RDK-142 Power Integrations, RDK-142 Datasheet - Page 15

• Manufacturer Part Number: RDK-142
• Description: KIT REF DESIGN TOP HX FOR TOP258
• Manufacturer: Power Integrations
• Series: TOPSwitch®-HXr

Specifications of RDK-142

• Mfg Application Notes: TOPSwitch-HX Family Appl Note
• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 2, Non-Isolated
• Power - Output: 35W
• Voltage - Output: 5V, 12V
• Current - Output: 2.2A, 2A
• Voltage - Input: 90 ~ 265VAC
• Regulator Topology: Flyback
• Frequency - Switching: 30kHz
• Board Type: Fully Populated
• Utilized Ic / Part: TOP258
• Product: Accessories & Kits
• Silicon Manufacturer: Power Integrations
• Kit Application Type: Displays
• Application Sub Type: LCD Monitor
• Kit Contents: Samples, Fully Functional Reference Board And Complete Documentation
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 596-1193

6.5 Transformer Construction
Page 15 of 40
2
1
General Note
nd
1/2 Primary
st
2/2 Primary
Insulation
Insulation
Insulation
Insulation
Insulation
Assembly
Secondary
Secondary
Finish
WD1
WD2
WD3
WD4
WD5
Bias
Primary side of the bobbin orients to the left hand side. Place 3.1 mm margin tape
on both sides for all windings except WD1 due to built-in 3.1 mm margin of bobbin
[12]. Winding direction is clockwise.
Start on pin 4, wind 24 turns of item [3] from left to right with tight tension and bring
the wire across the bobbin to terminate at pin 3.
2 layers of tape item [5].
Start on pin 6, wind 7 turns bifilar of item [4] from left to right, spread the winding
evenly, and bring the wire across the bobbin to terminate on pin 5.
2 layers of tape item [5].
Start on pin 11, wind 3 turns of item [7] and terminate at pin 9.
1 layer of tape item [5].
Start on pin 7, wind 4 turns quadfilar of item [4] from right to left, spread the winding
evenly across the bobbin, and bring the wire back to the right to terminate on pin
11.
2 layers of tape item [5].
Start on pin 3, wind 23 turns of item [3] from left to right with tight tension, place 1
layer tape item [6], then wind another 23 turns of item [3] from right to left, also with
tight tension, and terminate at pin 2.
3 layers of tape item [5].
Grind the cores to get 1038 µH with ALG of 213 nH/T
Secure the cores by wrapping around 2 halves of cores with item [10]. Dip varnish
uniformly in item [11]
.
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2
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Power Integrations
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