EPR-29 Datasheet, PDF (13/36 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP-29 - Multiple Output 11 W (15.5 W peak) AC-DC Power Supply using TNY268P

07-July-03
EPR-29 – 4 Output, 11 W, Universal Input, DVD Supply
W6 and W7 +3.3 V
and +5 V outputs.
Basic Insulation
W7 -12 V output.
Outer Insulation
Core Assembly
Belly band/
Flux band
Outer Insulation
Final Assembly
Prepare copper foil item [5] and item [7] as shown in Figure 6. Start at pin 11
using item [4] at the start leads. Wind 2 turns. Connect the second lead to pin
9 using item [4] at the finish leads. Wind 1 turn. Connect the end lead to pin
13 using item [4] at the finish leads.
Apply one layer of tape item [6].
Start at pin 14 using item [4] at the start leads. Wind 7 turns of 4 parallel wires
of item [3]. Wind tightly from right to left in a uniform spread across the bobbin
width. Finish on pin 12 using item [4] at the finish leads.
3 Layers of tape [7] for insulation.
Assemble and secure core halves. Item [1].
Wind copper tape item [9] outside of core halves.
Wrap the core right over the belly band with three layers item [7].
Dip varnish uniformly in item [10]. Do not vacuum impregnate. Note: vacuum
impregnation may require re-optimization of shield windings for acceptable
EMI performance.
Page 13 of 36
Power Integrations, Inc.
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