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Power cycling test (PCT), also known as active temperature cycling test, is a test method that involves switching on and off power electronic devices repeatedly to verify reliability and stability under various environmental conditions and over time. The objective is to identify any issues with the device that may arise from power cycling. During PCT, the power chips are actively heated by the losses generated in the power devices themselves. Among current technologies, PCT is one of the most application-like reliability verification methods for power electronic devices.

Procedure

 * 1) Test plan: analyze the devices to be tested. Develop a test plan that includes suitable test construction and the corresponding test parameters, such as the on and off periods, the environmental conditions, the number of cycles etc.
 * 2) Preparation and setup: gather the necessary equipment. Set up the test environment and the device to be tested. Connect any necessary monitoring and test equipment.
 * 3) Test execution and data collection: Execute the test by turning the device on and allowing it to operate normally for a specified period of time. Then turn the device off, either by physically removing power or through software controls. Leave the device in a powered-off state for a specified period of time, and then turn it back on and repeat the process multiple times. Collect data simultaneously during the test, such as device performance data, power supply data, and environmental data, to monitor the device's behavior during the test.
 * 4) Test evaluation: Document and evaluate the test results to identify any issues or problems that may have arisen from the power cycling, such as device degradations, hardware or software failures, or environmental factors.

Standards
JEDEC JESD22-A105D: "POWER AND TEMPERATURE CYCLING" (2020)

ECPE Guideline AQG 324 "Automotive Qualification Guideline"