Industry trends

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?

The editor who loves science popularization and is a good teacher has appeared again~

Industry White Paper

"IGBT Power Device Static Parameter Test Solution"

Coverage:

- IGBT and its application development

- IGBT main test parameters

- Difficulties in IGBT testing

- IGBT static parameter test solution

- IGBT static parameter test connection diagram

- IGBT static test fixture solution

Program features:

- Support static parameter testing of power devices up to 3.5kV/6kA

- With large current output/measurement capability, up to 6000A

- Accurate weak signal test capability, nA level leakage current, μΩ level on-resistance

- 1% measurement accuracy

- Can be flexibly matched with a variety of measurement units

- Support one-key test of all national standard indicators

- Flexible fixture adaptation

Applicable industries:

- New energy vehicles/household appliances

- Industrial frequency conversion/power electronics

- Photovoltaic/Solar/Wind Power/Energy Storage

- Smart Grid/Rail Transit