Design Example Report
Title
Specification
Application
Author
Document
Number
Date
Revision
3W Non-Isolated Buck-Boost Converter
using LNK305P
Input: 108–265 VAC
Output: -12 V / 250 mA
Home Appliance
Power Integrations Applications Department
DER-49
April 20, 2005
1.0
Summary and Features
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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: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
POWERINT [ POWER INTEGRATIONS, INC. ]
