LEDs are highly energy efficient and have substantially longer lifetimes compared to other\nexisting lighting technologies. In order to facilitate the new generation of LED devices, approaches to\nimprove power efficiency with increased integration level for lighting device should be analysed.\nThis paper proposes a fully on-chip integrated LED driver design implemented using heterogeneous\nintegration of gallium nitride (GaN) devices atop BCD circuits. The performance of the proposed\ndesign is then compared with the conventional fully on-board integration of power devices with the\nLED driver integrated circuit (IC). The experimental results confirm that the fully on-chip integrated\nLED driver achieves a consistently higher power efficiency value compared with the fully on-board\ndesign within the input voltage range of 4.5â??5.5 V. The maximal percentage improvement in the\nefficiency of the on-chip solution compared with the on-board solution is 18%.
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