ixysreservestherighttochangelimits,testconditionsanddimensions ?2011ixysallrightsreserved ixyskorealtd. 1 ixyscorporation 9065iuidong,yeongtonggu,suwon,gyeonggido,korea 1590buckeyedrive,milpitas,ca950357418 phone+82318885232,fax+82318885233 rev.aug.2011 phone(408)4579000,fax4084960670 ixolar tm highefficiencysolarbit. description ixolar tm solarbitsareixysproductlineofsolarbitsmadeofmonocrystalline,highefficiencysolar cells.theixolar tm solarbitsisanidealforchargingvariousbatterypoweredandhandheldconsumer productssuchasmobilephones,cameras,pdas,mp3playersandtoys.theyarealsosuitablefor industrialapplicationssuchaswirelesssensors,portableinstrumentationandforchargingemergency backupbatteries. withacellefficiencyoftypically22%measuredatawaferlevel,solarbitsgivetheabilitytoextendrun timeevenin"lowlight"conditionsandincreasebatterylifeandruntimeinasmallfootprint,whichcanbe easilyaccommodatedinthedesignofportableproducts.thedesignallowsconnectingsolarbitsflexiblyin seriesand/orparalleltoperfectlymeettheapplicationspowerrequirements. ixolar tm productshaveaverygoodresponseoverawidewavelengthrangeandthereforecanbeusedin bothindoorandoutdoorapplications. productandorderinginformation(packagelevel) (parametersgivenaretypicalvalues) dimensions(lxwxh):22x7x1.8[mm] solarbitsweight:0.5grams solarbitsarecomplianttotherohsnorm. electricalcharacteristics symbol cellparameter typical ratings* units v oc opencircuitvoltage 1.89 v j sc shortcircuitcurrentdensity (waferlevel) 42.4 ma/cm 2 v mpp voltageatmax.powerpoint 1.50 v j mpp currentdensityatmax.powerpoint(waferlevel) 37.2 ma/cm 2 p mpp maximumpeakpower (waferlevel) 18.6 mw/cm 2 ff fillfactor >65 % solarcellefficiency (waferlevel) 22 % v oc / t opencircuitvoltagetemp.coefficient(waferlevel) 2.1 mv/k j sc / t shortcircuitcurrenttemp.coefficient(waferlevel) 0.12 ma/(cm2k) *allvaluesmeasuredatstandardcondition:1sun(=100mw/cm2),airmass1.5,25c partnumber opencircuit voltage[v] shortcircuit current[ma] typ.voltage @p mpp [v] typ.current @p mpp [ma] kxob2204x3 1.89 15 1.50 13.38 features ?monocrystallinesilicontechnology ?highefficiencyoutdoorandindoor ?longlifeandstableoutput ?sealedpackage ?highmechanicalrobustness ?surfacemountpackage ?reflowsolderable applications ?batterychargersforportablessuchascell phones,pdas,gpssystems, ?greenelectricitygeneration ?powerbackupforups,sensors,wearables advantages ?automaticpick&placemounting ?oneproductformultipleapplications ?flexibleintegrationintotheapplication
ixysreservestherighttochangelimits,testconditionsanddimensions ?2011ixysallrightsreserved ixyskorealtd. 2 ixyscorporation 9065iuidong,yeongtonggu,suwon,gyeonggido,korea 1590buckeyedrive,milpitas,ca950357418 phone+82318885232,fax+82318885233 rev.aug.2011 phone(408)4579000,fax4084960670 typicalsolarbitperformancedata externalquantumefficiency
ixysreservestherighttochangelimits,testconditionsanddimensions ?2011ixysallrightsreserved ixyskorealtd. 3 ixyscorporation 9065iuidong,yeongtonggu,suwon,gyeonggido,korea 1590buckeyedrive,milpitas,ca950357418 phone+82318885232,fax+82318885233 rev.aug.2011 phone(408)4579000,fax4084960670 packagefrontsideandbacksideview. solarbitpaddesign. (dimensionsinmillimeters) frontsideviewdetails backsideviewdetails solarbitpcblayoutrecommendation: thepcblayoutfootprintshouldbeequivalenttothelayoutofthesolarbitbutonthecontactpadsontheshortend(s)itshouldbe halfamillimeterlargerthanthesolarbit.forthekxob2204x3onemayusetwopadsof(6x2.5)mmsizewith18mmspacing. moisturesensitivity,reflowsolderingandwashinginformation ixyshascharacterizedthemoisturereflowsensitivityofthesolarbitusingipc/jedecstandardjstd020.moistureuptakefrom atmospherichumidityoccursbydiffusion.duringthesolderreflowprocess,inwhichthecomponentisattachedtothepcb,thewhole bodyofthecomponentisexposedtohighprocesstemperatures.thecombinationofmoistureuptakeandhighreflowsoldering temperaturesmayleadtomoistureinduceddelaminationandcrackingofthecomponent.topreventthis,thiscomponentmustbe handledinaccordancewithipc/jedecstandardjstd020perthelabeledmoisturesensitivitylevel(msl),level1.ixysdoesnot recommendtheuseofchlorinatedsolvents. uponreflowsolderingforsurfacemounting,werecommendtouselowtemperaturesolderpastelikeleadfreesn57bi1ag compositepaste.forinstance,werecommendtheleadfreesolderpastelst5710manufacturedbyseoulalloymetalco.ltd,where itrecommends2203 cpeaktemperaturesatthereflowzoneabove200 cforabout1min. tubecarrierpackaging solarbitsareshippedin460mmlongclearpvccarriertubeswithantistaticcoating.atubecontains20solarbitdevices.
