AOS Semiconductor Product Reliability Report AOD468, rev A Plastic Encapsulated Device ALPHA & OMEGA Semiconductor, Inc www.aosmd.com 1 This AOS product reliability report summarizes the qualification result for AOD468. Accelerated environmental tests are performed on a specific sample size, and then followed by electrical test at end point. Review of final electrical test result confirms that AOD468 passes AOS quality and reliability requirements. The released product will be categorized by the process family and be monitored on a quarterly basis for continuously improving the product quality. Table of Contents: I. II. III. IV. Product Description Package and Die information Environmental Stress Test Summary and Result Reliability Evaluation I. Product Description: The AOD468 is fabricated using an advanced high voltage MOSFET process that is designed to deliver high levels of performance and robustness in popular AC-DC applications. By providing low RDS(on), Ciss and Crss along with guaranteed avalanche capability this device can be adopted quickly into new and existing offline power supply designs. This device is ideal for boost converters and synchronous rectifiers for consumer, telecom, industrial power supplies and LED backlighting. -RoHS Compliant -Halogen Free Details refer to the datasheet. II. Die / Package Information: AOD468 Standard sub-micron High voltage N channel process Package Type 3 leads TO252 Lead Frame Bare Cu Die Attach Soft solder Bond wire Al wire Mold Material Epoxy resin with silica filler Moisture Level Up to Level 1 * Note * based on info provided by assembler and mold compound supplier Process 2 III. Result of Reliability Stress for AOD468 Test Item Test Condition Time Point MSL Precondition 168hr 85°c /85%RH +3 cycle reflow@260°c Temp = 150°c , Vgs=100% of Vgsmax - Temp = 150°c , Vds=80% of Vdsmax 168hrs 500 hrs 1000 hrs 1 lot 130 +/- 2°c , 85%RH, 33.3 psi, Vgs = 80% of Vgs max 121°c , 29.7psi, RH=100% 100 hrs HTGB Lot Attribution 9 lots 168hrs 500 hrs 1000 hrs HAST Pressure Pot 96 hrs -65°c to 150°c , air to air, 250 / 500 cycles Reference Standard 0 JESD22A113 77pcs 0 JESD22A108 77 pcs / lot 77pcs 0 JESD22A108 (Note A*) 9 lots 77 pcs / lot 495pcs 0 JESD22A110 (Note A*) 55 pcs / lot 0 JESD22A102 0 JESD22A104 1 lot 5 lots (Note A*) Temperature Cycle Number of Failures 1210pcs (Note A*) HTRB Total Sample size 8 lots (Note A*) 275pcs 55 pcs / lot 440pcs 55 pcs / lot Note A: The reliability data presents total of available generic data up to the published date. IV. Reliability Evaluation FIT rate (per billion): 23 MTTF = 4957 years The presentation of FIT rate for the individual product reliability is restricted by the actual burn-in sample size of the selected product (AOD468). Failure Rate Determination is based on JEDEC Standard JESD 85. FIT means one failure per billion hours. 2 9 9 Failure Rate = Chi x 10 / [2 (N) (H) (Af)] = 1.83 x 10 9 7 MTTF = 10 / FIT = 4.34 x 10 hrs = 4957 years / [2x2x77x1000x258] = 23 Chi² = Chi Squared Distribution, determined by the number of failures and confidence interval N = Total Number of units from HTRB and HTGB tests H = Duration of HTRB/HTGB testing Af = Acceleration Factor from Test to Use Conditions (Ea = 0.7eV and Tuse = 55°C) Acceleration Factor [Af] = Exp [Ea / k (1/Tj u – 1/Tj s)] Acceleration Factor ratio list: Af 55 deg C 70 deg C 85 deg C 100 deg C 115 deg C 130 deg C 150 deg C 258 87 32 13 5.64 2.59 1 Tj s = Stressed junction temperature in degree (Kelvin), K = C+273.16 Tj u =The use junction temperature in degree (Kelvin), K = C+273.16 k = Boltzmann’s constant, 8.617164 X 10-5eV / K 3