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

Yi-Chieh Hsu, Jing-Yuan Lin and Charlie Chung-Ping Chen
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Yi-Chieh Hsu: Graduate Institute of Electronics Engineering, and Department of Electrical Engineering, National Taiwan University, Taipei 10607, Taiwan
Jing-Yuan Lin: Department of Electronic and Computer Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
Charlie Chung-Ping Chen: Graduate Institute of Electronics Engineering, and Department of Electrical Engineering, National Taiwan University, Taipei 10607, Taiwan

Energies, 2018, vol. 11, issue 6, 1-12

Abstract: 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 μm 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%.

Keywords: LED driver; DC–DC converter; area-saving; high efficiency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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