Design of fast stabilized LED driver IC with low overcurrent

Light-emitting diodes (LEDs) are an efficient source of illumination for displays and backlights, providing extended lifespan, wide color gamut, and excellent dimming capability. The use of pulse-width modulation (PWM) for dimming makes LEDs susceptible to overcurrent, which can shorten the lifespan of the devices. This paper proposes a novel technique to suppress overcurrent in LEDs operating in PWM dimming mode. The proposed LED driver IC was designed in accordance with the TSMC 0.25-μm 60-V BCD fabrication process, and experimental as well as simulation results demonstrate the efficacy of the proposed approach.