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IGBT reverse conduction characteristics Hard …
COMPANY CONFIDENTIAL18 igbt reverse conduction characteristicsHard- switching and soft-switchingEnergy Saving Products BUJuly 2013 COMPANY CONFIDENTIAL19 The igbt in reverseThe igbt is a four-layer structure (P-N-P-N).It has a well-defined blocking capability in one direction and a weak and undefined blocking capability in the reverse in topologies with reverse conducting requirements (bridge) need an anti-parallel diode, normally co-packaged with the topologies (boost PFC) do not require an anti-parallel series blocking diode must be added to IGBTs (and FETs) if the topology requires reverse blocking capability (current-fed converters).The MOSFET is a three-layer structure (N-P-N) with good reverse conduction more details follow the link below to appnote AN-983, Section 1, AN-983 COMPANY CONFIDENTIAL20 Advantages and disadvantages compared to a MOSFETThe diode co-packaged with the igbt is targeted to the MOSFET integral rectifier has a low voltage drop but reverse recovery characteristics are inadequate for high frequency co-packages three different types of diodes targeted to the application.
COMPANY CONFIDENTIAL 18 IGBT reverse conduction characteristics Hard-switching and soft-switching Energy Saving Products BU July 2013
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