Fairchild FSB127H, User Manual

Page: 14 / 15

© 2011 Fairchild Semiconductor Corporation 14 FEBFSB127H_T001 • Rev. 1.0.0
7. Transformer
7.1. Transformer Specification
EI - 22
N
p
/2
N
5V
N
a
1
2
3
4
5
6
10
N
p
/2
Core: EI-22 (Ae=37.5mm
2
)
Bobbin: EI-22
Figure 21. Transformer Specification
Table 1. Winding Specifications
Pins (S → F) Wire Turns Winding Method
N
p
/2 3 → 2 0.27 φ ×1 31 Solenoid Winding
Insulation: Polyester Tape t = 0.025mm, 3 Layer
N
5V
6 → 10 0.55 φ ×2 5 Solenoid Winding
Insulation: Polyester Tape t = 0.025mm, 3 Layers
N
p
/2 2 → 1 0.27 φ ×1 31 Solenoid Winding
Insulation: Polyester Tape t = 0.025mm, 6 Layers
N
a
4 → 5 0.15 φ ×1 12 Solenoid Winding
Insulation: Polyester Tape t = 0.025mm, 3 Layers
Table 2. Specifications
Pins Specifications Remark
Primary-Side Inductance 1
－
3 900µH ±10% 100kHz, 1V
Primary-Side Effective Leakage 1
－
3 < 30  H Max. Short All Other Pins