IEEE Power Electronics Magazine - June 2023 - 55

the MOSFET, which is a dominant part of the on-resistance
in SiC MOSFETs. As a result, the pattern of the on-resistance
shift is relatively similar to the Vth shift pattern. In
addition to Vth shift due to gate oxide degradation, there are
other failure modes related to the package, such as wire
bond liftoff, heal crack, and surface reconstruction, which
can also cause a sudden change in the on-resistance shift
pattern. Figure 8 shows the on-resistance change over the
power cycles. After conducting a comparison between the
ac power cycling test and dc power cycling test, it can be
observed that the ac power cycling test leads to a greater
change in on-resistance for a given threshold voltage shift.
Furthermore, the dc power cycling test indicates a relatively
smaller threshold voltage shift. The reason for this
is that, during the ac power cycling test, hot carrier injection
occurs due to the switching transients in addition to
the bias temperature effect, resulting in a negative threshold
voltage shift. Nevertheless, the bias temperature effect
remains the dominant factor, leading to an overall positive
shift in the threshold voltage.
Body Diode Characteristics (IS-VSD)
Another suitable precursor for aging monitoring in MOSFET
is the reverse voltage drop (VSD). At higher currents,
the voltage drop across the package interconnection
becomes remarkable, and therefore, the body diode voltage
is a reliable indicator of package degradation. Nevertheless,
self-heating can cause a significant impact on
junction temperature at high currents. At zero gate voltage,
the body diode voltage can serve as an indicator for
both gate oxide and package degradations. This is a consequence
of the conduction of both the channel and the
PiN diode at zero voltage in SiC MOSFETs, known as the
" body diode effect " [13]. Negative gate bias can eliminate
the body diode effect, and the body diode voltage change
can be used as a precursor of gate oxide degradation at
negative gate voltage and low current. To be specific, at a
negative voltage, the current flow occurs exclusively
through the PiN diode without the involvement of the
FIG 8 On-resistance change over power cycles (at VGS = 15 V,
ID = 20 A).
FIG 9 Body diode characteristic change over power cycles (at
VGS = 0 V TCASE = 30 °C).
FIG 10 Parasitic capacitances change over power cycles (at
f = 1 MHz, VAC = 30 mV). (a) Input capacitance. (b) Output
capacitance. (c) Reverse transfers capacitance.
June 2023 z IEEE POWER ELECTRONICS MAGAZINE 55

IEEE Power Electronics Magazine - June 2023

Table of Contents for the Digital Edition of IEEE Power Electronics Magazine - June 2023

