1.Design DC power adapter,18W,24W etc. 2.Precise design performance, OVP,OCP, ... ,CE,BS,GS,KC,PSE,SAA etc.4.Provide constant current power supply for digital electronics products.5.Used quality safted components and ... requirements.9.Overall quality reliability test such as loading output,no-loading output,full load efficiency,noise data,short circuit protection,OCP ...