source:Industry News Popular:adapter release time:2022-01-12 09:14:15 Article author:sznbone
Power aging is a very effective screening method, and it is one of the necessary screening methods for highly reliable switch adapter products. Power aging helps to expose and eliminate potential defects in early failure devices as soon as possible by applying excessive electrical stress to the adapter. It can effectively eliminate process defects generated during the device production process.
Power aging is usually to place the switch adapter under high temperature conditions and apply the maximum voltage and load to obtain a large enough screening stress to achieve the purpose of eliminating early failure products. The applied electrical stress includes the input AC high voltage, power aging, and voltage shock. The internal components of the switch adapter can withstand the maximum power consumption and stress in the working state during the aging process. Super-power aging obviously shortens the aging time, but it may also cause the instantaneous load of the device to exceed the maximum rating, damage the qualified device, and even cause instant degradation or breakdown. Some products may still work temporarily, but their life span is shortened. Therefore, for super-power aging, it is not that the more the overweight, the more effective it is, but the best over-load amount should be selected. The more consistent method now is to apply the maximum rated power to the adapter, and to extend the aging time appropriately, which is a more reasonable method of screening for electrical power aging.
The purpose of reliability screening test design is to determine test conditions, including test items, test stress and test time. Due to different types of products, different manufacturers or products produced by different materials, structures, and technological processes, the failure mechanism is different, and the boundary between early and accidental failures is also not the same, it is difficult to formulate A uniform reliability screening test condition suitable for various products. Therefore, a large number of reliability tests or reliability screening tests must be carried out according to the characteristics of the product, and the failure distribution of the product and the relationship between the failure mechanism and the screening test items, stress and time must be grasped, and then the reliability of the product can be correctly drawn up Screen test conditions.
Obviously, if the reliability screening test conditions are not appropriate, it may cause some products to fail to meet the requirements of reliability and stability due to insufficient screening test intensity, or the part of early failure products may fail due to missing necessary screening test items. Can be filtered out. In addition, some of the originally good products may be eliminated due to the strict screening test conditions.
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