DN05043/D, Universal AC Input, 5 V or 12 V Output, 20 Watt Power Supply Design Note

DN05043/D, Design Note describes a simple 20 watt, universal AC input, constant voltage power supply intended for AC adapters, industrial equipment, or white goods where isolation from the AC mains is required, and low cost, high efficiency, and low standby power are essential. The featured power supply is a simple CCM flyback topology utilizing NCP1129 monolithic switcher with integral 2 ohm, vertical channel MOSFET in a DIP8 package