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Semiconductor device desaturation state detection circuit

A state detection and semiconductor technology, applied in the field of detection, can solve the problems of high cost and increase the cost of IGBT detection, and achieve the effect of saving the cost of detection and expanding the scope of application

Pending Publication Date: 2021-11-26
SHENZHEN INOVANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, isolated driver chips integrated with desaturation protection are often used for desaturation state detection in isolation scenarios; moreover, the cost of isolated driver chips integrated with desaturation protection is high, which will increase the detection cost of IGBTs

Method used

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  • Semiconductor device desaturation state detection circuit
  • Semiconductor device desaturation state detection circuit
  • Semiconductor device desaturation state detection circuit

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Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The invention provides a semiconductor device desaturation state detection circuit. The semiconductor device desaturation state detection circuit comprises a driving unit used for driving a semiconductor device, a first current limiting resistor, a first one-way conduction element, a second one-way conduction element, a pull-up resistor, a voltage stabilization unit, a fault signal generation unit and a controller. According to the technical scheme, the detection cost of entering the desaturation state of the semiconductor device can be reduced.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a semiconductor device desaturation state detection circuit. Background technique [0002] In the design process of the inverter, the IGBT (Insulated Gate Bipolar Transistor) and the insulated gate bipolar transistor enter the desaturation state mainly through the integrated isolation driver chip with desaturation protection. [0003] However, isolated driver chips integrated with desaturation protection are often used for desaturation state detection in isolation scenarios; moreover, the cost of isolated driver chips integrated with desaturation protection is high, which will increase the detection cost of IGBTs. Contents of the invention [0004] The invention proposes a semiconductor device desaturation state detection circuit, aiming at reducing the detection cost of the semiconductor device entering the desaturation state. [0005] To achieve the above object, the prese...

Claims

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Application Information

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IPC IPC(8): G01R31/26
CPCG01R31/2608
Inventor 赵怀阳
Owner SHENZHEN INOVANCE TECH