FAN302HL Fairchild Semiconductor, FAN302HL Datasheet - Page 15

• Manufacturer Part Number: FAN302HL
• Description: This highly integrated PWM controller, FAN302HL, provides several features to enhance the performance of general flyback converters
• Manufacturer: Fairchild Semiconductor

© 2010 Fairchild Semiconductor Corporation
FAN302HL • Rev. 1.0.1
Typical Application Circuit
Transformer Specification
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Table 1. Transformer Turns Specifications
Primary-Side Inductance
Primary-Side Effective Leakage
NO
W1
W2
W3
W4
Core: EI12.5
Bobbin: EI12.5
W1 is four winds; for each wind of turns, refer to Table 1. Add one insulating tape layer between the first and
second layers.
W2 is wound two layers and uses triple-insulated wire: end of positive fly line is 3.5cm, layer end of negative fly
line is 2.5cm.
W3 is spares winding in one layer.
W4 is wound in the core of the outermost layer and sparse winding.
Secondary Winding
Start Pin
Fly+
4
1
2
Terminal
5
4
2
1
End Pin
Fly-
(Continued)
5
2
4－5
4－5
Pin
Figure 37.Transformer
CORE ROUNDING TAPE
BOBBIN
Specifications
15
TEX-E 0.45*1
2UEW 0.18*1
2UEW 0.18*1
700H ±7%
200H ±5%
2UEW 0.1*1
CORE
Wire
100kHz, 1V
Short one of the secondary windings.
Primary Winding
Auxiliary Winding
FLY–
FLY+
Turns
26
25
24
18
11
Remark
7
5
Insulation
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Turns
0
1
0
2
2
2
3
0
2