DER-49 Datasheet, PDF (1/17 Pages) Power Integrations, Inc. – 3W Non-Isolated Buck-Boost Converter using LNK305P

Design Example Report
Title
3W Non-Isolated Buck-Boost Converter
using LNK305P
Specification
Input: 108–265 VAC
Output: -12 V / 250 mA
Application Home Appliance
Author
Power Integrations Applications Department
Document
Number
DER-49
Date
April 20, 2005
Revision
1.0
Summary and Features
• Non-Isolated Topology - no direct path from input to output
• Low cost off the shelf inductor – no custom transformer required
• 15 components including EMI filter
• Loop Fault Protection
• Short Circuit Protection
• Hysteretic Thermal Shutdown
• Output Referenced to Neutral
• Precise Output Voltage control
• Frequency Jitter
• Excellent Conducted EMI (>10dB margin across spectrum)
• Extremely low standby power consumption (<200mW!)
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