www.roithner - laser.com 1 uvtop2 7 0 - smd description uvtop2 7 0 - smd is a series of algan based surface mount deep uv - leds with a typical peak wavelength of 2 7 5nm and optical output power of 400 -8 0 0 w . it comes in ceramic smd package with different lens configuration s available . uvtop2 7 0 - smd is widely used for forensic analysis , disinfection , water ster ilization , protein analysis, dna sequencing and drug discovery. maximum ratings (t case = 25c ) parameter symbol values unit min. max. power dissipation, dc * p d 20 0 mw forward current, dc i f 30 ma pulsed current (1% duty cycle, 1khz) i fp 200 ma reverse voltage u r - 6 v operating temperature t opr - 30 +55 c storage temperature t stg - 30 + 100 c soldering temperature (max. 5s) t sol +190 c * m aximum dissipated power must not exceed 200mw without thermal management general ch aracteristics (t case = 25c, i f = 20ma ) parameter symbol values unit min. * typ. * max. * peak wavelength p 275 28 5 nm half width (fwhm) ? 12 15 nm forward voltage u f 6. 2 7.5 v *wavelength measurement tolerance: 2 nm , forward voltage measurement tolerance : 2 % electro - optical characteristics (t cas e = 25c, i f = 20ma ) part number window optical power p out (w) view. angle 2? 1/2 () min. * typ. * typ. uvtop27 0 - hl - smd hemisph erical lens 400 800 20 uvtop27 0 - e w - smd encapsulated window 400 800 120 uvtop27 0 - f w - smd flat window 400 800 120 uvtop270 - n w - smd no window 400 800 1 20 * typical values only, not guaranteed specifications, output power measurement tolerance: 10 %, v 1.0 11.07 .2013
www.roithner - laser.com 2 performance characteristic s normalized output power vs. wavelength peak wavelength vs. forward c urrent forward voltage vs. forward current output power vs. forward current normalized output power vs. temperature normalized forward voltage vs. temperature
www.roithner - laser.com 3 emission characteristics uvtop270 - hl - smd, hemispherical lens uvtop270 - ew - smd, encapsulated window uvtop270 - fw - smd, flat window uvtop270 - nw - smd, no window
www.roithner - laser.com 4 outline dimensions uvtop270 - hl - smd all dimensions in mm uvtop270 - ew - smd all dimensions in mm uvtop270 - fw - smd all dimensions in mm
www.roithner - laser.com 5 outline dimensions uvtop270 - nw - smd all dimensions in mm device materials part material package c eramic lens sio 2 bonding wires au
www.roithner - laser.com 6 precautions soldering: ? do avoid o verheating of the led ? do avoid e lectrostatic discharge (esd) ? do avoid m echanical stress , shock, and vibration ? do only use non - corrosive flux. ? do not apply current to the led until it has cooled down to room temperature after soldering recommended soldering conditions: dip s oldering hand s oldering pre - heat t ime max 30 s soldering t ime max 5 s dipping t ime m ax 5 s solder bath t emperature max 190 c solder t emperature max 190 c above table specifies the maximum allowed duration and temperature during soldering. it is strongly advised to perform soldering at the shortest time and lowest temperature possible . cleaning : cleaning with isopropyl alcohol, propanol, or ethyl alcohol is recommended do not use acetone, chloroseen, trichloroethylene, or mks do not use ultrasonic cleaners static electricity: uvtop l e ds are sensitive to electrostatic discharge (esd) . precautions against esd must be taken when handling or operating these leds. surge voltage or electrostatic discharge can result in complete failure of the device. uv - radiation: during operation these leds do emit high intensity ultraviolet light , which is hazardous to skin and eyes , and may cause cancer. do avoid exposure to the emitted uv light. protective glasses are recommended . it is further advised to attach a warning label on products/systems that do utilize uv - leds: operation : do only operate uvtop leds with a current source. running these leds from a voltage source will result in complete failure of the device. current of a led is an exponential function of the vol t a ge across it. usage of current regulated drive circuits is mandatory ? all rights reserved the above specifications are for reference purpose only and subjected to change without prior notice class 1
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