Design Example Report
Title
Specification
Application
Author
Document
Number
Date
Revision
4.8W Charger using LNK520P
Input: 85 – 265 VAC 50/60Hz
Output: 12V / 400mA
UPS Battery Charger
Power Integrations Applications Department
DER-56
April 20, 2005
1.0
Summary and Features
•
•
•
•
•
Low component count battery charger to replace linear transformer and
regulator
Highly efficient operation
Current limited output
Optimized switching characteristics minimizes EMI
- Achieves greater than 8dBµV margin to composite conducted limits
- No Y1 safety capacitor required for EMI compliance
Small low cost EE16 transformer
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: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
POWERINT [ POWER INTEGRATIONS, INC. ]
