FSFR2100U_10 Datasheet, PDF (15/18 Pages) Fairchild Semiconductor – Fairchild Power Switch (FPS) for Half-Bridge Resonant Converters

Typical Application Circuit (Continued)
Usually, LLC resonant converters require large leakage inductance value. To obtain a large leakage inductance,
sectional winding method is used.
ƒ Core: EER3542 (Ae=107 mm²)
ƒ Bobbin: EER3542 (Horizontal)
EC35
2 ^Np
6
13 _Ns2
12 _Ns1
10
9
Figure 30. Transformer Construction
Pins (S → F)
Np
8→1
Ns1
12 → 9
Ns2
16 → 13
Wire
0.12φ×30 (Litz Wire)
0.1φ×100 (Litz Wire)
0.1φ×100 (Litz Wire)
Turns
36
4
4
Note
Bifilar Winding
Bifilar Winding
Primary-Side Inductance (Lp)
Primary-Side Effective Leakage (Lr)
Pins
1－8
1－8
Specifications
630μH ± 5%
135μH ± 5%
Remark
100kHz, 1V
Short One of the secondary Windings
© 2007 Fairchild Semiconductor Corporation
FSFR series Rev.1.0.9
15
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