A LED Driver With Switched Capacitor

作者：dos Santos Filho Esio Eloi^*; Miranda Pedro H A; Sa Edilson M Jr; Antunes Fernando L M

来源：IEEE Transactions on Industry Applications, 2014, 50(5): 3046-3054.

DOI：10.1109/TIA.2014.2308397

• DC/DC converter
• light emitting diodes (LEDs)
• switched capacitor

This paper proposes a switched capacitor-based converter to drive high-power light-emitting diodes (LEDs). In contrast to conventional constant current dc drivers, the current pulse is provided by a switched capacitor. The proposed approach differs from the traditional switched-capacitor-based one, because it uses a small inductor to improve the switching behavior of the converter. Based on the charge control analysis, the effects of switching devices on the proposed converter are evidenced and evaluated. A 6 W, 24 V laboratory prototype has been implemented, while experimental results are presented and discussed to demonstrate the technical feasibility of the proposed converter applied as LED driver.

• 出版日期2014-10