Parameterize Half-Bridge Block from Wolfspeed Datasheets

Since R2026a

This example shows how to import the device parameters from Wolfspeed® datasheets for MOSFETs and diodes into a Half-Bridge (Ideal, Switching) block.

Open Model

Open the ImportWolfspeedPartsToHalfBridge model and specify the block path. The Half-Bridge (Ideal, Switching) block uses ideal switching for fast simulation. You can optionally draw the requisite power due to switching losses from the electrical supply.

modelName = "ImportWolfspeedPartsToHalfBridge";
open_system(modelName);
blockPath = modelName + "/HalfBridge";

Import Device Parameters

To import the device parameters into the Half-Bridge (Ideal, Switching) block, first specify the XML files.

switchingDeviceFile = "CAB400M12XM3_mosfet.xml";
diodeFile = "CAB400M12XM3_bodydiode.xml";

For Wolfspeed datasheets, specify the switch-on and switch-off gate resistance values.

gateResistanceOn = 20;
gateResistanceOff = 9;

Use the ee_importDeviceParameters function to import the device parameters from the XML files into the block.

ee_importDeviceParameters({switchingDeviceFile,diodeFile},"wolfspeed",blockPath,...
GateResistanceOn=gateResistanceOn,GateResistanceOff=gateResistanceOff);

Current axis diode_IfVec contains a negative value. Removing negative current value and the corresponding column of lookup table diode_VfMat for parameterization.
Off-state voltage for loss data (Voff) contains invalid value 0. Replacing the value with 10.

After the parameterization, observe the annotations under the Half-Bridge (Ideal, Switching) block.

If the datasheet does not provide a value for a block parameter, the ee_importDeviceParameters function automatically assigns the default value to this block parameter and appends % Parameter not set. After the parameterization, check for block parameters that contain % Parameter not set in their value.

This table shows some of the parameters of the Half-Bridge (Ideal, Switching) block in this example after the parameterization.

Block Parameter	Parameter Value	Data Source
Off-state conductance	1e-06 % Parameter not set	Default value
Temperature vector for losses, Tj	[25 100 150 175]	MOSFET datasheet
Junction temperatures, Tj	[25 175]	Diode datasheet

offConductance = get_param(blockPath,"Goff");
temperatureVector = get_param(blockPath,"mosfet_Tj_loss");
junctionTemperature = get_param(blockPath,"diode_TjVec");

Simulate Model and Plot Results

Simulate the model.

sim(modelName);

Plot the voltage, current, conduction losses, and switching losses for the upper switching device and lower diode.

ImportWolfspeedPartsToHalfBridgePlot;