DER-97 Datasheet, PDF (1/31 Pages) Power Integrations, Inc. – 21.7 W Power Supply using TOP246P

Design Example Report
Title
21.7 W Power Supply using TOP246P
Specification
Input: 85 - 265 VAC
Output: 48 V / 450 mA
Application PoE AC Adapter
Author
Power Integrations Applications Department
Document
Number
DER-97
Date
September 12, 2005
Revision
1.0
Summary and Features
• Single Sided PC board
• Reduced cost and component count
• Eliminates two y-capacitors to ground
• Eliminates secondary side common mode choke
• Eliminates ground wire differential choke
• High Efficiency (~ 80 %)
• Lower Cost Transformer Construction – no sleeving termination required
• Low EMI signature (both radiated and conducted emissions)
• Built-in output short circuit protection
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