Overcurrent Protection Method for Composite Power Semiconductor Switches

Overcurrent Protection Method for Composite Power Semiconductor Switches

Various examples are provided related to overcurrent protection for composite power semiconductor switches comprising a high voltage power switch in series with a low voltage non-linear element. In one example, a system includes a blocking diode connected to a sensing node of a composite switching d...

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Hauptverfasser: Baliga, Bantval Jayant, Kanale, Ajit, Shah, Suyash Sushilkumar, Bhattacharya, Subhashish
Format: Patent
Sprache:eng
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BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
PULSE TECHNIQUE
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creator Baliga, Bantval Jayant
Kanale, Ajit
Shah, Suyash Sushilkumar
Bhattacharya, Subhashish
description Various examples are provided related to overcurrent protection for composite power semiconductor switches comprising a high voltage power switch in series with a low voltage non-linear element. In one example, a system includes a blocking diode connected to a sensing node of a composite switching device; a resistor connected in series with the blocking diode and to a desaturation detection input of a gate driver circuit; and a blanking capacitor connected between the desaturation detection input and a common voltage reference of the gate driver circuit. The gate driver circuit can detect a short circuit condition based upon a sensed voltage at the desaturation detection input. In another example, a method includes sensing a voltage on a blanking capacitor, the voltage provided from a sensing node of a composite switching device via a blocking diode and a resistor, and detecting a short circuit condition based upon the sensed voltage.
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subjects BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
PULSE TECHNIQUE
title Overcurrent Protection Method for Composite Power Semiconductor Switches
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