What are the reliability testing and life evaluation standards for integrated high-power inductors?

The reliability testing and life evaluation standards for integrated high-power inductors mainly include the following aspects:

Temperature rise test: By measuring the temperature change of the inductor under rated power, it evaluates its thermal stability under long-term operation. The smaller the temperature change, the better the heat dissipation performance of the inductor and the longer its life.

Withstand voltage test: Test the inductor's withstand voltage capability at rated voltage to ensure that it will not cause electrical breakdown or insulation damage during operation. The number and time of withstand voltage tests are usually determined based on the specifications and reliability requirements of the product.

Cyclic loading test: The inductor is repeatedly loaded and unloaded to simulate the voltage and current changes it endures during operation to evaluate its mechanical stability and fatigue life. The number and time of cyclic loading are determined according to the specifications and reliability requirements of the product.

Environmental testing: including temperature cycle testing, humidity testing, salt spray testing, etc., to evaluate the stability and reliability of the inductor under different environmental conditions. These tests typically simulate extreme conditions in actual operating environments to verify the suitability and reliability of the inductor.

Life assessment: Evaluate the life of the inductor through accelerated aging tests, life prediction models and other methods. Accelerated aging tests are usually conducted under harsh conditions to accelerate the aging process of the inductor; the life prediction model predicts the life and reliability of the inductor based on its performance parameters and working environment.

In addition to the above aspects, there are other evaluation criteria, such as electrical performance testing, visual inspection, vibration testing, etc. Taken together, these standards can comprehensively evaluate the reliability of integrated high-power inductors and provide a basis for their life prediction and reliability management.