There was a customer who required the input power of the lamp to be a fixed value with a fixed error of 5%, and the output current could only be adjusted for each lamp to reach the specified power. Due to different working environment temperatures and different lighting times, the power of each lamp will still vary greatly.

The customer puts forward such a request, although it has its marketing and commercial considerations. However, the volt-ampere characteristics of the LED determine that the 24v led driver is a constant current source, and its output voltage changes with the change of the LED load series voltage Vo. When the efficiency of the 24v led driver is basically unchanged, its input power changes with Vo.

At the same time, the overall efficiency of the led driver for strip light will increase after thermal equilibrium. Under the same output power condition, the input power will decrease compared to the moment of startup.

Therefore, when formulating requirements, the application of hould first understand the working characteristics of the LED, avoid putting forward some indicled driver for strip light sators that do not conform to the principle of working characteristics, and avoid indicators that far exceed actual requirements, and avoid excess quality and cost waste.