DER-58 Datasheet, PDF (1/22 Pages) Power Integrations, Inc. – 3W Wide Range Flyback Power Supply using LNK304P

Design Example Report
Title
3W Wide Range Flyback Power Supply
using LNK304P
Specification
Input: 57-580VAC
Output: 12V / 250mA
Application Utility Meter
Author
Power Integrations Applications Department
Document
Number
DER-58
Date
May 4, 2005
Revision
1.0
Summary and Features
• StackFET^TM Flyback Topology delivers full load over extremely wide input AC voltage
range
• LinkSwitch-TN feedback simplifies non-isolated voltage regulation – 2 resistors
precisely set the output voltage
• E-SHIELD^TM Transformer Construction for reduced common-mode EMI (>10dB
margin)
• 66kHz Switching Frequency with jitter to reduce conducted EMI
• Simple ON/OFF controller – no feedback compensation required
• Auto-restart function for automatic and self-resetting open-loop, overload and short-
circuit protection
• Built-in Hysteretic thermal shutdown at 135C
• EcoSmart for extremely low standby power consumption <200mW at 265VAC
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