EPR-29 Datasheet, PDF (12/36 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP-29 - Multiple Output 11 W (15.5 W peak) AC-DC Power Supply using TNY268P

EPR-29 – 4 Output, 11 W, Universal Input, DVD Supply
07-July-03
7.5 Copper Foil Preparation
The following figure shows the copper foils to be used for +3.3 V and +5 V outputs (W6
and W7)
Finish Pin 13
#26 Copper
Wire
45 mm
Connect Pin 9
#26 Copper
Wire
105 mm
Start Pin 11
+5 V_OUT 1T Copper Foil 14.0 mm
wide.
0.12 mm Thick.
+3.3 V_OUT 2T Copper Foil 14.0 mm
wide.
0.12 mm Thick.
Figure 6 – Foil Winding Preparation Diagram.
7.6 Winding Instructions
Bobbin Set Up
Orientation
Margin Tape
W1 First Shield
Basic Insulation
W2 Two Layers
Primary
Basic Insulation
W3 Bias
Basic Insulation
W4 Second shield.
Insulation
Margin Tape
W5 +12 V_OUT
Basic Insulation
Set up the bobbin with its pins oriented to the right hand side.
Apply 3.0 mm margin at each side of bobbin using item [8]. Match combined
height of primary, shield and bias windings.
Start with a floating lead. Wind 32 bifilar turns of item [3] from left to right.
Wind tightly and uniformly across entire width of bobbin. Finish at pin 5 using
item [4] at the finish leads. Cut the starting lead just at the starting of the
winding.
Apply one layer of tape item [6].
Start on pin 1 using item [4] at the start leads. Wind 32 bifilar turns of item [3]
from right to left . Apply one layer of item [6]. Continue the same wire on
second layer. Wind 32 turns from left to right. The two layers should be
wound tightly with the turns uniformly distributed across entire width of
bobbin. Finish on pin 4 using item [4] at the finish leads.
Apply one layer of tape item [6].
Start on pin 7 using item [4] at the start leads. Wind 6 turns of 4 parallel wires
of item [3]. Wind from right to left in a single layer. The wires should be wound
tightly and uniformly spread across the bobbin width. Finish on pin 6 using
item [4] at the finish leads.
Apply one layer of tape item [6].
Start with a floating lead. Wind 4 turns of 4 parallel wires of item [3]. Wind
from right to left in a single layer. The wires should be wound tightly and
uniformly spread across the bobbin width. Finish on pin 7 using item [4] at the
finish leads. Cut the starting lead just at the starting of the winding.
3 Layers of tape [7] for insulation.
Apply 3.0 mm margin at each side of bobbin using item [8]. Match combined
height of secondary windings.
Start on pin 13 using item [4] at the start leads. Wind tightly 4 turns of 4
parallel wires of item [3]. Wind from right to left in a single spread across the
bobbin width. Finish on pin 8 using item [4] at the finish leads.
Apply one layer of tape item [6].
Power Integrations, Inc.
Tel: [phone] Fax: [phone]
www.powerint.com
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