750311305 Wurth Electronics Inc, 750311305 Datasheet - Page 21

• Manufacturer Part Number: 750311305
• Description: TRANS FLYBACK LT3575 50UH SMD
• Manufacturer: Wurth Electronics Inc
• Series: WE-FBr
• Type: For DC/DC Convertersr

Specifications of 750311305

• Applications: Flyback Converters
• Intended Chipset: LT3573, LT3574, LT3575, LT3748
• Voltage - Primary: 9 ~ 30V
• Voltage - Auxillary: 8V @ 20mA
• Voltage - Isolation: 1500Vrms
• Frequency: 100kHz
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Footprint: 0.60" x 0.53" (15.2mm x 13.3mm)
• Height Above Board: 0.45" (11.4mm)
• Chipset Manufacturer: Linear Technology
• Inductance: 50µH
• Transformer Type: Isolation and Data Interface (Encapsulated)
• Turns Ratio - Primary:secondary: 3 : 1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• E.t.: -
• Other names: 732-2627-2

WE-FB
Flyback Transformer
LT3573 / LT3574 / LT3575 / LT3748
* Dependant on application, the transformer specification can differ slightly to data sheet
11/10
up to 3 W
Electrical properties* (sorted by power)
Reference to Linear Technology Specification
LT3574
LT3574
LT3574
LT3574
LT3574
LT3574
LT3574
up to 7 W
LT3573
LT3573
LT3573
LT3573
LT3573
LT3573
LT3573
LT3573
LT3573
LT3573
LT3573
LT3573
LT3573
up to 14 W
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
LT3575
external
MOSFET
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
LT3748
WE Order Code
750 311 691
750 310 799
750 370 040
750 370 041
750 370 047
750 370 058
750 370 059
750 311 692
750 370 042
750 310 471
750 310 559
750 310 562
750 310 563
750 310 564
750 311 486
750 811 048
750 311 889
750 311 303
750 311 304
750 311 305
750 311 306
750 311 307
750 311 308
750 311 675
750 311 567
750 311 424
750 311 456
750 311 458
750 311 564
750 311 624
750 311 625
750 311 856
750 311 342
750 311 911
750 311 422
750 311 423
750 311 439
750 311 457
750 311 688
750 311 689
750 311 385
750 310 617
750 311 597
750 311 598
750 311 599
750 311 600
750 311 604
750 311 605
750 311 607
750 311 608
750 311 797
750 311 589
750 311 590
750 311 591
750 311 592
750 311 593
750 311 594
750 311 595
750 311 596
750 311 771
750 310 988
750 311 783
Power
10–15
10–15
10–15
10–15
10–15
10–15
10–15
10–15
10–15
10–15
10–15
10–15
10–15
10–15
10–15
10–15
10–15
15–25
15–25
15–25
15–25
15–25
15–25
25–35
25–35
25–35
25–35
25–35
25–35
25–35
25–35
25–35
25–35
35–45
35–45
35–45
35–45
35–45
35–45
35–45
35–45
35–45
35–45
35–45
< 10
< 10
< 10
< 10
< 10
< 10
< 10
< 10
< 10
< 10
< 10
< 10
< 10
< 10
< 10
< 10
< 10
>45
(W)
EFD25
EFD20
EFD20
EFD20
EFD20
EFD20
EFD20
EFD20
EFD20
EFD20
EFD20
EFD20
EFD25
