxiliary Voltage 10 V
Inductance 50 µH
Turns Ratio 5:1:2 
Saturation Current 3.1 A
Leakage Inductance 1.2 µH
Insulation Test Voltage 1500 V (AC)
Size EP13 
IC Reference LT3575 & LT3748 
750311689
36 V (DC), 5 V, 4 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 36 V (DC)
Output Voltage 1 5 V
Output Current 1 4 A
Auxiliary Voltage 10 V
Inductance 50 µH
Turns Ratio 4:1:2 
Saturation Current 3.7 A
Leakage Inductance 1.2 µH
Insulation Test Voltage 2500 V (AC)
Size EP13 
IC Reference LT3575 & LT3748 
750311439
37 - 57 V (DC), 12 V, 2.1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 37 - 57 V (DC)
Output Voltage 1 12 V
Output Current 1 2.1 A
Auxiliary Voltage 12 V
Inductance 37 µH
Turns Ratio 2:1:1.1 
Saturation Current 2.8 A
Leakage Inductance 0.75 µH
Insulation Test Voltage 1500 V (AC)
Size EP13 
IC Reference LT3575 & LT3748 
750311771
100 - 400 V (DC), 15 V, 3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 100 - 400 V (DC)
Output Voltage 1 15 V
Output Current 1 3 A
Auxiliary Voltage 15 V
Inductance 500 µH
Turns Ratio 3:3:1:1 
Saturation Current 2.5 A
Leakage Inductance 10 µH
Insulation Test Voltage 2000 V (AC)
Size EFD25 
IC Reference LT3748 
750811048
120 - 375 V (DC), 30 V, 0.3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 120 - 375 V (DC)
Output Voltage 1 30 V
Output Current 1 0.3 A
Auxiliary Voltage 15 V
Inductance 1500 µH
Turns Ratio 4.53:1:0.5 
Saturation Current 0.65 A
Leakage Inductance 35 µH
Insulation Test Voltage 4500 V (AC)
Size EE16/8/5 
IC Reference LT3748 

Comments

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