The switching mode is characterized by high conversion efficiency, but it also has the problem of noise, so which conversion mode to choose depends on which application. Generally, the efficiency of the charge pump driving mode will change with the change of the input voltage.
For the structure of the power supply installed in the lamp, it is particularly important. Because the luminous efficiency of LED decreases with the increase of LED temperature, the heat dissipation of LED is very important. The efficiency of the power supply is high, its loss of power is small, and the heat is small in the lamp, which reduces the temperature rise of the lamp. It is beneficial to delay the light decay of LED.
