DER-39 Datasheet, PDF (1/23 Pages) Power Integrations, Inc. – 2.5W Adapter using LNK520P

Design Example Report
Title
2.5W Adapter using LNK520P
Specification
Input: 90-265Vac
Output: 5.5V / 450mA
Application Cell Phone Charger
Author
Power Integrations Applications Department
Document
Number
DER-39
Date
May 13, 2004
Revision
1.0
Summary and Features
• No optocoupler
• Provides sloping output VI characteristic, making it an ideal low standby power
replacement for a linear transformer
• Uses an EF12.6 transformer
• No Y1 safety capacitor required, giving very low earth leakage current
• Meets CISPR-22B with large margin
• Low component count
• Less than 300mW standby consumption at 230 VAC
• High efficiency
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