DER-42 Datasheet, PDF (1/19 Pages) Power Integrations, Inc. – 2.25W Power Supply using LNK520P

Design Example Report
Title
Specification
Application
2.25W Power Supply using LNK520P
Input: 90 – 265 Vac
Output: 4.5V / 0.5A
Portable CD player with AM/FM Radio
Author
Power Integrations Applications Department
Document
Number
DER-42
Date
November 18, 2004
Revision
1.0
Summary and Features
• Very low No Load Input Power - less than 80 mW @ 100 Vac.
• Low RFI allows good AM radio reception with very little interference
• Meets EMI, EN55022 B with no Y1 capacitor.
• Good voltage regulation with no optocoupler
• Lightweight solution for portable applications
• Ideal replacement for linear adapters
• Average efficiency @ 120 VAC greater than 70%
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.
Power Integrations
5245 Hellyer Avenue, San Jose, CA 95138 USA.
Tel: [phone] Fax: [phone]
www.powerint.com