Switching power supply standby efficiency improvement principle

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Overview:
With the increasing importance of energy efficiency and environmental protection, people expect higher and higher standby power efficiency of switching power supply. Customers require power supply manufacturers to provide green energy standards such as BLUE ANGEL, ENERGY STAR, ENERGY 2000, etc. The requirements of the power supply are: By 2005, the rated power is 0.3W~15W, 15W~50W and 50W~75W. The standby power consumption should be less than 0.3W, 0.5W and 0.75W respectively. At present, when most of the switching power supplies are switched from the rated load to the light load and standby state, the power efficiency drops sharply, and the standby efficiency cannot meet the requirements. This presents new challenges for power supply design engineers.
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