This circuit is a switching power source , or SMPS , it is based on the MC33374 integrated circuit , which is a switching voltage regulator high power manufactured by Motorola Semiconductor . This switching power supply circuit using the MC33374 will provide a maximum power of around 90 W and requires few external components . Power Supply Switched 15V x 6A Circuit Diagram The MC33374 is an IC designed to operate directly from a rectified supply line , with a fixed input AC 100 V, 115 V or 230 V, and more than 90 W with a variable AC input varies from 85 V to 265 V. If you liked this ,Take a few Seconds to Share this and leave comments