Diode Effects Bring Liefetime Risks to Series Resistors
Conference: PCIM Europe 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/16/2017 - 05/18/2017 at Nürnberg, Deutschland
Proceedings: PCIM Europe 2017
Pages: 5Language: englishTyp: PDF
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Authors:
Frank, Wolfgang (Infineon Technologies AG, Germany)
Abstract:
The limited pulse power capability of resistors is often underestimated in cases of bootstrap and desaturation detection (DESAT) circuits. This contribution investigates the behavior of high voltage diodes, series-connected to a resistor and operated with fast transient reverse voltages. The evaluation is taking simulation and measurements into account. Since the critical cases of operation are different within bootstrapping and DESAT circuits, both cases are explained here in detail. It is worked out that capacitive pulse currents can have a severe lifetime impact on resistors which are connected in series to such diodes.