November 2016
Intermediate to advanced
1008 pages
27h 59m
English
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2.6. Power Diode
The power diode is a unijunction unidirectional semiconductor device, which is used for the implementation of uncontrolled rectifier topologies. It is also used in power inverters (dc to ac) as a freewheeling diode as well as in many other converter topologies for several reasons. There are power diodes with nominal current value of up to 7500 A and nominal blocking voltage capability of up to 7500 V. Their switching period varies from 1 ms in very high power applications (MW) to some hundreds of nanoseconds in very low power applications (mW). Fig. 2.7 presents the diode's symbol and its crystal cross section. As can be seen, the diode has two terminals, the anode and the cathode. It is a two-layer device, consisting of an n-type ...
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