US 12,278,621 B2
Short circuit detection and protection for an insulated gate component by monitoring and checking the gate voltage
Francis Abdesselam, Chatou (FR)
Assigned to THALES, Courbevoie (FR)
Filed by THALES, Courbevoie (FR)
Filed on Nov. 7, 2022, as Appl. No. 17/982,436.
Claims priority of application No. 2111832 (FR), filed on Nov. 8, 2021.
Prior Publication US 2023/0146986 A1, May 11, 2023
Int. Cl. H03K 17/081 (2006.01); G01R 15/16 (2006.01)
CPC H03K 17/08104 (2013.01) [G01R 15/16 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A power stage comprising a power transistor controlled via a driver, the power transistor comprising three terminals including a collector c, an emitter e and a gate g linked to the driver, the power stage comprising a detection device for detecting a short-circuit current cc between the collector c and the emitter e, the detection device comprising a voltage sensor capable of detecting a voltage Vge at the gate g of the power transistor outside of a predefined voltage range, the detection device comprising a capacitance measurement sensor configured to measure an equivalent capacitance value Cge at the gate g of the power transistor and compare the gate equivalent capacitance value Cge to a predefined capacitance value, the detection device comprising an energy storage device configured to deliver an additional voltage to the gate g if the capacitance measurement sensor detects that the value of the gate equivalent capacitance Cge is lower than the predefined capacitance value.