Design and Implementation of the Linear LED Driver

被引：5
|
作者：
Chou, Hsiao-Hsing [1 ]
机构：
[1] Natl Taichung Univ Sci & Technol, Dept Comp Sci & Informat Engn, Taichung, Taiwan
来源：
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2023年 / 70卷 / 03期
关键词：
Light emitting diodes; Switches; Topology; Regulators; Voltage control; Heating systems; Control systems; Switch mode power supply (SMPS); AC-DC LED linear driver; constant LED current; constant LED power; primary side control flyback converter; LED strings forward voltage (VFS);
D O I：
10.1109/TCSII.2022.3219226
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This brief presents a new LED control scheme to maintain a constant LED power. In LED control schemes, the conventional approach is to maintain a constant LED current. However, this traditional approach will bring high power at high input voltage and then generate high heat. The higher heat will shorten the life time of the product and reduce the reliability. The proposed scheme can solve this problem. The LED driver with the proposed scheme has been successfully fabricated by Macronix and the feasibility of the method has been verified. From the experimental results, the higher the input voltage, the lower the LED current. This constant power method can effectively avoid overheating at high input voltage. The control scheme, the theoretical analysis and the circuit implementation are presented in this brief.
引用
收藏
页码：1059 / 1063
页数：5
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