RDK-242

Title Reference Design Report for a 30 W Supply Using TOPSwitch®-JX TOP266VG Specification 85 VAC – 264 VAC Input; 12 V, 2.5 A Output Application General Purpose Author Applications Engineering Department Document Number RDR-242 Date March 1, 2010 Revision 1.2 Summary and Features    Highly energy efficient  Very low no-load input power: < 80 mW at 230 VAC  Full load efficiency >84% at 115 VAC / 47 Hz  Efficiency >80% above 8% load  Average efficiency >84% (25%, 50%, 75%, 100% load points)  Simplifies meeting ENERGY STAR 2.0, 80 Plus and EuP requirements  725 V MOSFET rating allowed high turns ratio (VOR) and use of 60 V Schottky output diode Low cost, low component count and small PCB footprint solution  132 kHz operation optimizes core size and efficiency performance  Low-profile eDIP™ package with no external heatsink Integrated Protection and Reliability Features  Line undervoltage lock out (UVLO) and line overvoltage shutdown prevents output glitching and improves reliability  Primary sensed output overvoltage shutdown (OVP) eliminates second optocoupler  Auto recovery output over current (OCP) and short circuit protection  Flat overload power with line voltage  Meets limited power source (LPS)