LX157xCM/xCDM/xIM/xIDM/xMY series power controller is a secondary-side regulator for isolated auxiliary or secondary power supplies. The series has the advantages of low cost, low saturation voltage of switching devices, low peak current stress on the primary switch, high operating frequency, small output inductor, etc. The series is widely used in multiple output non-isolated switching power supplies, such as desktop computers, as well as telecommunications applications.