The adapter provides the LED table lamp with stable AC power - > AC-DC buck conversion. Its real-time on-load output capacity will affect the performance of the LED table lamp in this scheme. It is used for the adapter of the 3x1w white LED table lamp in this scheme. When it is on load, its output current should be greater than 1a, and the voltage should be stable at DC12V. When some adapters with poor load capacity are connected to the LED light source load of this scheme, the actual output voltage will drop to 7V, or even 6.5V. For the LED driving IC whose working voltage starts from 8V, it will enter the undervoltage protection state and stop working. Once the driving IC stops working, the voltage will rise to 12V again, and the LED driving IC will enter the working state again, so that the LED table lamp will start again There is a flash visible to the human eye. At this time, only the adapter with good load capacity can make the LED table lamp work normally. At the same time, LED driving IC with working voltage range of 6V should be selected, which can also reduce the selection requirements of adapter and reduce the production cost.