http://iet.metastore.ingenta.com
1887

Light emitting diodes

More general concepts than this:

1-2 of 2 results

Filter by subject:

< Any subject

  • Electrical and electronic engineering [2]
  • Optical materials and applications, electro-optics and optoelectronics [2]
  • Optoelectronic materials and devices [2]
  • Electroluminescent devices [2]
  • Light emitting diodes [2]
  • Power systems and applications [2]
  • Power apparatus and electric machines [2]
  • Power convertors and power supplies to apparatus [2]
  • Computer and control engineering [2]
  • Control technology [2]
  • See more See less

Filter by content type:

Filter by author:

< Any author

Resonant two-string LED driver with power factor correction and passive current sharing
Author(s): Xueshan Liu, Duo Xu, Qi Yang, Jianping Xu
Source:
Type: Article
+ Show details - Hide details

A resonant two-string LED driver with power factor correction and passive current sharing is proposed. By controlling one output current, the other output current of the two-string LED driver can be controlled via passive current sharing, which makes its control simple. The proposed converter uses only one active switch and one magnetic component with single-stage power conversion, thus it benefits from low cost, small volume, light weight and high efficiency. The proposed converter is studied and experimental results of a 75 W two-string LED driver are provided to verify the studied results.

Add to favourites
Export citations
Single-switch multi-output converters as second stage of LED driver
Author(s): Xuewen Li, Xueshan Liu, Rui Xiao, Qun Zhou, Zhefeng Zhang
Source:
Type: Article
+ Show details - Hide details

Single-switch multi-output light emitting diode (LED) drivers derived from Cuk, Sepic and Zeta converter are proposed and analysed. The proposed multi-output LED drivers can achieve balanced output current of each LED string by charge balance of storage capacitor without auxiliary current balancing circuit. Therefore, if only the output current of one LED string is controlled to the required level, the output currents of other LED strings will be regulated to the same level naturally, which will greatly simplify the control loop, especially when the number of LED string is numerous. The proposed LED drivers use only one active switch, which decreases the volume of circuit and simplifies the control loop. Finally, a 76 W prototype is built to verify the studied results.

Add to favourites
Export citations
Items per page 20 | 50 | 100
Print this page
This is a required field
Please enter a valid email address