A 0.69% LED Current Error LED Driver with Hysteretic Current Control.

This paper presents a wide-input-range LED driver that takes the BUCK-type topology as the basic structure, utilizing hysteretic current control to adjust the average LED current. A novel adaptive delay compensated hysteretic control is proposed to adaptively modulate both the peak and valley inductor currents, minimizing their current deviations, thereby enhancing the accuracy of the average LED current under different input and output voltages. The LED current error is minimized to within 0.69% of the high LED current of 3A under different input voltages.