DER-57
Industrial – LNK501P
April 20, 2005
7.4 Transformer Build Diagram
Finish - pin 1
W3
Start - pin 4
Finish - pin 4
W2
Start - pin 3
Finish - pin 6
W1
Start - pin 5
Figure 5 – Transformer Build Diagram
7.5 Transformer Construction
All windings should be wound in the forward direction.
Bobbin
Place the bobbin on the winding machine with pins 1-4 on the
right side and pins 5-8 on the left side.
Wind 22 turns from right to left with # 32 triple-insulated
magnet wire starting from pin 5 and finishing to pin 6.
One layer of tape for insulation.
orientation
W1 (Secondary
Winding)
Insulation
W2 (Primary)
Wind 18 turns from right to left with 2 x # 30 bifilar magnet
wires starting from pin 3 and finishing to pin 4.
Three layer of tape for insulation.
Insulation
W3 (Primary)
Wind 99 turns from right to left with # 36 magnet wire starting
from pin 3 and finishing to pin 1.
Outer Insulation
Core Assembly
Final Assembly
3 layers of tape for insulation.
Assemble and secure core halves.
Vanish transformer – Do not impregnate.
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
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