Change in MOSFET ON-State Resistance RDS(ON)
The boost converter shown in Fig. 3 has been simulated in
PSIM, and the results have been imported to MATLAB to calculate
the reliability. The feedback controller was implemented
using a simple PI controller with a gain of 0.1, and the time
constant was set to 0.001. Output capacitor’s capacitance and
ESR were set to 10 μF and 0.1 Ω, respectively. RDS(ON) of the
MOSFET was varied from 34 to 44 mΩ. This variation of ONstate
resistance is consistent with the experimental data reported
in [22] (as a result of accelerated thermal aging process of a
MOSFET).