Power transistor has overvoltage protection stage that does not work against gate drive source and reliably prevents occurrence of avalanche operating state

摘要

The power transistor has an overvoltage protection stage to prevent an avalanche operating state, with at least one control gate (10) for a main current channel between drain (12) and source (14) connections of a main transistor (8) and at least one auxiliary gate (20) for an auxiliary current channel between drain (16) and source (18) connections of an auxiliary transistor (9). The auxiliary gate is connected to the drain connections via a blocking protective Zener diode (21).