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Application Notes
DC Power Systems for Life and Durability Testing
New product life and durability testing (life testing) is critical in highly competitive markets. Life testing takes thousands of hours, and the test instrumentation you use must be up to the task. Central to life testing are the device-under-test (DUT) power source and power distribution system.
DUT power system requirements for life testing applications are demanding. Life testing facilities use temperature chambers to apply lengthy environmental stresses to the DUTs. The instrumentation rack is usually located outside the chamber, so the DC power supply can be several meters from the DUTs. Wire resistance, inductance and capacitance can all combine to impede delivery of power. Transient response may be impacted, resulting in voltage overshoot with abrupt current level change. As a result, the DC power distribution must be carefully designed for these long distances.
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