PC Board Thermal Management of High Power LEDs

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 c...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Yu, J.H., Oepts, W., Konijn, H.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung: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 -40degC to 125degC 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.
ISSN:1065-2221
2577-1000
DOI:10.1109/STHERM.2008.4509368