Transcription of Physical Explanation - Vishay Intertechnology
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Physical Explanation - Vishay Intertechnology
Vishay GENERAL SEMICONDUCTORR ectifiersApplication NotePhysical ExplanationAPPLICATION NOTE Revision: 16-Aug-111 Document Number: 84064 For technical questions within your region: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT TERMINOLOGYS emiconductor diodes are used as rectifiers, switches,varactors and voltage stabilizers (see Zener data book).Semiconductor diodes are two-terminal solid-state deviceshaving asymmetrical voltage-current characteristics. Unlessotherwise stated, this means a device has single pn-junctioncorresponding to the characteristics shown in figure 1. Fig. 1 An application of the voltage current curve is given bywhereIf the diode is forward-biased (anode positive with respectto cathode), its forward current (I = IF) increases rapidly withincreasing voltage. That is, its resistance becomes very the diode is reverse-biased (anode negative with respectto cathode), its reverse current (-I = IR) is extremely low.
diode is in a reverse avalanche mode with a reverse current at the beginning which is equal to the current that was flowing through the inductance just before it was switched off. The reverse energy capability depends on the reverse current and the junction temperature prior to …
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