EPR-48 Datasheet, PDF (1/20 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP48 - 1.4 W Non-Isolated Buck Converter Using LNK304P

Title
Engineering Prototype Report for EP48 –
1.4 W Non-Isolated Buck Converter Using
LNK304P (LinkSwitch^®-TN)
Specification 85–265 VAC Input, 12 V, 120 mA, 1.44 W Output
Room Air Conditioners, White Goods, LED
Applications Lighting, and Other Applications Requiring a Non-
Isolated Supply
Author
Power Integrations Applications Department
Document
Number
EPR-48
Date
02-May-2005
Revision
1.1
Summary and Features
• Low cost, low component count solution (only 16 components)
• No optocoupler required
• Much higher output current than “reactive dropper” type power supplies
• High efficiency (>69% over full input voltage range)
• Less than 1 W input power with 0.5 W load
• Low no-load consumption (<0.2 W at 265 VAC)
• Fully protected against open-loop faults, output overload, short circuit and
thermal overload
• Low-cost input stage meets EMI and surge requirements
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