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HLMP-S501 Datasheet(PDF) 8 Page - Agilent(Hewlett-Packard) |
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HLMP-S501 Datasheet(HTML) 8 Page - Agilent(Hewlett-Packard) |
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8 / 9 page  Precautions Lead Forming • The leads of an LED lamp may be preformed or cut to length prior to insertion and soldering into PC board. • If lead forming is required before soldering, care must be taken to avoid any excessive mechanical stress induced to LED package. Otherwise, cut the leads of LED to length after soldering process at room temperature. The solder joint formed will absorb the mechanical stress of the lead cutting from traveling to the LED chip die attach and wirebond. • It is recommended that tooling made to precisely form and cut the leads to length rather than rely upon hand operation. Soldering Conditions • Care must be taken during PCB assembly and soldering process to prevent damage to LED component. • The closest LED is allowed to solder on board is 1.59 mm below the body (encapsulant epoxy) for those parts without standoff. • Recommended soldering conditions: • Wave soldering parameter must be set and maintained according to recommended temperature and dwell time in the solder wave. Customer is advised to periodically check on the soldering profile to ensure the soldering profile used is always conforming to recommended soldering condition. • If necessary, use fixture to hold the LED component in proper orientation with respect to the PCB during soldering process. • Proper handling is imperative to avoid excessive thermal stresses to LED components when heated. Therefore, the soldered PCB must be allowed to cool to room temperature, 25 °C, before handling. • Special attention must be given to board fabrication, solder masking, surface plating and lead holes size and component orientation to assure solderability. • Recommended PC board plated through hole sizes for LED component leads: Manual Solder Wave Soldering Dipping Pre-heat Temperature 105 °C Max. – Pre-heat Time 30 sec Max. – Peak Temperature 250 °C Max. 260 °C Max. Dwell Time 3 sec Max. 5 sec Max. LED Component Plated Through Lead Size Diagonal Hole Diameter 0.457 x 0.457 mm 0.646 mm 0.976 to 1.078 mm (0.018 x 0.018 inch) (0.025 inch) (0.038 to 0.042 inch) 0.508 x 0.508 mm 0.718 mm 1.049 to 1.150 mm (0.020 x 0.020 inch) (0.028 inch) (0.041 to 0.045 inch) Note: Refer to application note AN1027 for more information on soldering LED components. Figure 7. Recommended wave soldering profile. LAMINAR WAVE BOTTOM SIDE OF PC BOARD HOT AIR KNIFE TURBULENT WAVE FLUXING PREHEAT 010 20 30 50 100 150 200 250 30 40 50 TIME – SECONDS 60 70 80 90 100 TOP SIDE OF PC BOARD CONVEYOR SPEED = 1.83 M/MIN (6 FT/MIN) PREHEAT SETTING = 150 °C (100°C PCB) SOLDER WAVE TEMPERATURE = 245 °C AIR KNIFE AIR TEMPERATURE = 390 °C AIR KNIFE DISTANCE = 1.91 mm (0.25 IN.) AIR KNIFE ANGLE = 40 ° SOLDER: SN63; FLUX: RMA NOTE: ALLOW FOR BOARDS TO BE SUFFICIENTLY COOLED BEFORE EXERTING MECHANICAL FORCE. 8 |
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