Power Integrations

5245 Hellyer Avenue, San Jose, CA 95138 USA.

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

www.powerint.com

Design Example Report

Title

13.1 W AC-DC Flyback Converter Using

TNY268P

Specification

Input: 90 – 264 VAC

Output: 5.25 V / 2.5 A

Application

Adapter

Author

Power Integrations Applications Department

Document

Number

DER-121

Date

November 3, 2005

Revision

1.0

Summary and Features

• Universal Input 90 VAC to 264 VAC

• Low Cost, Low Parts Count

• Minimum No Load Power Consumption <0.3 W at 264 VAC

• Meets CISPR22B EMI with Margin

• Efficiency >70% minimum.

• Meet CEC efficiency requirement with 5.25V2.5A.

• Meets +/-6KV-200A Lightning Surge.

• Cost reduced circuit does not require TVS

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.