HLMP-LG71-XZ0DD Broadcom

HLMP-LG70/71,HLMP-LB71 HLMP-LM71 4 mm Oval Precision Optical Performance LED Reliability Datasheet Description Failure Rate Prediction The following cumulative test results have been ob tained The failure rate of semiconductor devices is determined from testing performed at Avago Technologies in by the junction temperature of the device. The relation- accordance with the latest revisions of MIL-STD-883 and ship between ambient temperature and actual junction JIS C 7021. temperature is given by the following: T (C) = T (C) + P Avago Technologies tests parts at the absolute maximum J A JA AVG rated conditions recommended for the device. The actual where performance you obtain from Avago technolog ies parts T = ambient temperature in C A depends on the electrical and environmental character- = thermal resistance of junction-to-ambient in C/watt JA istics of your application but will probably be better than P = average power dissipated in watts the performance outlined in below tables. AVG The estimated MTBF and failure rate at temperatures lower than the actual stress temperature can be deter- mined by using an Arrhenius model for temperature acc eleration. Results of such calculations are shown in the table on the following page using activation energy of 0.43 eV (reference MIL-HDBK-217). Table 1. Life Tests Demonstrated Performance Point Typical Performance Failure Rate Stress Test Total Units Units Die Type Conditions Device Hrs. Tested Failed MTBF (% /1 K Hours) AllnGap T = 55 C 168,000 168 0 189200 0.53 A I = 47 mA F InGaN T = 55 C 672,000 672 0 747,100 0.13 A I = 23 mA FTable 2. Reliability Predictions (I = 20 mA) F Die Type: AllnGaP 2 Point Typical Performance Performance in Time 1 in Time (90% Confidence) (60% Confidence) Failure Rate Ambient Junction Failure Rate 1 2 Temperature (C) Temperature (C) MTTF (%/1 K Hours) MTTF (%/1 K Hours) 100 130 178300 0.56 71000 1.41 95 130 179500 0.56 71400 1.40 90 129 180600 0.55 71900 1.39 85 129 181800 0.55 72400 1.38 80 129 183000 0.55 72900 1.37 75 129 184200 0.54 73300 1.36 70 129 185500 0.54 73800 1.36 65 128 186700 0.54 74300 1.35 60 128 187900 0.53 74800 1.34 55 128 189200 0.53 75300 1.33 50 128 190400 0.53 75800 1.32 45 124 216200 0.46 86100 1.16 40 119 253800 0.39 101000 0.99 35 114 299300 0.33 119100 0.84 30 109 354400 0.28 141100 0.71 25 104 421500 0.24 167800 0.60 20 99 503700 0.20 200500 0.50 2