A Multi-Channel System for Active Thermal Cycling of Discrete Power Semiconductors Based on Mission Profiles

Within this paper a test system is introduced which is able to cycle multiple discrete power semiconductors in a hybrid manner within a wide temperature range, based on arbitrary programmable temperature mission profiles. Based on these profiles active power cycling is performed in combination with different static climatic conditions. The aim of this kind of test is to emulate the real thermal stress the device would undergo in harsh environments, where strong temperature changes could lead to a faster degradation of the device. With this approach the reliability of the device can be evaluated without the need for a lifetime model, as it is based on standard temperature cycling methods.