Evaluating different implementations of online junction temperature sensing for switching power semiconductors
2015
Switching power semiconductor online junction temperature (T j ) sensing is essential for device switching performance evaluation, device switching control, and device lifetime optimization. The contribution of this paper is a detailed evaluation of implementation issues (including circuit invasiveness, hardware integration, signal processing, and so forth) of different online T j sensing methods. This paper includes T j sensing methods based on device power dissipation, T j sensing methods based on the “diode-on-die technology”, T j sensing methods based on device on-state analysis, and T j sensing methods based on device switching transients. Advantages and limits of these methods are also provided.
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