IEEE Power Electronics Magazine - December 2021 - 36

Calculated Tj Versus Measured Tj at Vin 230 Vac
Calculated Tj Versus Measured Tj at Vin 175 Vac
45
42
39
36
33
30
0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000
Pout (W)
(a)
55
50
45
40
35
30
0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000
Pout (W)
(b)
2X UJ4C075018K4S Calculated Tj
2X UJ4C075018K4S Measured Tj
FIG 9 Measured Tj vs calculated Tj. (a) at high line, (b) at low line.
HF Leg Loss per FET Versus Load at Vin = 230 Vac
9
8
7
6
5
4
3
2
1
10 20 30 40 50
60 70 80 90 100
(%)
(a)
UJ4C075018K4S Psw
UJ4C075018K4S Pcond
FIG 10 Calculated loss per FET for UJ4C075018K4S at high line (a), low line (b). Psw (switching loss), Pcond (conduction loss).
D1
ac
D2
Q2
Q1
L1
C1
Tj_calculated = Theatsink + RthJH*Ploss......
D4
(1)
As shown in Figure 10 at high line full load the loss
FIG 11 Cost-effective solution: replacing low frequency leg
with Si diodes.
36 IEEE POWER ELECTRONICS MAGAZINE z December 2021
per FET is only 7.8 W. Therefore, smaller package and
surface mount package can be used to further reduce
cost, board size, and increase power density. Thanks to
Gen 4 FET's superior on-resistance per unit area, we can
provide the 750 V 18 mΩ device in TO220 and D2PAK7L
packages.
D3
JET calculator results represent actual measurement very
well. Therefore, designers can use the FET JET calculator
to choose topology and devices with confidence. There is a
dip in Tj near 40% of load due to fan starts to blow harder
at that point.
12
10
8
6
4
2
10 20 30 40 50
60 70 80 90 100
(%)
(b)
HF Leg Loss per FET Versus Load at Vin = 175 Vac
Tj (°C)
Loss/FET: (W)
Loss/FET: (W)
Tj (°C)

IEEE Power Electronics Magazine - December 2021

Table of Contents for the Digital Edition of IEEE Power Electronics Magazine - December 2021

Contents
IEEE Power Electronics Magazine - December 2021 - Cover1
IEEE Power Electronics Magazine - December 2021 - Cover2
IEEE Power Electronics Magazine - December 2021 - Contents
IEEE Power Electronics Magazine - December 2021 - 2
IEEE Power Electronics Magazine - December 2021 - 3
IEEE Power Electronics Magazine - December 2021 - 4
IEEE Power Electronics Magazine - December 2021 - 5
IEEE Power Electronics Magazine - December 2021 - 6
IEEE Power Electronics Magazine - December 2021 - 7
IEEE Power Electronics Magazine - December 2021 - 8
IEEE Power Electronics Magazine - December 2021 - 9
IEEE Power Electronics Magazine - December 2021 - 10
IEEE Power Electronics Magazine - December 2021 - 11
IEEE Power Electronics Magazine - December 2021 - 12
IEEE Power Electronics Magazine - December 2021 - 13
IEEE Power Electronics Magazine - December 2021 - 14
IEEE Power Electronics Magazine - December 2021 - 15
IEEE Power Electronics Magazine - December 2021 - 16
IEEE Power Electronics Magazine - December 2021 - 17
IEEE Power Electronics Magazine - December 2021 - 18
IEEE Power Electronics Magazine - December 2021 - 19
IEEE Power Electronics Magazine - December 2021 - 20
IEEE Power Electronics Magazine - December 2021 - 21
IEEE Power Electronics Magazine - December 2021 - 22
IEEE Power Electronics Magazine - December 2021 - 23
IEEE Power Electronics Magazine - December 2021 - 24
IEEE Power Electronics Magazine - December 2021 - 25
IEEE Power Electronics Magazine - December 2021 - 26
IEEE Power Electronics Magazine - December 2021 - 27
IEEE Power Electronics Magazine - December 2021 - 28
IEEE Power Electronics Magazine - December 2021 - 29
IEEE Power Electronics Magazine - December 2021 - 30
IEEE Power Electronics Magazine - December 2021 - 31
IEEE Power Electronics Magazine - December 2021 - 32
IEEE Power Electronics Magazine - December 2021 - 33
IEEE Power Electronics Magazine - December 2021 - 34
IEEE Power Electronics Magazine - December 2021 - 35
IEEE Power Electronics Magazine - December 2021 - 36
IEEE Power Electronics Magazine - December 2021 - 37
IEEE Power Electronics Magazine - December 2021 - 38
IEEE Power Electronics Magazine - December 2021 - 39
IEEE Power Electronics Magazine - December 2021 - 40
IEEE Power Electronics Magazine - December 2021 - 41
IEEE Power Electronics Magazine - December 2021 - 42
IEEE Power Electronics Magazine - December 2021 - 43
IEEE Power Electronics Magazine - December 2021 - 44
IEEE Power Electronics Magazine - December 2021 - 45
IEEE Power Electronics Magazine - December 2021 - 46
IEEE Power Electronics Magazine - December 2021 - 47
IEEE Power Electronics Magazine - December 2021 - 48
IEEE Power Electronics Magazine - December 2021 - 49
IEEE Power Electronics Magazine - December 2021 - 50
IEEE Power Electronics Magazine - December 2021 - 51
IEEE Power Electronics Magazine - December 2021 - 52
IEEE Power Electronics Magazine - December 2021 - 53
IEEE Power Electronics Magazine - December 2021 - 54
IEEE Power Electronics Magazine - December 2021 - 55
IEEE Power Electronics Magazine - December 2021 - 56
IEEE Power Electronics Magazine - December 2021 - 57
IEEE Power Electronics Magazine - December 2021 - 58
IEEE Power Electronics Magazine - December 2021 - 59
IEEE Power Electronics Magazine - December 2021 - 60
IEEE Power Electronics Magazine - December 2021 - 61
IEEE Power Electronics Magazine - December 2021 - 62
IEEE Power Electronics Magazine - December 2021 - 63
IEEE Power Electronics Magazine - December 2021 - 64
IEEE Power Electronics Magazine - December 2021 - 65
IEEE Power Electronics Magazine - December 2021 - 66
IEEE Power Electronics Magazine - December 2021 - 67
IEEE Power Electronics Magazine - December 2021 - 68
IEEE Power Electronics Magazine - December 2021 - 69
IEEE Power Electronics Magazine - December 2021 - 70
IEEE Power Electronics Magazine - December 2021 - 71
IEEE Power Electronics Magazine - December 2021 - 72
IEEE Power Electronics Magazine - December 2021 - 73
IEEE Power Electronics Magazine - December 2021 - 74
IEEE Power Electronics Magazine - December 2021 - 75
IEEE Power Electronics Magazine - December 2021 - 76
IEEE Power Electronics Magazine - December 2021 - Cover3
IEEE Power Electronics Magazine - December 2021 - 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