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SOLDERING & HANDLING
XLamp
ML Family LEDs
®
INTRODUCTION
This application note applies to XLamp
have order codes in the following fomat:
MLxxxx-xx-xxxx-xxxxxx
This application note explains how XLamp ML family LEDs and
assemblies containing these LEDs should be handled during
manufacturing. Please read the entire document to understand
how to properly handle XLamp ML family LEDs.
Cree LED / 4400 Silicon Drive / Durham, NC 27703 USA / +1.919.313.5330 /
© 2010-2021 Cree LED. The information in this document is subject to change without notice. Cree
the Cree LED logo is a trademark, of Wolfspeed Inc. XLamp
are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. This document
is provided for informational purposes only and is not a warranty or a specification. For product specifications, please see the data sheets available
at www.cree-led.com.
ML family LEDs, which
®
and the Cree logo are registered trademarks, and
®
is a registered trademark of Cree LED. Other trademarks, product and company names
®
TABLE OF CONTENTS
ML Family LEDs ..................................................2
®
Circuit Board Preparation & Layouts ................................................3
) Measurement Point ....................................4
s
ML family LEDs..................................4
®
Low Temperature Operation .............................................................7
ML Family LED Reflow Soldering Characteristics ............8
®
Chemicals & Conformal Coatings ....................................................9
Assembly Storage & Handling ....................................................... 10
Tape and Reel ................................................................................. 11
Packaging & Labels ....................................................................... 12
www.cree-led.com
CLD-AP50
REV 10
1
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Related Manuals for Cree XLamp ML Family LEDs
Summary of Contents for Cree XLamp ML Family LEDs
-
Page 1: Table Of Contents
Cree LED / 4400 Silicon Drive / Durham, NC 27703 USA / +1.919.313.5330 / www.cree-led.com © 2010-2021 Cree LED. The information in this document is subject to change without notice. Cree and the Cree logo are registered trademarks, and CLD-AP50 ®... -
Page 2: Handling Xlamp ® Ml Family Leds
ML FAMILY LEDS ® Manual Handling Use tweezers to grasp XLamp ML family LEDs at the base. Do not touch the top surface of the LED with tweezers. CORRECT WRONG Cree LED recommends the following at all times when handling XLamp ML Family LEDs or assemblies containing these LEDs: •... -
Page 3: Circuit Board Preparation & Layouts
Printed circuit boards (PCBs) should be prepared and/or cleaned according to the manufacturer’s specifications before placing or soldering XLamp ML family LEDs onto the PCB. The diagram below shows the recommended PCB solder pad layout for XLamp ML family LEDs. -
Page 4: Case Temperature
It is not required to use a solder footprint for the thermal pad that is larger than the XLamp ML LED itself. In testing, Cree LED has found such a solder pad to have insignificant impact on the resulting T measurement. - Page 5 ML FAMILY LED SOLDERING & HANDLING ® Solder Paste Type Cree LED strongly recommends using “no clean” solder paste with XLamp ML LEDs so that cleaning the PCB after soldering is not required. Cree LED uses Kester R276 solder paste internally.
- Page 6 10%. exceeded 30%. Baking Conditions It is not necessary to bake all XLamp ML Family LEDs. Only the LEDs that meet all of the following criteria must be baked: • LEDs that have been removed from the original MBB packaging.
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Page 7: Low Temperature Operation
® LOW TEMPERATURE OPERATION The minimum operating temperature of these XLamp LED components is -40 °C. To maximize lifetime, Cree LED recommends avoiding applications where the lamps are cycled on and off more than 10,000 cycles at temperatures below 0 °C. © 2010-2021 Cree LED. The information in this document is subject to change without notice. Cree... -
Page 8: Xlamp ® Ml Family Led Reflow Soldering Characteristics
® In testing, Cree LED has found XLamp ML family LEDs to be compatible with JEDEC J-STD-020C, using the parameters listed below. As a general guideline, Cree LED recommends that users follow the recommended soldering profile provided by the manufacturer of the solder paste used, and therefore it is the lamp or luminaire manufacturer’s responsibility to determine applicable soldering requirements. -
Page 9: Chemicals & Conformal Coatings
Note, Cree LED has found certain chemicals to be harmful to XLamp ML Family LEDs. Cree LED recommends not using these chemicals anywhere in an LED system containing XLamp ML Family LEDs. The fumes from even small amounts of the chemicals may damage the LEDs. -
Page 10: Assembly Storage & Handling
Do not stack PCBs or assemblies containing XLamp ML family LEDs. PCBs or assemblies containing XLamp ML family LEDs should be stacked in a way to allow at least 1-cm clearance. Do not use bubble wrap directly on top of XLamp ML family LEDs. Force from the bubble wrap can potentially damage the LED. CORRECT... -
Page 11: Tape And Reel
4.000 Pocket Tape 13mm 7" © 2010-2021 Cree LED. The information in this document is subject to change without notice. Cree and the Cree logo are registered trademarks, and CLD-AP50 ® the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp is a registered trademark of Cree LED. -
Page 12: Packaging & Labels
PACKAGING & LABELS The diagrams below show the packaging and labels Cree LED uses to ship XLamp ML family LEDs. XLamp ML family LEDs are shipped in tape loaded on a reel. Each box contains only one reel in a moisture barrier bag.
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