FAN7631 Fairchild Semiconductor, FAN7631 Datasheet - Page 17

• Manufacturer Part Number: FAN7631
• Description: The FAN7631 is a pulse-frequency modulation controller for high-efficiency half-bridge resonant converters that includes a high-side gate drive circuit, an accurate current-controlled oscillator, and various protection functions
• Manufacturer: Fairchild Semiconductor

© 2011 Fairchild Semiconductor Corporation
FAN7631 • 1.0.2
Typical Application Circuit
Usually, the LLC resonant converter requires large leakage inductance value. To obtain a large leakage inductance,
sectional winding method is used.


Table 1. Winding Specifications
Primary-Side Inductance (L
Primary-Side Effective Leakage (L
Core: EER3542 (Ae=107 mm
Bobbin: EER3542 (Horizontal)
N
N
N
s1
s2
p
Pin (S → F)
16 → 13
12 → 9
8 → 1
P
)
2
R
)
)
(Continued)
Figure 45. Winding Specifications
0.12φ×30 (Litz Wire)
0.1φ×100 (Litz Wire)
0.1φ×100 (Litz Wire)
Pin
1-8
1-8
Wire
Np
Specification
145H ±5%.
17
630H ±5%
15mm
2.5mm
100kHz, 1V
Short One of the Secondary Windings
Turns
45
5
5
Remark
Winding Method
8mm
Section Winding
Section Winding
Section Winding
www.fairchildsemi.com
N
N
s2
s1