The Design of High Power LED Headlamp

Abstract:

With the continuous development of LED(Light-Emitting Diode) manufacturing technology, the high power white LED is gradually applied in the field of all kinds of lighting .But with working time increasing of LED chips, their junctions temperature continue increasing, which lead to decrease light-emitting efficiency and reliability of LED chip, and even be failure. According to the serious heating of LED chip, this paper has been designed a fin-type aluminum radiator panels using Pro/E software. A LED constant current drive circuit is designed by using LTC3783 chip. With the ANSYS software, thermal analysis was carried out on the fin-type aluminum radiator panels, and eventually the mode of high power LED headlamps is determined. The stability of the LED constant current drive circuit is verified through experiments. The LED headlamps of 90W worked for ten hours, and the results of the experiments showed that the LED chip junctions temperature measured are less than 75°Cso we can solve heat dissipation of high power LED headlamps effectively.

• Periodical: Applied Mechanics and Materials (Volumes 423-426)
• Pages: 2098-2103
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.423-426.2098
• Online since: September 2013
• Authors: Wen Lin Chen, Zhen An, Chao Qun Xiang, Chen Yang Liu, Li Na Hao*
• Keywords: ANSYS, Heat Dissipation, LED, LTC3783 Constant Current Drive Circuit

References

[1] Yi Wang，XiangzhuXu，Zhaohong Li，Xin Ming，Zekun Zhou，Bo Zhang，A constant current control circuit design for LED driver，microsystemelectronics，2012（4）：42-2.

[2] Hui Zhang，YuzhouLv，Peipei Cui，Qianglin Zhang，Based on the Boost of the high-power LED constant current drive circuit，Modern Scientific Instruments，2013（2）：97-99.

[3] ZengminRen，Huibin Qin，Jiadong Cui，Design and implementation of a high power LED driver circuit，Journal of Hangzhou Dianzi University，2007（10）：27-5.

[4] Brooks, Timothy W. (US), TEMPERATURE COMPENSATED LED CONSTANT CURRENT SOURCE, US Patents ，US20120068627 ，03/22/(2012).

[5] Petrosk J. Thermal challenges facing new generation light emitting diodes. Proceedings of SPIE, 2002, 4776: 215-222.

[6] Aqkahn T, Garimella S V, Petroski J, et al. Optimal design of miniature piezoelectric fans for cooling light emitting diodes. in: Proceedings of the Ninth Intersociety Conference on Thermal and Thermo mechanical Phenomena in Electronic Systems, San Diego, USA, 2004. 663-671.

DOI: 10.1109/itherm.2004.1319239

[7] Bing Jun. High brightness LED lighting and solar lighting application technology development. technical report.

[8] Wei Guo, JibingChen, Bin An. LED light source junction temperature measurement[J]. Electronics Process Technology, 2012, (6).

[9] Information on http: /wenku. baidu. com/view/9e938bec0975f46527d3e102. html.