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A detailed explanation of the IGBT in the golden age of domestic semiconductors (Part 2)

source:运营01 time:2022-11-28 15:31 Views:1102

In the previous article, we talked about the basic knowledge of IGBT and the parameters that IGBT needs to be tested. In this article, we will talk about how to perform IGBT static parameter testing. First of all, let's review what is a static parameter test?

The static parameters of the IGBT mainly refer to the relevant parameters that are inherent in the IGBT itself and have nothing to do with its working conditions. Only when there is no problem with the static parameters of the IGBT can the dynamic parameters (switching time, switching loss, reverse recovery of the freewheeling diode), power cycle , HTRB reliability is tested.


Let's take a look at the meaning of these ten parameters:

1. Collector-emitter voltage VCES


Under the condition of gate-emitter short circuit, the maximum voltage between collector and emitter


2. Collector-emitter saturation voltage VCEsat


Under the specified gate voltage and collector current, the voltage between collector and emitter


3. Gate-emitter threshold voltage VGE


When the gate current is the specified value, the gate-emitter voltage


4. Gate threshold voltage VGE (th)


The gate-emitter voltage at which the collector current is at a specified low or absolute value, used to measure the IGBT gate turn-on threshold


5. Collector-emitter cut-off current ICES


The current flowing through the collector at a specified collector-emitter voltage and gate-emitter short circuit


6. Gate-emitter leakage current IGES


The current flowing through the gate at a specified gate-emitter voltage and collector-emitter short circuit


7. Gate resistance rg


Gate Internal Series Resistance


8. Output capacitance Coes


Parasitic capacitance measured between collector and emitter with gate-emitter short circuit


9. Input capacitance Cies


Parasitic capacitance between gate and emitter


10. Reverse transmission capacitance Cres


Capacitance between collector terminal and gate terminal


The items of IGBT static parameter test are numerous and complicated, and different parameters have different test methods. So, how do we conduct IGBT static parameter testing? Next, I will explain it to you through a short video.



Through the above video, we understand the difficulties of IGBT static parameter testing, and from this we can see that it is very important to establish a high-voltage, high-current IGBT static parameter testing platform. So, how do we build an IGBT static parameter test system? How should the test lines be connected?


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