RDK-249 Power Integrations, RDK-249 Datasheet - Page 16

• 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

7.4 Transformer Build Diagram
7.5 Transformer Construction
WD4: 2
WD1: 1
WD3: Secondary
WD2: Auxiliary
Preparation
Insulation
Insulation
Insulation
Insulation
Winding
Finish
nd
st
Primary
Primary
Power Integrations, Inc.
Tel: [phone] Fax: [phone]
www.powerint.com
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
Start at pin 1, wind 33 turns of wire item [3] from left to right with tight tension in
one layer, at the last turn bring the wire back to the left and terminate at pin 4
2 layers of tape item [6]
Start at pin 3, wind 12 quad-filar turns of wire item [4] from left to right also with
tight tension in one layer, at the last turn bring the wire back to the left and
terminate at pin 5
2 layers of tape item [6]
Start at pin 9, 10 wind 4 bi-filar turns of wire item [5] from left to right also with
tight tension in one layer, at the last turn bring the wire back to the left and
terminate at pin 6, 7
2 layers of tape item [6]
Start at pin 4, wind 32 turns of wire item [3] from right to left with tight tension in
one layer, at the last turn bring the wire back to the right and terminate at pin 2
3 layers of tape item [6]
Assemble, grind the cores to get 2.15 mH and secure with tape. Varnish [7]
Figure 6 – Transformer Build Diagram.
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