40W SWITCHING MODE POWER SUPPLY EVALUATION BOARD DESIGNED IN A QUASI RESONANT FLYBACK CONVERTER TOPOLOGY USING ICE2QR0680Z QUASI-RESONANT COOLSET™. WITH THE COOLMOS™ INTEGRATED IN THIS IC, IT GREATLY SIMPLIFIES THE DESIGN AND LAYOUT OF THE PCB. DUE TO VALLEY SWITCHING, THE TURN ON VOLTAGE IS REDUCED AND THIS OFFERS HIGHER CONVERSION EFFICIENCY COMPARING TO HARD-SWITCHING FLYBACK CONVERTER.