POWER SUPPLY CIRCUIT, DRIVE LOAD, AND LED LIGHTING

摘要

PROBLEM TO BE SOLVED: To provide a power supply circuit which works as a direct current power supply with small pulsation without installing a smoothing electrolytic capacitor in an output terminal.SOLUTION: An AC input is bisected and rectified in a full wave rectifying circuit, respectively. A phase of one of the bisected AC input is shifted approximately 90 degrees from a phase of another. By adding a result of their full wave rectifications in a voltage adding circuit, a power supply circuit works as a direct current power supply with small pulsation, without using a smoothing capacitor.