Area-Saving and High-Efficiency RGB LED Driver with Adaptive Driving Voltage and Energy-Saving Technique

作者：Hsu Yi Chieh; Lin Jing Yuan^*; Chen Charlie Chung Ping

来源：Energies, 2018, 11(6): 1422.

DOI：10.3390/en11061422

• LED driver
• DC-DC converter
• area-saving
• high efficiency

The red-green-blue light-emitting diode (RGBLED) driver with adaptive driving voltage and energy-saving (ADVE) technique is presented in this paper. To obtain the proper driving voltage, a dynamic output voltage selector is proposed. This approach tracks the reference voltage of a boost converter to achieve the appropriate output voltage of the boost converter. Hence, the power loss of the linear current regulator is reduced to improve the efficiency of whole system. Moreover, the chip area is saved by the proposed switching linear current regulator. This chip was fabricated using TSMC 0.35 m 2P4M complementary metal-oxide-semiconductor (CMOS) technology. The active chip area is 0.3 mm(2). The maximum driving current and operating frequency are 100 mA and 100 kHz, respectively. Compared with a conventional LED driver with fixed output voltage, the experimental results demonstrate that the power loss of the proposed LED driver with ADVE technique is reduced by over 58%.

• 出版日期2018-6
• 单位中国科学院电工研究所