Contents
IEEE Power Electronics Magazine - June 2023 - Cover1
IEEE Power Electronics Magazine - June 2023 - Cover2
IEEE Power Electronics Magazine - June 2023 - Contents
IEEE Power Electronics Magazine - June 2023 - 2
IEEE Power Electronics Magazine - June 2023 - 3
IEEE Power Electronics Magazine - June 2023 - 4
IEEE Power Electronics Magazine - June 2023 - 5
IEEE Power Electronics Magazine - June 2023 - 6
IEEE Power Electronics Magazine - June 2023 - 7
IEEE Power Electronics Magazine - June 2023 - 8
IEEE Power Electronics Magazine - June 2023 - 9
IEEE Power Electronics Magazine - June 2023 - 10
IEEE Power Electronics Magazine - June 2023 - 11
IEEE Power Electronics Magazine - June 2023 - 12
IEEE Power Electronics Magazine - June 2023 - 13
IEEE Power Electronics Magazine - June 2023 - 14
IEEE Power Electronics Magazine - June 2023 - 15
IEEE Power Electronics Magazine - June 2023 - 16
IEEE Power Electronics Magazine - June 2023 - 17
IEEE Power Electronics Magazine - June 2023 - 18
IEEE Power Electronics Magazine - June 2023 - 19
IEEE Power Electronics Magazine - June 2023 - 20
IEEE Power Electronics Magazine - June 2023 - 21
IEEE Power Electronics Magazine - June 2023 - 22
IEEE Power Electronics Magazine - June 2023 - 23
IEEE Power Electronics Magazine - June 2023 - 24
IEEE Power Electronics Magazine - June 2023 - 25
IEEE Power Electronics Magazine - June 2023 - 26
IEEE Power Electronics Magazine - June 2023 - 27
IEEE Power Electronics Magazine - June 2023 - 28
IEEE Power Electronics Magazine - June 2023 - 29
IEEE Power Electronics Magazine - June 2023 - 30
IEEE Power Electronics Magazine - June 2023 - 31
IEEE Power Electronics Magazine - June 2023 - 32
IEEE Power Electronics Magazine - June 2023 - 33
IEEE Power Electronics Magazine - June 2023 - 34
IEEE Power Electronics Magazine - June 2023 - 35
IEEE Power Electronics Magazine - June 2023 - 36
IEEE Power Electronics Magazine - June 2023 - 37
IEEE Power Electronics Magazine - June 2023 - 38
IEEE Power Electronics Magazine - June 2023 - 39
IEEE Power Electronics Magazine - June 2023 - 40
IEEE Power Electronics Magazine - June 2023 - 41
IEEE Power Electronics Magazine - June 2023 - 42
IEEE Power Electronics Magazine - June 2023 - 43
IEEE Power Electronics Magazine - June 2023 - 44
IEEE Power Electronics Magazine - June 2023 - 45
IEEE Power Electronics Magazine - June 2023 - 46
IEEE Power Electronics Magazine - June 2023 - 47
IEEE Power Electronics Magazine - June 2023 - 48
IEEE Power Electronics Magazine - June 2023 - 49
IEEE Power Electronics Magazine - June 2023 - 50
IEEE Power Electronics Magazine - June 2023 - 51
IEEE Power Electronics Magazine - June 2023 - 52
IEEE Power Electronics Magazine - June 2023 - 53
IEEE Power Electronics Magazine - June 2023 - 54
IEEE Power Electronics Magazine - June 2023 - 55
IEEE Power Electronics Magazine - June 2023 - 56
IEEE Power Electronics Magazine - June 2023 - 57
IEEE Power Electronics Magazine - June 2023 - 58
IEEE Power Electronics Magazine - June 2023 - 59
IEEE Power Electronics Magazine - June 2023 - 60
IEEE Power Electronics Magazine - June 2023 - 61
IEEE Power Electronics Magazine - June 2023 - 62
IEEE Power Electronics Magazine - June 2023 - 63
IEEE Power Electronics Magazine - June 2023 - 64
IEEE Power Electronics Magazine - June 2023 - 65
IEEE Power Electronics Magazine - June 2023 - 66
IEEE Power Electronics Magazine - June 2023 - 67
IEEE Power Electronics Magazine - June 2023 - 68
IEEE Power Electronics Magazine - June 2023 - 69
IEEE Power Electronics Magazine - June 2023 - 70
IEEE Power Electronics Magazine - June 2023 - 71
IEEE Power Electronics Magazine - June 2023 - 72
IEEE Power Electronics Magazine - June 2023 - 73
IEEE Power Electronics Magazine - June 2023 - 74
IEEE Power Electronics Magazine - June 2023 - 75
IEEE Power Electronics Magazine - June 2023 - 76
IEEE Power Electronics Magazine - June 2023 - 77
IEEE Power Electronics Magazine - June 2023 - 78
IEEE Power Electronics Magazine - June 2023 - 79
IEEE Power Electronics Magazine - June 2023 - 80
IEEE Power Electronics Magazine - June 2023 - 81
IEEE Power Electronics Magazine - June 2023 - 82
IEEE Power Electronics Magazine - June 2023 - 83
IEEE Power Electronics Magazine - June 2023 - 84
IEEE Power Electronics Magazine - June 2023 - 85
IEEE Power Electronics Magazine - June 2023 - 86
IEEE Power Electronics Magazine - June 2023 - 87
IEEE Power Electronics Magazine - June 2023 - 88
IEEE Power Electronics Magazine - June 2023 - 89
IEEE Power Electronics Magazine - June 2023 - 90
IEEE Power Electronics Magazine - June 2023 - 91
IEEE Power Electronics Magazine - June 2023 - 92
IEEE Power Electronics Magazine - June 2023 - 93
IEEE Power Electronics Magazine - June 2023 - 94
IEEE Power Electronics Magazine - June 2023 - 95
IEEE Power Electronics Magazine - June 2023 - 96
IEEE Power Electronics Magazine - June 2023 - 97
IEEE Power Electronics Magazine - June 2023 - 98
IEEE Power Electronics Magazine - June 2023 - 99
IEEE Power Electronics Magazine - June 2023 - 100
IEEE Power Electronics Magazine - June 2023 - 101
IEEE Power Electronics Magazine - June 2023 - 102
IEEE Power Electronics Magazine - June 2023 - 103
IEEE Power Electronics Magazine - June 2023 - 104
IEEE Power Electronics Magazine - June 2023 - 105
IEEE Power Electronics Magazine - June 2023 - 106
IEEE Power Electronics Magazine - June 2023 - 107
IEEE Power Electronics Magazine - June 2023 - 108
IEEE Power Electronics Magazine - June 2023 - 109
IEEE Power Electronics Magazine - June 2023 - 110
IEEE Power Electronics Magazine - June 2023 - 111
IEEE Power Electronics Magazine - June 2023 - 112
IEEE Power Electronics Magazine - June 2023 - 113
IEEE Power Electronics Magazine - June 2023 - 114
IEEE Power Electronics Magazine - June 2023 - 115
IEEE Power Electronics Magazine - June 2023 - 116
IEEE Power Electronics Magazine - June 2023 - 117
IEEE Power Electronics Magazine - June 2023 - 118
IEEE Power Electronics Magazine - June 2023 - 119
IEEE Power Electronics Magazine - June 2023 - 120
IEEE Power Electronics Magazine - June 2023 - 121
IEEE Power Electronics Magazine - June 2023 - 122
IEEE Power Electronics Magazine - June 2023 - 123
IEEE Power Electronics Magazine - June 2023 - 124
IEEE Power Electronics Magazine - June 2023 - Cover3
IEEE Power Electronics Magazine - June 2023 - Cover4
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_september2023
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_june2023
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_march2023
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_december2022
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_september2022
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_june2022
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_march2022
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_december2021
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_september2021
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_june2021
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_march2021
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_december2020
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_september2020
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_june2020
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_march2020
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_december2019
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_september2019
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_june2019
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_march2019
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_december2018
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_september2018
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_june2018
https://www.nxtbook.com/nxtbooks/ieee/pelcompendium_march2018
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_march2018
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_september2017
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_june2017
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_march2017
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_december2016
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_september2016
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_june2016
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_march2016
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_december2015
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_september2015
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_june2015
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_march2015
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_december2014
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_september2014
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_june2014
https://www.nxtbook.com/nxtbooks/ieee/powerelectronics_march2014
https://www.nxtbookmedia.com