An LED driver with optimized output voltage control technique

Abstract

This paper presents the LED driver with optimized output voltage control technique. The characteristics of LEDs may be affected by usage time, environmental factors, and process variations. Thus, the driving voltage for each LED is not the same, which results in poor efficiency of the LED driver. The proposed LED driver with optimized output voltage control technique can achieve the design target. This work is implemented using TSMC 0.35µm CMOS process with a chip area of about 0.28mm². The maximum driving current of 200mA, and the operating frequency of 100 kHz. The simulation results demonstrate that the output voltage of the LED driver is optimized, which improves the efficiency of the system by about 7%.