DER-108

Network Interface

October 26, 2005

Page 8 of 19

Power Integrations

Tel: +1 408 414 9200 Fax: +1 408 414 9201

www.powerint.com

6

Transformer Specification

Note: Winding the bias winding after the secondary winding (using triple insulated wire)

will result in better load regulation.

6.1

Electrical Diagram

Figure 4 – Transformer Electrical Diagram

6.2

Electrical Specifications

Electrical Strength

3000 VAC

Primary Inductance

Pins 1-2, all other windings open, measured at

100 kHz, 0.4 VRMS

855

µH, -0/+20%

Resonant Frequency

Pins 1-2, all other windings open

800 kHz (Min.)

Primary Leakage Inductance

Pins 1-2, with Pins 5-8 shorted, measured at

100 kHz, 0.4 VRMS

35

µH (Max.)

6.3

Materials

Item

Description

[1]

Core: EE16 ALG=140nH/T

2

[2]

Bobbin: 8-pin bobbin

[3]

Magnet Wire: #34 Heavy Nyleze

[4]

Magnet Wire: #32 Heavy Nyleze

[5]

Triple Insulated Wire: #30 TEX-E

[6]

Tape, 3M

[7]

Varnish