An IGBT short-circuit detection and protection circuit comprising: an output terminal for outputting a PWM drive signal and being connected to gate terminals of a first IGBT (IGBT1) and a second IGBT (IGBT2), the first IGBT and the second IGBT ) A driving unit for simultaneously controlling on / off; A comparison unit comprising a threshold pin and a detection pin (Vdesat), the threshold pin being connected to a threshold voltage and the detection pin being connected by a first diode (D1) and a second diode (D3) (C) of the first IGBT and the second IGBT, respectively, and the detection pin supplies a detection current to the first diode and the second diode, and the cathode of the first diode and the second diode Wherein the comparison unit is connected to a collector of the first IGBT and a collector of the second IGBT, respectively; When the voltage at the detection pin is higher than the threshold voltage, the drive unit controls the first IGBT and the second IGBT such that the first IGBT and the second IGBT are turned off. The IGBT short-circuit detection protection circuit achieves bidirectional short-circuit protection of two IGBTs in the inverse series connection, without requiring additional protection circuitry.
展开▼
