EPR-86 Datasheet, PDF (16/28 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP 86 - 6.6 W Multi-Class Powered Device (PD) for Power over Ethernet (PoE) Using DPA-Switch-(DPA423G)

EP-86 – 6.6 W, 3.3 V, 2 A PoE Powered Device
13-Apr-2006
8.4 Transformer Build Diagram
Tape
1
2
6,7
9,10
5
4
2
3
Tape
W4
Tape
W3
Tape
W2
Tape
W1
Figure 11 – Transformer Build Diagram.
8.5 Transformer Construction
Bobbin Preparation
W1
W2
Tape
W3
Tape
W4
Outer Wrap
Final Assembly
Arrange bobbin & rotation such that primary start/finish wires do not overlap.
Start at Pin 3. Wind 10 turns of item [3] in 1 layer. Bring finish lead back and
terminate on Pin 2.
Starting at Pin 4, wind 8 turns of item [3]. Spread turns evenly across bobbin in
a single layer. Bring finish lead back and terminate on Pin 5.
Use one layer of item [5] for basic insulation.
Start at Pins 9 and 10. Wind 2 turns of bifilar item [4] in 1 layer. Bring finish
lead back and terminate on Pins 6 and 7.
Use one layer of item [5] for basic insulation.
Continue from Pin 2. Wind 10 turns of item [3] in 1 layer. Bring finish lead back
and terminate on Pin 1.
Use one layer of item [5] for basic insulation.
Assemble and secure (glue or clamp, item [6]) core halves.
Dip varnish item [7] and cure.
Power Integrations
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www.powerint.com
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