EPR-21 datasheet(10/32 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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10 / 32 page

EPR-21 – 5 V, 30 W DC-DC Converter

19-Nov-02

7 Transformer Specification

WDG #2

4 T

4 X #27 AWG

WDG #1

8 T

#27 AWG

WDG #3

7 T

#27 AWG

7, 8

5, 6

Figure 4 – EP-21 Transformer.

7.1 Electrical Specifications

Electrical Strength

1 s, from Pins 1-4 to Pins 5-8

1500 VDC

Creepage

Between Pins 1-4 and Pins 5-8

N/A

Primary Inductance

Pins 1-4, all other windings open,

measured at 100 kHz, 400 mVRMS

450

µH,

±25%

Resonant Frequency

Pins 1-4, all other windings open

3.8 MHz (min.)

Primary Leakage

Inductance

Pins 1-4, with Pins 5-8 shorted,

measured at 100 kHz, 400 mVRMS

µH

(max.)

7.2 Materials

Item

Description

[1]

Core: PR 14 X 8 Ungapped N87 Material Epcos P/N B65755-J-R87

[2]

Bobbin: 8 pin P1408 surface mount B&B B-096 or equivalent

[3]

Magnet Wire: #27 AWG Double Coated

[4]

Tape, Polyester, 3M #1298 or equiv. 4.5 mm wide

[5]

Varnish

Page 10 of 32

Power Integrations, Inc.

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