750311305 Wurth Electronics Inc, 750311305 Datasheet - Page 12

• 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

12
WE-TDC
SMD Coupled Inductor
Size 8018
Electrical properties
Order Code
744 894 300 033
744 894 300 068
744 894 300 10
744 894 300 22
744 894 300 27
744 894 300 39
744 894 300 56
744 894 300 68
744 894 301 00
744 894 301 20
744 894 301 50
744 894 301 80
744 894 302 20
I
I
Inductance vs. Current
R
sat
www.we-online.com
40 K over ambient temperature when both windings in series are energized by rated current mentioned.
inductance drop of 10% typ when energizing one winding by I
25
20
15
10
5
0
0.1
currents up to 14 A
Height 1.8 mm and
Inductance
(µH)
0.33
0.68
1.00
2.20
2.70
3.90
5.60
6.80
10.0
12.0
15.0
18.0
22.0
DCR typ.
Strom/current (A)
(mΩ)
11.1
16.3
22.2
49.5
69.5
82.0
114
128
190
202
275
345
435
sat
mentioned.
1
DCR max.
(mΩ)
15.0
21.0
28.0
58.0
80.5
94.0
131
146
215
227
308
380
480
7 7
7 7
7 7
7 7
7 7
7 7
7 7
7 7
7 7
7 7
Characteristics
Core material: NiZn
Low profile
Magnetical shielded which results in a low leakage
field
8x8 mm case
1:1 transformer
Low self-losses
High self resonance frequency
Coupled inductor with two identical windings
Recommended solder profile: Reflow
Operating temperature: –40 °C up to +125 °C
I
R
4.00
3.30
2.85
1.90
1.85
1.60
1.45
1.25
1.00
0.95
0.85
0.80
0.70
max.
(A)
10
I
sat
9.00
6.50
5.10
3.50
3.00
2.55
2.20
2.00
1.65
1.55
1.25
1.20
1.10
(A)
typ.
(MHz)
744 894 300 033
744 894 300 068
744 894 300 10
744 894 300 22
744 894 300 27
744 894 300 39
744 894 300 56
744 894 300 68
744 894 301 00
744 894 301 20
744 894 301 50
744 894 301 80
744 894 302 20
SRF
280
190
136
85
65
60
50
46
35
33
29
27
17
Qty.
550
7 7
7 7
7 7
7 7
Dimensions (in mm)
Land pattern (in mm)
Schematic
2
Applications
Non-isolated flyback converter
Buck or Boost with AUX winding
BUCK-BOOST, SEPIC, ZETA & CUK Converter
Switching regulators with secondary unregulated
output voltages
8,0 ±0,3
1,0 typ.
1
3
3
1
4
4x 3,6
3,2 typ.
4
2
11/10