Research on load regulation of Buck constant current converter

Abstract

There is a problem of poor load regulation in traditional LED power supply. In this paper, a control strategy of inductor current compensation based on the output voltage feedback is used to compensate the output current deviation caused by the load adjustment with the load voltage signal. In this paper, the factors affecting the load regulation of Buck constant current topological are analyzed theoretically. Combined with analysis of engineering application data, the control strategy of load regulation is optimized. Finally, the control method is verified on a LED power supply of 200 watts. The load regulation rate was reduced from 0.03%/V to 0.01%/V, which verified the correctness of the control methodproposed and achieved the effect of optimizing the load regulation rate.

Keywords

• led power supply
• load regulation
• inductance peak current