Abstract
A conventional single stage ac-dc LED driver usually produces significant twice-line-frequency ripple current when a high power factor is achieved. The ripple current causes a lighting flicker of the LEDs. In this paper, an energy channeling ripple cancellation LED driver is proposed. It achieves true single stage power conversion, maintains a high power factor while significantly removing the twice-line-frequency ripple current-flicker free LED driving. An 8.5 W, 50 V/0.17 A Buck-Boost experimental prototype has been built to verify the proposed method.
| Original language | English (US) |
|---|---|
| Article number | 7502125 |
| Pages (from-to) | 3892-3907 |
| Number of pages | 16 |
| Journal | IEEE Transactions on Power Electronics |
| Volume | 32 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2017 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2016 IEEE.
Keywords
- Energy channeling
- offline LED driver
- power factor correction
- single-stage power conversion