750311439 Wurth Electronics Inc, 750311439 Datasheet - Page 4

• Manufacturer Part Number: 750311439
• Description: TRANS FLYBACK LT3748LT3575 37UH
• Manufacturer: Wurth Electronics Inc
• Series: WE-FBr
• Type: For DC/DC Convertersr

Specifications of 750311439

• Applications: Flyback Converters
• Intended Chipset: LT3573, LT3574, LT3575, LT3748
• Voltage - Primary: 37 ~ 57V
• Voltage - Auxillary: 12V @ 30mA
• Voltage - Isolation: 1500Vrms
• Frequency: 250kHz
• Operating Temperature: -40°C ~ 130°C
• Mounting Type: Surface Mount
• Footprint: 0.70" x 0.53" (17.8mm x 13.5mm)
• Height Above Board: 0.50" (12.7mm)
• Chipset Manufacturer: Linear Technology
• Inductance: 37µH
• Transformer Type: Isolation and Data Interface (Encapsulated)
• Turns Ratio - Primary:secondary: 2 : 1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• E.t.: -
• Other names: 732-2644-2

04
WE-PMI
Power Multilayer Inductor
Size 1008 (Low DCR) / Size 1008 (High Current)
Electrical properties: Size 1008 (Low DCR)
Order Code
744 797 871 47
744 797 872 10
744 797 872 15
744 797 872 22
744 797 872 33
744 797 872 47
I
Inductance vs. Current
Electrical properties: Size 1008 (High Current)
Order Code
744 798 872 10
744 798 872 22
744 798 872 47
744 798 872 68
744 798 873 10
I
Inductance vs. Current
R
R
www.we-online.com
referring to self-heating, I
referring to self-heating, I
sat
sat
Inductance
referring to inductance loss of 30%
Inductance
referring to inductance loss of 30%
10
100
1
0
10
±20%
±20%
1
0
(µH)
0.47
(µH)
1
1.0
1.5
2.2
3.3
4.7
1.0
2.2
4.7
6.8
10
1
10 µH
4.7 µH
1.0 µH
1.0 µH
2.2 µH
0.47 µH
2.2 µH
min.
min.
15
15
15
15
20
20
15
19
26
30
35
3.3 µH
Q
Q
4.7 µH
6.8 µH
1.5 µH
10
10
Frequency
Frequency
(MHz)
(MHz)
Test
Test
1
1
Strom/DC Current (mA)
Strom/DC Current (mA)
±30%
±30%
(mΩ)
(mΩ)
DCR
DCR
120
100
110
290
400
530
650
700
100
90
70
80
100
I
I
R
R
(mA)
1500
2000
1200
1100
(mA)
@ 20K
@ 20K
950
850
600
550
450
350
300
1000
1000
I
I
R
R
(mA)
1900
2500
1600
1500
1350
1250
(mA)
1000
@ 40K
@ 40K
850
750
700
650
(mA)
(mA)
1200
1100
700
500
800
700
400
250
850
600
350
10000
10000
I
I
sat
sat
(MHz)
(MHz)
min.
min.
SRF
110
SRF
100
90
70
60
50
40
70
50
40
30
3000
3000
Qty.
Qty.
Dimensions (in mm)
Land pattern (in mm)
Dimensions (in mm)
Land pattern (in mm)
0,8
0,8
2,5 ±0,3
2,5 ±0,3
0,5 ±0,3
0,5 ±0,3
1,2
1,2
0,8
0,8
11/10