Area-saving and high-efficiency rgb led driver with adaptive driving voltage and energy-saving technique
Journal
Energies
Journal Volume
11
Journal Issue
6
Date Issued
2018
Author(s)
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 mm2. 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%. © 2018 by the authors.
Subjects
Area-saving; DC–DC converter; High efficiency; LED driver
SDGs
Other Subjects
CMOS integrated circuits; Electric current regulators; Energy conservation; Light emitting diodes; Metals; MOS devices; Oxide semiconductors; Area savings; Complementary metal-oxide-semiconductor technologies; DC converter; Energy-saving techniques; High-efficiency; LED drivers; Linear current regulator; Operating frequency; DC-DC converters
Type
journal article