www.powerint.com

B

12/02

DI-16

Slot 1 – Start Pin 5

26T

0.25 mm

Finish Pin 3

Slot 2 – Start Pin 11

1T

0.25 mm

Finish Pin 14

Start Pin 14

2T

0.25 mm

Finish Pin 12

Start Pin 16

4T

0.25 mm

Finish Pin 10

Start Pin 17

3T

0.25 mm

Finish Pin 16

Start Pin 18

6T

0.25 mm

Finish Pin 17

Slot 3 – Start Pin 3

26T

0.25 mm

Finish Pin 1

Start Pin 8

7T

0.25 mm

Finish Pin 9

Slot 4 – Start Pin 11

1T

0.25 mm

Finish Pin 14

Start Pin 14

2T

0.25 mm

Finish Pin 12

Start Pin 14

2T

0.25 mm

Finish Pin 12

Slot 5 – Start Pin 5

26T

0.25 mm

Finish Pin 4

Slot 6 – Start Pin 11

1T

0.25mm

Finish Pin 15

Start Pin 15

2T

0.25mm

Finish Pin 13

Start Pin 15

2T

0.25 mm

Finish Pin 13

Start Pin 16

4T

0.25 mm

Finish Pin 10

Slot 7 – Start Pin 4

26T

0.25 mm

Finish Pin 1

Slot 8 – Start Pin 11

1T

0.25 mm

Finish Pin 15

Start Pin 15

2T

0.25 mm

Finish Pin 13

Start Pin 16

4T

0.25 mm

Finish Pin 10

Start Pin 17

3T

0.25 mm

Finish Pin 16

Start Pin 18

6T

0.25 mm

Finish Pin 17

Slot 9 – Start Pin 5

26T

0.25 mm

Finish Pin 4

For the latest updates, visit our Web site: www.powerint.com

Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability.

Power Integrations does not assume any liability arising from the use of any device or circuit described herein, nor does it convey any

license under its patent rights or the rights of others. The products and applications illustrated herein (including circuits external to the

products and transformer construction) may be covered by one or more U.S. and foreign patents or potentially by pending U.S. and foreign

patent applications assigned to Power Integrations. A complete list of Power Integrations’ patents may be found at www.powerint.com.

The PI Logo, TOPSwitch, TinySwitch, LinkSwitch and EcoSmart are registered trademarks of Power Integrations, Inc.

PI Expert is a trademark of Power Integrations, Inc. ©Copyright 2002, Power Integrations, Inc.

WORLD HEADQUARTERS

AMERICAS

Power Integrations, Inc.

San Jose, CA 95138 USA

Customer Service:

Phone:

+1 408-414-9665

Fax:

+1 408-414-9765

e-mail: usasales@powerint.com

CHINA

Power Integrations International

Holdings, Inc.

China

Phone:

+86-755-8367-5143

Fax:

+86-755-8377-9610

e-mail: chinasales@powerint.com

SINGAPORE

Power Integrations, Singapore

Republic of Singapore 308900

Phone:

+65-6358-2160

Fax:

+65-6358-2015

e-mail: singaporesales@powerint.com

JAPAN

Power Integrations, K.K.

Keihin-Tatemono 1st Bldg.

Japan

Phone:

+81-45-471-1021

Fax:

+81-45-471-3717

e-mail: japansales@powerint.com

EUROPE & AFRICA

Power Integrations (Europe) Ltd.

United Kingdom

Phone:

+44-1344-462-300

Fax:

+44-1344-311-732

e-mail: eurosales@powerint.com

KOREA

Power Integrations

International Holdings, Inc.

Seoul, Korea

Phone:

+82-2-782-2840

Fax:

+82-2-782-4427

e-mail: koreasales@powerint.com

TAIWAN

Power Integrations

International Holdings, Inc.

Taipei, Taiwan

Phone:

+886-2-2727-1221

Fax:

+886-2-2727-1223

e-mail: taiwansales@powerint.com

INDIA (Technical Support)

Innovatech

Bangalore, India

Phone:

+91-80-226-6023

Fax:

+91-80-228-9727

e-mail: indiasales@powerint.com

APPLICATIONS HOTLINE

APPLICATIONS FAX

World Wide +1-408-414-9660

World Wide +1-408-414-9760

•A soft-finish capacitor (C20), eliminates start-up output

overshoot.

• Second stage LC post-filtering was used on all outputs for

low output ripple (L2-6 and C8, 10, 12, 15 and 18).

• Primary clamp components VR1 and D5 limit the leakage

inductance induced peak drain voltage to a safe value. R2

and C5 reduce power dissipation in VR1.

• Frequency jitter provides large EMI margins with simple

filtering.

Core & Bobbin

Primary Inductance

(pins 1-5, with pins 3-4

shorted together, all other

windings open)

Primary Resonant

Frequency (same test

conditions as above)

Leakage Inductance

(pins 1-5 with pins 3-4

shorted, pins 10-18 shorted)

TRANSFORMER PARAMETERS

Table 2. Transformer Electrical Specifications.

Orega SMT 18 core/bobbin set,

487 µH ±10%

2 MHz (minimum)

15 µH (maximum)

-20

-10

0

-10

20

30

40

50

60

70

80

0.15

1

10

30

Frequency (MHz)

EN_V_QP

EN_V_AV

QP Limit Line

Quasi-Peak Scan

Average Scan

AV Limit Line

Figure 2. Conducted EMI (230 VAC, 43 W).

WINDING INSTRUCTIONS

Table 1. Transformer Build Information.