18891071. SHORT-CIRCUIT DETECTION CIRCUIT FOR SEMICONDUCTOR SWITCH (DENSO CORPORATION)
SHORT-CIRCUIT DETECTION CIRCUIT FOR SEMICONDUCTOR SWITCH
Organization Name
Inventor(s)
Akira Tokumasu of Kariya-city (JP)
SHORT-CIRCUIT DETECTION CIRCUIT FOR SEMICONDUCTOR SWITCH
This abstract first appeared for US patent application 18891071 titled 'SHORT-CIRCUIT DETECTION CIRCUIT FOR SEMICONDUCTOR SWITCH
Original Abstract Submitted
A short-circuit detecting circuit is applied for a DESAT detecting circuit provided with a diode of which the cathode is connected to a high potential side terminal of an insulated gate type semiconductor element and a capacitor of which the first end is connected to an anode side of the diode and a second end is connected to a low potential side of the semiconductor switching element, detecting a short-circuit of the semiconductor element. The short-circuit detecting circuit includes a gate voltage terminal though which a gate voltage of the semiconductor is acquired; a DESAT voltage terminal through which a desaturation voltage corresponding to a capacitor voltage of the capacitor is acquired; and a determination circuit that detects, based on (i) the gate voltage exceeding a predetermined gate voltage threshold and (ii) the DESAT voltage exceeding a predetermined DESAT voltage threshold, a short-circuit of the semiconductor switching element.