Plot Basic Characteristics for Semiconductor Blocks
You can plot the basic I-V characteristics for semiconductor blocks based on the current block parameter values without simulating a model.
To plot the basic characteristics, right-click a semiconductor block in your model that supports this option and select Electrical > Basic characteristics from the context menu. The software computes a set of bias conditions using the block parameter values and then opens a figure window containing a plot of the DC I-V characteristics for the block. For example, the Basic characteristics option generates this figure for the N-Channel MOSFET block with default parameter values.
If you change the block parameter values and plot the characteristics again, the plot
opens in a new window. You can compare the plots side-by-side to see how the parameter
values affect the I-V characteristics. For example, if you set the Gate-source
voltage, Vgs, for R_DS(on) parameter of the N-Channel
MOSFET block to
V, and select the Basic
characteristics option again, you generate this plot.
You can use the Basic characteristics option with these semiconductor blocks.
|Block||Modeling option Parameter Values|
|IGBT (Ideal, Switching)|
|MOSFET (Ideal, Switching)|
|N-Channel LDMOS FET|
|P-Channel LDMOS FET|
|NPN Bipolar Transistor|
|PNP Bipolar Transistor|
The Basic characteristics option has additional capabilities if you use the option with the IGBT (Ideal, Switching) or MOSFET (Ideal, Switching) blocks. For more information, see Plot Basic Characteristics for Ideal Semiconductors.
The N-Channel MOSFET and P-Channel
MOSFET blocks also support the Explore
characteristics option. Use this option to perform an in-depth study of
block characteristics and match the block behavior to a set of target characteristics.
To enable this option, set the Modeling option parameter of the
Surface potential based. Then, right-click the block
and select Electrical > Explore
characteristics from the context menu. For more information about this
option, see MOSFET Characteristics Viewer.
Plot Basic Characteristics for Ideal Semiconductors
The Basic characteristics option has additional capabilities with these blocks from the Semiconductors library:
The plots you generate with the Basic characteristics option depend on the values you specify for the Modeling option, On-state behavior and losses, and Integral protection diode parameters of the block.
To plot only the on-state and off-state I-V characteristics of the switching device,
set the Modeling option parameter to
port and set the Integral protection diode
None. Then, right-click the block in your model
and select Electrical > Basic
characteristics from the context menu. For example, the
Basic characteristics option generates this plot for the
IGBT (Ideal, Switching) block with default parameter
You can also plot the on-state and off-state I-V characteristics of an integral
protection diode. Set the Integral Protection Diode parameter to
Diode with no dynamics or
Diode with charge
dynamics. The Basic characteristics option
plots the I-V characteristics of the switching device and the integral protection diode
You can also generate surface plots of the turn-on energy loss and turn-off energy
loss as functions of the on-state current and off-state voltage. Set the
Modeling option parameter to
port and set the On-state behavior and losses
Specify constant values. The Basic
characteristics option opens the surface plots in this figure in a
separate window to the I-V characteristics plots.
If you set the On-state behavior and losses parameter to
Tabulate, the Basic
characteristics option plots the results over a range of temperatures.
Surface plots for different temperatures open in different windows. The I-V
characteristics plots show the results for different temperatures on a single graph in
an additional window.
Plot Basic Characteristics of Semiconductor Sensors
These semiconductor sensor blocks in the Sensors & Transducers library support the Basic characteristics option if you disable the thermal port of the block.
To disable the thermal port of the block, set the Modeling option
No thermal port.