EFD25
EFD25
EFD25
EFD25
EFD25
EFD25
EFD25
EFD25
EFD25
EFD25
ER9.5
EP10
EP10
EP10
EP10
EP10
EP13
EE16
EP10
EP10
EP10
EP10
EP10
EP10
EP10
EP10
EP13
EP13
EP13
EP13
EP13
EP13
EP13
EE20
EP13
EP13
EP13
EP13
EP13
EP13
EP13
Core
EP5
EP7
EP7
EP7
EP7
EP7
EP7
EP7
100–400
100–400
18–100
18–30
18–30
18–30
18–30
18–30
18–30
12–30
18–30
18–30
12–30
10–40
10–40
10–40
10–40
16–24
16–24
37–57
18–60
20–48
20–48
20–48
30–75
20–48
30–75
30–75
30–75
20–48
20–48
20–48
20–48
30–75
30–75
30–75
30–75
19–70
8–15
8–15
9–30
9–30
9–30
9–30
9–30
9–30
9–30
9–30
9–36
(V)
U
12
28
36
36
36
36
36
36
36
36
36
12
5
in
All possible OFF THE SHELF transformer
4 x 15
4 x 15
±150
±200
±5.0
15.0
15.0
12.0
12.0
12.0
12.0
24.0
24.0
12.0
12.0
15.0
12.0
13.0
12.0
12.0
15.0
15.0
24.0
12.0
24.0
12.0
15.0
24.0
12.0
15.0
24.0
15.0
48.0
150
250
U
(V)
5.0
5.0
5.0
5.0
5.0
5.0
3.3
5.0
5.0
5.0
5.0
3.3
5.0
3.3
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
30
12
24
out
4 x 0.2
0.001
0.001
0.002
4x 0.2
0.30
0.85
(A)
0.4
1.0
1.0
1.0
0.4
1.0
0.2
1.0
1.3
0.5
0.4
1.0
0.1
3.0
3.0
1.0
1.0
0.5
0.5
2.0
3.0
1.0
1.0
4.0
3.0
1.0
4.0
3.0
4.0
4.0
2.1
4.0
4.0
4.0
2.3
3.0
6.0
2.5
2.0
2.0
1.3
6.0
2.5
1.3
2.5
9.0
3.8
3.0
1.9
9.0
3.8
3.0
1.9
3.0
2.5
I
out
Turns ratio
1:4:4:4:4
1:3:3:3:3
4.387:1
NP:NS
1.25:1
1:1.16
1:4.42
1.5:1
2:5:1
1.5:1
1:10
5:1
1:1
3:1
3:1
3:1
1:1
3:1
5:1
1:1
3:1
4:1
2:1
2:1
3:1
1:5
5:1
4:1
3:1
3:1
2:1
1:1
3:1
2:1
3:1
3:1
3:1
3:1
4:1
2:1
5:1
2:1
2:1
4:1
5:1
4:1
3:1
2:1
3:2
2:1
1:1
7:2
5:2
3:2
3:1
2:1
3:2
1:1
7:2
5:2
2:1
3:2
6:1
1500
(µH)
25.0
15.0
9.07
15.0
50.0
50.0
37.0
50.0
50.0
50.0
15.0
12.0
15.0
14.0
12.0
14.0
15.0
15.0
12.0
12.0
14.0
100
100
100
100
100
100
500
7.0
9.0
9.0
3.8
6.8
4.5
6.0
8.3
8.0
8.0
6.0
8.0
8.0
8.0
L
60
25
30
50
30
25
50
80
15
25
24
25
25
63
37
50
50
50
20
pri
Leakage
14000
1000
2000
4500
1200
1750
2000
2100
5000
(nH)
125
200
450
150
185
500
250
430
500
500
500
600
160
800
850
130
800
900
900
175
120
180
350
250
650
100
600
600
750
600
600
600
100
150
300
300
500
500
300
500
500
500
210
200
200
200
200
300
400
200
200
200
170
www.we-online.com
IEC61558-2-12
Isolation
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
2500
2500
1500
1500
1500
1000
1500
1500
1500
1500
1500
2500
1500
2500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
4000
1500
1500
1500
1500
1500
1500
1500
1500
2500
1500
1500
500
(V)
0.25
0.65
2.95
2.25
1.65
11.2
>8.0
>8.0
3.85
6.75
12.0
11.0
11.5
18.0
18.0
20.0
18.0
18.0
18.0
16.0
18.0
>12
>15
(A)
2.0
1.7
1.6
1.7
2.0
1.6
1.0
1.5
2.6
2.1
2.8
2.8
2.0
2.5
2.8
1.9
2.1
2.5
2.4
2.4
5.0
8.0
5.8
3.3
2.8
3.7
3.1
3.7
9.5
9.0
9.5
9.5
9.5
9.0
2.5
I
16
sat
–
–
–
21