07.04.2011 VL440-EMITTER 1 of 4 VL440-EMITTER technical data high power uv led, emitter features ? zener diode is built in the protective circuit against static electricity ? low voltage dc operated ? high power intensity ? lambertian radiation pattern ? instant light (less than 100ns) specifications (25c) item symbol value unit absolute maximum ratings dc forward current i f 350 ma peak pulse forward current * i fp 500 ma reverse voltage u r 5 v power dissipation p d 1300 mw operating temperature t op -40 ? +105 c storage temperature t stg -40 ? +120 c soldering temperature (for 5 sec.) t sol 260 5 c * note: 1/10 duty cycle at 1khz item symbol min. typ. max. unit optical specifications cw output power * 1 p o 250 - 350 mw peak wavelength * 2 p 435 440 445 nm viewing angle 140 deg. electrical specifications forward current i f - 350 - ma forward voltage * 3 v f 3.2 - 4.2 v * note: 1. peak wavelength measurement allowance is 2 nm 2. optical ouput measurement allowance is 10% 3. forward voltage measurement allowance is 0.2 v outline dimensons (unit: mm, tolerance: 0.2 mm) * note: the anode of the devise is denoted by a hole in the lead frame
07.04.2011 VL440-EMITTER 2 of 4 typical performance curves relative intensity vs. wavelength forward voltage vs. forward current forward voltage vs. forward current radiation pattern
07.04.2011 VL440-EMITTER 3 of 4 reliability no. test item test conditions note sample pass 1 room temperature operating life t a =25c, i f =350ma 1000 hrs. 20 ok 2 solder heat resistance 2605c, 5secs 20 ok 3 high temperature / high humidity operation life ta=85c, rh=85%, i f =350ma 1000 hrs. 20 ok 4 temperature cycle -40c ? +105c, 30 min dwell, 5 min transfer 200 cycles 20 ok 5 themal shock -40c ? +105c, 20 min dwell, 20 sec transfer 200 cycles 20 ok 6 high temperature storage tstg=120c 1000 hrs. 20 ok 7 low temperature storage tstg=-40c 1000 hrs. 20 ok 8 variable vibration frequency 10-2000-10hz 20g 1 min, 1.5mm, 3timesx/axis 20 ok 9 mechanical shock 1500g, 0.5msec pulse, 5 shocks each 6 axis 20 ok 10 natural drop on concrete from 1.2m, 3xtimes 20 ok conclusions: 1. the reliability tests were designed to evaluate both package integrity as well as workability of product performance over time. 2. all samples have done well by competed test required and passed all the qualification criteria with zero failure. from design standpoint, this package is robust enough to meet it?s data sheet conditions. 3. based on the food result shown on the above test, this product is qualified and released for market. precaution for use 1. cautions ? this device is a uv led, which radiates uv light during operation. ? do not look directly into the uv light or look through the optical system. to prevent in adequate exposure of uv radiation, wear uv protective glasses. 2. reflow soldering characteristics profile feature sn-pd eutectic assembly lead(pb)-free assembly average ramp-up rate (t smax to t p ) 3c / second max. 3c / second max. preheat temperature min (t smin ) 100c 150c preheat temperature max (t smax ) 150c 200c preheat time (t smin to t smax ) 60-120 seconds 60-180 seconds time maintained above temperature (t l ) 183c 217c time maintained above time (t l ) 60-150 seconds 60-150 seconds peak / classifivation temperature (t p ) 240c 260c time within 5c of actual peak temperature (t p ) 10-30 seconds 20-40 seconds ramp-down rate 6c / second max. 6c / second max. time 25c to peak temperature 6 minutes max. 8 minutes max.
07.04.2011 VL440-EMITTER 4 of 4 lead solder lead-free solder classification reflow profile (jedec j-std-020c) classification reflow profile (jedec j-std-020c) recommended soldering pattern note: ? electrical isolation is required between slug and solder pad. ? for optimal thermal performance, macimize board metalization at heat slug contact. ? reflow soldering should not be done more than one time. ? when soldering, do not put stress on the emitters during heating. ? after soldering, do not warp the circuit board 3. static electricity ? the leds are very sensitive to static electricity and surge voltage. so it is recommended that a wrist band or an anti-electrostatic glove be used when handling the leds. ? all devices, equipment and machinery must be grounded properly. it is recommended that precautions should be taken against surge voltage to the equipment that mounts the leds. 4. heat generation ? the powered leds generate heat. heat dissipation should be considered in the application design to avoid the environmental conditions for operation in excess of the absolute maximum ratings.
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