FAN7621B Fairchild Semiconductor, FAN7621B Datasheet - Page 15

• Manufacturer Part Number: FAN7621B
• Description: The FAN7621B is a pulse frequency modulation controller for high-efficiency half-bridge resonant converters
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN7621B • Rev. 1.0.1
Typical Application Circuit
Usually, LLC resonant converters require large leakage inductance value. To obtain a large leakage inductance,
sectional winding method is used.
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Primary-Side Effective Leakage (L
Core: EC35 (Ae=106 mm
Bobbin: EC35 (Horizontal)
Transformer Model Number: SNX-2468-1
N
N
N
Primary-Side Inductance (L
s1
s2
p
2
6
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N
p
Pins (S → F)
EC35
10 → 13
12 → 9
6 → 2
10
13
12
9
2
)
N
N
p
s2
s1
)
or [phone] (Sunnyvale, California USA).
r
)
(Continued)
Figure 30. Transformer Construction
0.08φ×234 (Litz Wire)
0.08φ×234 (Litz Wire)
0.08φ×88 (Litz Wire)
Pins
2－6
2－6
Wire
Specifications
550μH ± 10%
110μH ± 10%
15
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Turns
36
Short one of the secondary windings
4
4
100kHz, 1V
Remark
Bifilar Winding
Bifilar Winding
Note
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or