EPR-21 datasheet(11/32 Pages) POWERINT

Part #	EPR-21

Description	Engineering Prototype Report (EP-21) - 30 W DC-DC Converter with DPA424

PDF	32 Pages

Scroll/Zoom	100%

Manufacturer	POWERINT [Power Integrations, Inc.]

Direct Link	http://www.powerint.com

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11 / 32 page

19-Nov-02

EPR-21 – 5 V, 30 W DC-DC Converter

7.3 Transformer Build Diagram

½ Primary

Secondary

5, 6

7, 8

Tape

½ Primary

Figure 5

− EP-21 Transformer Build Diagram.

7.4 Transformer Construction

½ Primary

Start at Pin 4. Wind 8 turns of item [3] in 1 layer. Finish on Pin 3.

Basic Insulation

Use one layer of item [4] for basic insulation.

Secondary Winding

Start at Pins 5 and 6. Wind 4 quadrifilar turns of item [3]. Finish on Pins 7 and 8.

Basic Insulation

Use one layer of item [4] for basic insulation.

½ Primary

Start at Pin 3. Wind 7 turns of item [3] in 1 layer. Finish on Pin 1.

Outer Wrap

Wrap windings with 3 layers of tape item [4].

Final Assembly

Assemble and secure core halves. Varnish impregnate item [5].

Page 11 of 32

Power Integrations, Inc.

Tel: +1 408 414 9660 Fax: +1 408 414 9760

EPR-21 Datasheet(PDF) 11 Page - Power Integrations, Inc.