RDK-249 Power Integrations, RDK-249 Datasheet - Page 19

• Manufacturer Part Number: RDK-249
• Description: KIT REF DESIGN PFS762HG
• Manufacturer: Power Integrations
• Series: HiperTFS®r

Specifications of RDK-249

• Main Purpose: Reference Design, PC Power Supply
• Embedded: No
• Utilized Ic / Part: TFS762HG
• Primary Attributes: 12V 25A, 5V 2.9A Outputs, 300 ~ 385 VDC Input
• Output Voltage: 5 V
• Input / Supply Voltage (max): 385 VDC
• Input / Supply Voltage (min): 300 VDC
• Duty Cycle (max): 50 %
• Mounting Style: Through Hole
• Output Current: 2.9 A
• Output Power: 14.5 W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Other names: 596-1398

8.5 Transformer Construction
Page 19 of 48
WD1: 1
Winding Preparation
WD2: Secondary
WD3: Support
WD4: 2
Margin Tape
Margin Tape
Margin Tape
Copper Foil
Insulation
Insulation
Insulation
Insulation
Primary
st
Finish
Half Primary
nd
Half
Position the bobbin on the mandrel such that the pin side is on the left side of
bobbin mandrel. Winding direction is clock-wise direction
Place margin tape 6.0 mm item [9] for the left side and 3.0 mm item [8] for the
right side matching with height of WD1
Start at pin 2, wind 44 turns of wire item [3] from left to right and right to left in 1
½ layers and terminate at pin 4
2 layers of tape item [6]
Prepare the copper foil as in above figure
Use copper foil item [5], start at pins 13, 14, wind 7 turns with tight tension and
end at pins 9, 10
2 layers of tape item [6]
Place margin tape 6.0mm item [9] for the left side and 3.0mm item [8] for the
right side matching with height of WD3
Start at pin 1, wind 5 turns item [4] from left to right, at the last turn bring the
wire back to the left to terminate at pin 2
2 layers of tape item [6]
Place margin tape 6.0 mm item [9] for the left side and 3.0 mm item [8] for the
right side matching with height of WD4
Start at pin 4, wind 44 turns of wire item [3] from left to right and right to left in 1
½ layers and terminate at pin 6
2 layers of tape item [6]
Assemble and secure the cores with tape. Varnish item [7]
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