ixysreservestherighttochangelimits,testconditionsanddimensions ?2011ixysallrightsreserved ixyskorealtd. 4 ixyscorporation 9065iuidong,yeongtonggu,suwon,gyeonggido,korea 1590buckeyedrive,milpitas,ca950357418 phone+82318885232,fax+82318885233 rev.aug.2011 phone(408)4579000,fax4084960670 background some basic information needs to be covered to better understand what to expect in terms of the solarbits performance with regards to solar cell type, lighting conditions in terms of power density, and general industry standards as they relate to battery charging. solar cell types keep in mind these cost and performance tradeoffs when comparing various solar cell materials: polycrystalline cells are commonly found in outdoor applications and have a spectral sensitivity range of 500nm to 1100nm. theyre in the medium price range and typically offer a 13% power conversion efficiency. monocrystalline cells, such as the ixys solarmd , have a spectral sensitivity range from 300 nm (near-ultraviolet) to 1100 nm (near-infrared), which includes visible light (400 to 700 nm). due to this wide spectral range, they can be used in both indoor and outdoor applications. monocrystalline or single-crystalline material is the most expensive but it does not contain impurities, and as such the power conversion efficiency does not degrade over operating time. the power conversion efficiency of commercially available monocrystalline cells ranges from 15 to 22%. the surface of these cells is a homogenous dark blue or dark grey. finally, amorphous cells, which work in the spectral range of 300nm to 600nm, are used predominantly indoors in products such as solar powered calculators since they are not sensitive to the upper light spectrum and cannot take advantage of natural sunlight. they offer about 5% power conversion efficiency and are mostly used with ultra low power devices like clocks and electronic calculators. amorphous cells, like polycrystalline cells, suffer from efficiency degradation.
ixysreservestherighttochangelimits,testconditionsanddimensions ?2011ixysallrightsreserved ixyskorealtd. 5 ixyscorporation 9065iuidong,yeongtonggu,suwon,gyeonggido,korea 1590buckeyedrive,milpitas,ca950357418 phone+82318885232,fax+82318885233 rev.aug.2011 phone(408)4579000,fax4084960670 solarbit description solarbits are monocrystalline, high-efficiency solar cells in a surface mount package. theyre robust and can be used in harsh environments. solarbits have a very high (22%) power conversion efficiency, which means that 22% of the light energy is converted into electrical energy. theyre extremely useful in applications requiring solar power generation in a limited space. monocrystalline cells can be used in indoor and outdoor applications because they have a wide spectral sensitivity, 300 to 1100 nm. however, the output power of a solar cell is proportional (over a wide range) to the incoming light energy, and irradiance is generally much higher outdoors. the values in the data sheet are measured at standard condition of 1 sun, which is equal to 1000w per square meter sunlight irradiance at a defined light spectrum (air mass of 1.5) and 25c cell temperature.
ixysreservestherighttochangelimits,testconditionsanddimensions ?2011ixysallrightsreserved ixyskorealtd. 6 ixyscorporation 9065iuidong,yeongtonggu,suwon,gyeonggido,korea 1590buckeyedrive,milpitas,ca950357418 phone+82318885232,fax+82318885233 rev.aug.2011 phone(408)4579000,fax4084960670 relative lighting power density the figure above compares relative power density for various lighting conditions in units of watts per square meter (w/m 2 ). the reference standard condition is 1 sun and is equal to 1000 watts per square meter of sunlight irradiance at a constant 25c cell temperature and at 1.5 air mass (air mass stands for a well defined light spectrum which appears if the sunlight goes through the earths athmosphere at a defined angle). as the chart clearly shows, the power density of typical indoor lighting is dramatically lower than that of sunlight. not only is irradiance from indirect and artificial light lower; the spectrum is also narrower. in typical office space lighting with a spectrum produced from incandescent or halogen light bulbs, the power output may be roughly 100 times less than bright sunlight. it may be 200 to 500 times less with fluorescent lighting due to the further limited spectrum. ixys makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication and reserves the right to make changes to specifications and product descriptions at any time without notice. neither circuit patent licenses or indemnity are expressed or implied. except as set forth in ixys standard terms and conditions of sale, ixys assumes no liability whatsoever, and disclaims any express or implied warranty relating to its products, including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right. the products described in this document are not designed, intended, authorized, or warranted for use as components in systems intended for surgical implant into the body, or in other applications intended to support or sustain life, or where malfunction of ixys product may result in direct physical harm, injury, or death to a person or severe property or environmental damage. ixys reserves the right to discontinue or make changes to its products at any time without notice.
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