FSFM261 Fairchild Semiconductor, FSFM261 Datasheet - Page 15

• Manufacturer Part Number: FSFM261
• Description: The FSFM260N/261N/300N is an integrated Pulse Width Modulator (PWM) and SenseFET specifically designed for high-performance offline Switch Mode Power Supplies (SMPS) with minimal external components
• Manufacturer: Fairchild Semiconductor

FSFM260N / FSFM261N / FSFM300N • Rev. 1.0.1
© 2009 Fairchild Semiconductor Corporation
2. Transformer
3. Winding Specification
4. Electrical Characteristics
5. Core & Bobbin
!
!
Position
Bottom
Core: EER3016 (Ae=109.7mm
Bobbin: EER3016
Top
N
N
p
p
N
/2
/2
a
3
4
5
2
1
Inductance
Insulation: Polyester Tape t = 0.025mm, Two Layers
Leakage
Insulation: Polyester Tape t = 0.025mm, Three Layers
Insulation: Polyester Tape t = 0.025mm, Three Layers
Insulation: Polyester Tape t = 0.025mm, Three Layers
Insulation: Polyester Tape t = 0.025mm, Three Layers
Insulation: Polyester Tape t = 0.025mm, Three Layers
N
N
N
N
N
EER3016
No
N
14V
p
p
5V
5V
a
/2
/2
10
7
6
9
8
Pin (s→f)
N
N
N
GND
14V
5V
5V
10 → 8
2
2 → 1
3 → 2
8 → 6
7 → 6
7 → 6
)
Figure 25. Transformer Schematic Diagram
1 - 3
1 - 3
Pin
N
N
N
N
N
N
p
14V
p
5V
5V
/2
/2
a
10
0.4
0.4
0.4
4
7
8
8
2
3
2
0.25
0.15
0.25
φ
φ
φ
Wire
× 2(TIW)
× 3(TIW)
× 3(TIW)
15
φ
φ
φ
× 1
× 1
× 1
15µH Maximum
Specification
1.2mH ± 10%
Turns
30
19
5
3
3
7
Two-Layer Solenoid Winding
Solenoid Winding
Solenoid Winding
Solenoid Winding
Center Solenoid Winding
Center Solenoid Winding
Winding Method
Short all other pins
Remarks
67kHz, 1V
Bottom
Top
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1
5
6
6