This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English version of the page.

Note: This page has been translated by MathWorks. Click here to see
To view all translated materials including this page, select Country from the country navigator on the bottom of this page.

MOSFET Fault in Buck Converter

This model shows how a fault may be applied to a MOSFET in a power converter in order to explore the operation of protection circuitry. After the MOSFET becomes faulted, the crowbar circuitry is activated in order to clamp the output voltage across the load and eventually to cause the fuse to blow.

Model

Faulted Switch Subsystem

Crowbar Subsystem

Simulation Results from Simscape Logging

The plot below shows the current passing through the input Fuse and the voltage across the Load resistor.