EPR-16 datasheet(16/36 Pages) POWERINT

16 / 36 page

EPR-16 - LinkSwitch 2.75 W Charger/Adapter

17-May-04

7.5 Transformer Construction

Secondary Winding

Start at Pin 4 temporarily. Wind 15 turns of item [5] from right to left with

tight tension. Wind uniformly, in a single layer across entire width of

bobbin. Finish on Pin 6.

Basic Insulation

1 Layer of tape [6] for insulation.

Secondary Winding

Change the start pin connection of secondary winding from Pin 4 to Pin 5.

Basic Insulation

1 Layer of tape [6] for insulation.

Cancellation

Winding

Start at Pin 3. Wind 12 turns of bifilar item [4] from right to left with tight

tension. Wind uniformly, in a single layer, across entire width of bobbin.

Finish on Pin 4.

Basic Insulation

1 Layer of tape [6] for insulation.

Primary Winding

2 2/3 Layer

Start at Pin 4. Wind 104 turns of item [3] from right to left in 2 and 2/3

layers across entire width of bobbin. Wind all layers with tight tension.

Finish on Pin 1.

Outer Insulation

10 Layer of tape [7] for insulation.

Core Assembly

Assemble and secure core halves using item [8]

Flux / Belly band

Place item [9] around outside of windings and core halves with tight

tension. Make electrical connection to band from pin 3 using item [4].

Basic Insulation

2 layers of tape [6] for insulation.

Crop Unused Pins

Remove pins 7 and 8

Note: The transformer is an integral part of the EMI performance of this design. Changes

to the transformer may have significant impact on both conducted and radiated EMI.

Page 16 of 36

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EPR-16 Fiches technique(PDF) 16 Page - Power Integrations, Inc.