POWER SUPPLY SYNCHRONIZED WITH INPUT POWER SWITCHING

摘要

A power supply unit can guarantee the zero current switching and regulation of the output power by controlling the switching of the output power. The commercial AC power is switched as the power supply unit(110) and it converts into the DC power source. The DC power source is switched and the set up in advance to output the output power. The synchronization portion(120) provides the synchronizing signal synchronized in the AC power switching. The switching controller(130) controls the switching of the DC power source according to the synchronizing signal from the synchronization portion. The switching controller comprises comparator and controller. The comparator(131) compares the voltage level of the set up in advance reference voltage with the voltage level of the output power.