PC board thermal management of high power LEDs

被引：0
|
作者：
Yu, J. H. [1 ]
Oepts, Wouter [1 ]
Konijn, Huub [1 ]
机构：
[1] Philips Lumileds Lighting Company, Eindhoven, Netherlands
来源：
TWENTY FOURTH ANNUAL IEEE SEMICONDUCTOR THERMAL MEASUREMENT AND MANAGEMENT SYMPOSIUM, PROCEEDINGS 2008 | 2008年
关键词：
power LEDs; PC board thermal management; FR4 filled and capped vias; closely or densely packed LEDs; board thermal resistance; solder joint reliability; PC board reliability;
D O I：
暂无
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Increasing requirements of closely packed high power LEDs pose challenges for PC board thermal management. This paper presents a cost-effective thermal solution using FR4 based PCB technology and filled and capped vias. This robust technology enables superior thermal performance on board level for closely packed power LEDs. No solder joint or board level reliability failures were found during a temperature cycling test (TCT) from -40 degrees C to 125 degrees C after 1000 cycles. Moreover no solder joint and board level failure was found after 4000 cycles for open via FR4 when monitoring changes of board thermal resistance. Trade-offs are given for board thermal resistance versus packing density, various board designs, PCB technology, solder joint reliability and PCB board level reliability including open vias and filled and capped vias.
引用
收藏
页码：64 / 68
页数：5
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