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A Company of Good People Copyright © Seoul Semiconductor All Rights Reserved 1 www.acriche.com/ www.zledstore.com LM80 Reliability data for STW8Q2PA 2010. 06. 10
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A Company of Good People Copyright © Seoul Semiconductor All Rights Reserved 2 1. Number of LED Light Sources tested 20ea per test 2. Description of LED light sources PKG tested: TOP 5630 Series Part No. STW8Q2PA 3. Description of auxiliary equipment STW8Q2PA of the 5630 series are soldered to reliability board that can accommodate up to 20 devices. STW8Q2PA LEDs are connected in series strings of up to 20 devices and driven by constant current sources of three. Reliability boards are mounted in a reliability chamber that maintain constant thermal surrounding. The test boards are cyclically removed from the chamber for testing. Tester: integrating Cylinder, a computer-controlled x-y table, programmable current-source meter, and relay switching-matrix. STW8Q2PA is positioned next to the cylinder and driven by a constant current source. IV, forward current, chromaticity is measured for each TOP LEDs. 4. Operating cycle LEDs are driven with a constant DC Voltage. 5. Ambient conditions including airflow, temperature and relative humidity The case temperature within the chamber with minimal airflow was characterized by several thermocouples connecting to reliability board. Ambient temperature and the relative humidity was also characterized in the specified chambers. All test data were read after condition reached thermal equilibrium.
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A Company of Good People Copyright © Seoul Semiconductor All Rights Reserved 3 6. Case temperature (test point temperature) The thermal characterization results are summarized in the table below. 7. Drive Current of the LED light source during lifetime test. @100mA 8. Lumen maintenance data and forward current along with average value, standard deviation minimum and maximum lumen maintenance value for all of the LED light sources. See table. Required LM80 test temperature (Ts) Forward CurrentActual T a 25 ℃ 100 mA 13 ℃ 55 ℃ 100 mA 37 ℃ 85 ℃ 100 mA 71 ℃
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A Company of Good People Copyright © Seoul Semiconductor All Rights Reserved 4 Stress condition: Ts 25 ℃, 100mA Voltage data Stress condition: Ts 25 ℃, 100mA IV data Stress condition: Ts 25 ℃, 100mA Normalized IV data 0hr1000hr2000hr3000hr4000hr5000hr6000hr Max3.1723.1593.1963.2053.2183.2073.211 Avg3.068 3.0783.0773.0843.0703.092 Min3.0062.9672.9752.9682.9693.0043.015 0hr1000hr2000hr3000hr4000hr5000hr6000hr Max9.5229.4019.3999.3699.3399.2889.229 Avg8.6518.5118.4618.4448.4198.3948.324 Min8.2178.0297.9637.9327.9217.9957.909 0hr1000hr2000hr3000hr4000hr5000hr6000hr Max1.0000.9990.9970.9950.9920.9960.993 Avg1.0000.9840.9780.9760.9730.9700.962 Min1.0000.9680.9590.9580.9570.9490.937
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A Company of Good People Copyright © Seoul Semiconductor All Rights Reserved 5 Stress condition: Ts 55 ℃, 100mA Voltage data Stress condition: Ts 55 ℃, 100mA IV data Stress condition: Ts 55 ℃, 100mA Normalized IV data 0hr1000hr2000hr3000hr4000hr5000hr6000hr Max3.2253.263 3.2783.2793.2753.279 Avg3.1493.1583.1523.1603.1643.1673.177 Min2.9883.000 3.0163.0203.0273.040 0hr1000hr2000hr3000hr4000hr5000hr6000hr Max9.1739.1139.1089.0999.0688.9528.779 Avg9.0258.9178.8108.7818.7608.6708.584 Min8.8268.7298.6058.5488.5318.3098.245 0hr1000hr2000hr3000hr4000hr5000hr6000hr Max1.000 0.9990.9980.9950.9860.970 Avg1.0000.9880.9760.9730.9710.9610.951 Min1.0000.9740.9610.9540.9520.9400.934
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A Company of Good People Copyright © Seoul Semiconductor All Rights Reserved 6 Stress condition: Ts 85 ℃, 100mA Voltage data Stress condition: Ts 85 ℃, 100mA IV data Stress condition: Ts 85 ℃, 100mA Normalized IV data 0hr1000hr2000hr3000hr4000hr5000hr6000hr Max9.1709.1019.0289.0078.9848.8218.778 Avg9.0928.8888.8128.7598.7328.6108.507 Min9.0058.6618.5628.4498.4248.3208.308 0hr1000hr2000hr3000hr4000hr5000hr6000hr Max1.0000.9990.9900.9870.9860.9680.961 Avg1.0000.969 0.9630.9600.9470.936 Min1.0000.9570.9490.9370.9350.9240.922 0hr1000hr2000hr3000hr4000hr5000hr6000hr Max3.153.163.173.183.193.18 Avg3.243.273.283.293.30 3.29 Min3.002.993.033.043.053.043.05
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A Company of Good People Copyright © Seoul Semiconductor All Rights Reserved 7 9. Observation of LED light source failures including the failure conditions and time of failure. No failures occurred during these tests. 10. LED light source monitoring interval Tested at 0, 1000, 2000, 3000, 4000, 5000, 6000hr 11. Chromaticity shift reported over the measurement time. Stress condition: Ts 25 ℃, 100mA Chromaticity data 0 hr1000 hr2000 hr3000 hr4000 hr5000 hr6000 hr Initial ᇫ u' Max.0.0000 -0.0005-0.0001-0.0008-0.0007-0.0013 Avg.0.0000-0.0005-0.0007-0.0008-0.0013-0.0015-0.0024 Min.0.0000-0.0009-0.0011-0.0014-0.0024-0.0034-0.0045 Initial ᇫ v' Max.0.00000.000870.000430.00070.0000-0.0007-0.0014 Avg.0.00000.00026-0.00001-0.0003-0.0009-0.0018-0.0030 Min.0.0000-0.00018-0.00053-0.0014-0.0026-0.0044-0.0049
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A Company of Good People Copyright © Seoul Semiconductor All Rights Reserved 8 Stress condition: Ts 55 ℃, 100mA Chromaticity data Stress condition: Ts 85 ℃, 100mA Chromaticity data 0 hr1000 hr2000 hr3000 hr4000 hr5000 hr6000 hr Initial ᇫ u' Max.0.0000-0.0002-0.0003-0.0001-0.0004-0.0014-0.0011 Avg.0.0000-0.0004-0.0006-0.0005-0.0009-0.0021-0.0030 Min.0.0000-0.0008-0.0009-0.0012-0.0017-0.0026-0.0042 Initial ᇫ v' Max.0.00000.000600.000610.00060.0002-0.0009-0.0004 Avg.0.00000.000370.000180.0000-0.0004-0.0023-0.0036 Min.0.0000-0.00035-0.00021-0.0011-0.0015-0.0030-0.0055 0 hr1000 hr2000 hr3000 hr4000 hr5000 hr6000 hr Initial ᇫ u' Max.0.0000-0.0002-0.0007 -0.0013-0.0024-0.0031 Avg.0.0000-0.0007-0.0012-0.0015-0.0022-0.0038-0.0043 Min.0.0000-0.0013-0.0019-0.0021-0.0028-0.0057-0.0058 v' ᇫ v' Max.0.0000-0.00014-0.00036-0.0020-0.0028-0.0030-0.0032 Avg.0.0000-0.00091-0.00112-0.0028-0.0037-0.0045-0.0050 Min.0.0000-0.00169-0.00184-0.0034-0.0044-0.0063-0.0065
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