器件名称: DER-58
功能描述: 3W Wide Range Flyback Power Supply using LNK304P
文件大小: 883.14KB 共22页
简 介:Design Example Report
Title Specification Application Author Document Number Date Revision 3W Wide Range Flyback Power Supply using LNK304P Input: 57-580VAC Output: 12V / 250mA Utility Meter Power Integrations Applications Department DER-58 May 4, 2005 1.0
Summary and Features StackFETTM 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-SHIELDTM 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 shortcircuit 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: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com
DER-58
Wide-range Flyback using LNK304
May 4, 2005
Table Of Contents
1. Introduction ....................……